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Spectral modelling of deep multi-frequency radio data confirms 12 faint high-redshift remnant radio galaxies with short ages of roughly 8–42 Myr, showing the remnant phase can be brief and dynamic.

Reviewed by Pith at T0; open to challenge. T0 means a machine referee read the full paper against a public rubric. the ladder, T0–T4 →

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T0 review · grok-4.5

2026-07-14 14:35 UTC pith:CHSYUQI5

load-bearing objection Solid multi-frequency spectral-ageing paper that cleanly confirms 12 high-z remnants with short ages; main systematic is the usual B-field scaling, already flagged. the 2 major comments →

arxiv 2607.09920 v1 pith:CHSYUQI5 submitted 2026-07-10 astro-ph.GA

SuperMIGHTEE : Spectral Ages of Remnant Radio Galaxy Candidates in the XMM-LSS Field

Sushant Dutta , Veeresh Singh , C.H. Ishwara Chandra , Yogesh Wadadekar , Russ Taylor , Mattia Vaccari , Lucia Marchetti , Matt Jarvis
show 3 more authors
Catherine Hale Solohery Randriamampandry Zara Randriamanakoto
This is my paper
classification astro-ph.GA
keywords remnant radio galaxiesspectral ageingAGN duty cyclesMeerKAT MIGHTEEuGMRT superMIGHTEEinverse-Compton lossesradio continuum surveysXMM-LSS
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

Remnant radio galaxies are sources whose jets have switched off, so their lobes fade without fresh particle injection. This paper takes 14 candidates in the XMM-LSS field and models their radio spectra from 144 MHz to 1.5 GHz using new MeerKAT and uGMRT data together with archival LOFAR, GMRT and JVLA observations. Continuous-injection-off models fit 12 of the sources as true remnants while reclassifying two as still active, underscoring that sparse frequency coverage can mislead. The confirmed remnants have total spectral ages of only 8–42 Myr (median about 12 Myr) and remnant-to-total age ratios that range from 0.04 to 0.83. The short ages are attributed mainly to stronger inverse-Compton losses at the sample’s higher redshifts (median z = 1.25) and to rapid expansion in low-density environments. Pixel-based age maps agree with the integrated fits and reveal ordered gradients in the larger sources. Together the results point to a previously under-sampled population of faint, rapidly fading remnants whose duty cycles are shorter and more varied than those of the classical low-redshift examples.

Core claim

Of 14 morphologically and spectrally selected remnant candidates, continuous-injection-off modelling of 144 MHz–1.5 GHz SEDs confirms 12 as genuine remnants with total spectral ages 8.06–41.97 Myr (median ~12 Myr) and remnant-to-total age fractions spanning 0.04–0.83; the remaining two sources are better described by continuous injection and are therefore still active. Pixel-resolved JP-Tribble age maps yield consistent ages (~3–43 Myr). The short ages are interpreted as the product of enhanced inverse-Compton losses at median redshift 1.25 and rapid lobe expansion in non-cluster environments, revealing a faint, high-redshift remnant population that fades faster than previously studied class

What carries the argument

Continuous-injection-off (CI_OFF / KGJP) spectral modelling in BRATS, supplied with magnetic fields set to 0.4 times the equipartition values returned by PySynch under assumed source geometries, which simultaneously yields the low- and high-frequency breaks, the active lifetime t_ON, the remnant lifetime t_OFF and the total age t_s.

Load-bearing premise

All ages rest on magnetic-field strengths fixed at 0.4 times the equipartition value calculated for assumed source shapes, with no formal uncertainties returned by the code; any systematic offset in that field directly rescales every age and every remnant-to-total ratio.

What would settle it

Independent X-ray inverse-Compton measurements of lobe magnetic fields for the same sources that differ by more than ~35 percent from the adopted 0.4 B_eq values would systematically shift the derived spectral ages and t_OFF/t_s ratios outside the reported ranges.

Watch this falsifier — get emailed when new claim-graph text bears on it.

If this is right

  • Sensitive multi-frequency coverage from 144 MHz to 1.5 GHz is required to avoid misclassifying still-active sources as remnants.
  • Faint high-redshift remnants can have active and remnant phases of only a few to a few tens of Myr, implying shorter AGN duty cycles than those of classical low-z samples.
  • Remnant-to-total age ratios from 0.04 to 0.83 show that the population spans the full range from recently switched-off to long-lived relics.
  • Pixel-based age maps that match integrated ages provide a practical route to constrain lobe dynamics and back-flow even after jet cessation.
  • Deep SKA continuum surveys will uncover large numbers of such faint, short-lived remnants and can use the same modelling framework to map AGN life cycles.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • If inverse-Compton losses dominate at z ≳ 1, the observable remnant fraction should fall with redshift even if the intrinsic switch-off rate stays constant, offering a direct prediction for SKA number counts.
  • The lack of a clear size–age correlation in low-density environments suggests expansion speed or ambient density variations can erase the classical age–size trend once jets turn off.
  • Sources with t_OFF/t_s near unity may be the progenitors of double-double radio galaxies if a subsequent jet episode restarts before the old lobes fade completely.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit.

Referee Report

2 major / 5 minor

Summary. The paper presents a spectral-ageing analysis of 14 remnant radio-galaxy candidates in the XMM-LSS field, using new MeerKAT MIGHTEE (1.284 GHz) and uGMRT superMIGHTEE (band-3/4) data together with LOFAR, GMRT and JVLA coverage spanning 144 MHz–1.5 GHz. Continuous-injection-off (CI_OFF/KGJP) modelling of the integrated SEDs reclassifies 12 sources as genuine remnants and two as still active; total spectral ages fall in the range ~8–42 Myr (median ~12 Myr) with t_OFF/t_s ratios spanning 0.04–0.83. Pixel-based JP-Tribble age maps are broadly consistent with the integrated ages. The short ages are attributed to enhanced inverse-Compton losses at the sample’s relatively high redshifts (median z = 1.25) and to possible rapid expansion in low-density environments, revealing a faint, rapidly fading remnant population that will be relevant for forthcoming SKA surveys.

Significance. If the ages and remnant classifications hold, the work supplies one of the first well-sampled multi-frequency characterisations of faint, high-redshift remnant radio galaxies and demonstrates that the remnant phase can be both short and dynamically diverse. The transparent reclassification of two candidates underscores the necessity of dense frequency coverage, while the consistency between integrated CI_OFF ages and spatially resolved JP-Tribble maps strengthens confidence in the derived timescales. The study therefore provides a useful empirical framework for AGN duty-cycle constraints and a practical template for remnant searches with SKA-pathfinder and SKA continuum surveys.

major comments (2)
  1. Section 4.2 and Table 3: magnetic-field strengths are fixed at 0.4 B_eq with geometries assumed spherical/cylindrical/ellipsoidal and no formal uncertainties returned by PySynch. Because spectral age scales as B^{0.5}/(B^{2} + B_CMB^{2}) (Eq. 2), any systematic offset in B rescales all ages and t_OFF/t_s ratios. A brief sensitivity test (e.g., B = 0.3–1.0 B_eq or a Monte-Carlo draw around the adopted scaling) would quantify how robust the claimed short-age population remains under this dominant systematic.
  2. Section 4.1 and Eq. (2): the radiative-loss formulae neglect adiabatic expansion. For the compact, high-z sources that dominate the sample this omission may be non-negligible; a short discussion of the expected bias (or an order-of-magnitude estimate of expansion losses) would clarify whether the reported ages are lower limits and how that affects the interpretation of a ‘rapidly fading’ population.
minor comments (5)
  1. Table 4: the two sources modelled with CI_ON are marked only by an asterisk; a clearer column or footnote stating ‘active / remnant’ would improve readability.
  2. Figure 2 / Figure 3 captions: the contour levels and beam size are repeated for every panel; a single global statement would reduce redundancy.
  3. Section 5: the statement that image-plane smoothing is ‘mathematically equivalent’ to u–v tapering is correct in principle, but a brief note that the effective weighting function is not identical to a standard Gaussian taper would avoid possible confusion for readers who re-image the data.
  4. Table 5: source names occasionally differ by a few arcseconds from those in Tables 2–4 (e.g., J022106-043925 vs J022106-043928); consistent naming would prevent matching errors.
  5. Abstract and Section 6: the phrase ‘previously underrepresented population’ is repeated; a single, precise formulation would suffice.

Circularity Check

1 steps flagged

No significant circularity: spectral ages are obtained by fitting standard CI_OFF/JP-Tribble models to independent multi-frequency fluxes; self-citations only supply the input candidate list.

specific steps
  1. self citation load bearing [Section 3 (The Sample) and Section 6 (Results)]
    "Our sample consists of 14 remnant candidates which are gleaned from our previous studies (Singh et al. 2021; Dutta et al. 2023). ... These two sources were originally classified as remnant candidates by Singh et al. (2021) based on radio SEDs with only three (150 MHz, 325 MHz and 1.4 GHz) data points. Their re-classification here as active systems underscores the critical role of sensitive, broad-band, multi-frequency radio observations"

    The input list of 14 candidates is taken entirely from the authors' own earlier papers. This is ordinary sample construction, not circular derivation of ages: the new multi-frequency SEDs and BRATS fits independently re-evaluate (and in two cases overturn) the prior classifications. The self-citation is therefore not load-bearing for the spectral-age results themselves.

full rationale

The paper's central results (12/14 sources confirmed as remnants, ts ~ 8-42 Myr, t_OFF/ts spanning 0.04-0.83) are produced by fitting the continuous-injection-off (CI_OFF/KGJP) and JP-Tribble models in BRATS to observed flux densities at six frequencies (144 MHz-1.5 GHz). Break frequencies and ages follow from the standard radiative-loss formula (Eq. 2) once B = 0.4 B_eq and alpha_inj are supplied; those inputs are either measured (fluxes, redshifts, sizes) or taken from conventional assumptions (equipartition scaling, literature range for alpha_inj). The two reclassifications as active are transparent outcomes of the same fitting procedure. Self-citations to Singh et al. (2021) and Dutta et al. (2023) define the parent sample of candidates but do not enter the age calculation or force the remnant/active classification. No equation reduces a claimed age or ratio to a fitted parameter by construction, and no uniqueness theorem or ansatz is imported from the authors' prior work to forbid alternatives. The only minor self-reference is the reuse of two previously studied sources whose ages are re-derived with new data; this is ordinary scientific practice and does not load-bear the new claims. Score 1 reflects that single, non-load-bearing self-citation chain.

Axiom & Free-Parameter Ledger

3 free parameters · 4 axioms · 0 invented entities

Central ages rest on standard synchrotron ageing formulae, the continuous-injection-off model, and the conventional 0.4 B_eq magnetic-field scaling. No new physical entities are introduced; free parameters are the usual injection indices and geometric assumptions required by equipartition calculations.

free parameters (3)
  • injection index α_inj = -0.53 to -0.68
    Treated as a free parameter in BRATS findinject; fitted values range from -0.53 to -0.68 (Table 4).
  • magnetic-field scaling factor = 0.4
    Fixed at 0.4 imes B_eq following Croston et al. (2005); not fitted but chosen by hand and directly rescales all ages.
  • source geometry (sphere/cylinder/ellipsoid)
    Chosen per source to compute volume and B_eq with PySynch (Table 3); different geometries change B and therefore age.
axioms (4)
  • domain assumption Synchrotron and inverse-Compton losses dominate; adiabatic expansion losses are neglected in the age formula (Eq. 2).
    Standard in spectral-ageing literature; stated in Section 4.1.
  • domain assumption Magnetic field is uniform (or locally varying only as in the Tribble model) and equal to 0.4 times the equipartition value.
    Section 4.2; justified by X-ray lobe studies but remains an assumption.
  • domain assumption Continuous-injection-off (CI_OFF / KGJP) model correctly describes the electron energy distribution after jet cessation.
    Section 4.4; two sources preferred CI_ON, validating the model-selection step.
  • domain assumption Host-galaxy redshifts (photometric or spectroscopic) correctly place the sources for luminosity and B_CMB calculations.
    Table 2; photometric redshifts carry larger uncertainties that propagate into ages.

pith-pipeline@v1.1.0-grok45 · 29313 in / 2669 out tokens · 20266 ms · 2026-07-14T14:35:12.492940+00:00 · methodology

0 comments
read the original abstract

Remnant radio galaxies, whose lobes are no longer replenished by jets from the active galactic nucleus (AGN), offer key constraints on AGN duty cycles and the timescales of radio jets. We present a spectral-ageing study of 14 candidate remnant radio galaxies in the XMM-LSS field, combining new broad-band data from the MeerKAT MIGHTEE (L-band) and uGMRT superMIGHTEE (band-3 and band-4) surveys with complementary observations from LOFAR, GMRT, and JVLA, covering 144 MHz-1.5 GHz. Spectral modeling confirms 12 sources as genuine remnants, while two are reclassified as active, emphasising the importance of sensitive, multi-frequency coverage for robust remnant identification. Pixel-based spectral age maps yield results (~3-43 Myr) broadly consistent with integrated estimates, revealing relatively short spectral ages (~8-42 Myr). These ages likely reflect enhanced inverse-Compton losses at higher redshifts (0.35 < z < 2.85; median z = 1.25) and possible rapid lobe expansion in low-density environments. The ratios of remnant to total source ages (t_OFF}/t_s) span 0.04-0.83, indicating that the sample traces a broad range of evolutionary stages. Our findings reveal a previously underrepresented population of faint, rapidly fading remnants, suggesting that the remnant phase may be shorter and more dynamic than previously thought. This study highlights the crucial role of MIGHTEE and superMIGHTEE surveys in reliably classifying genuine remnants and provides a framework for constraining AGN life cycles in preparation for forthcoming SKA surveys.

Figures

Figures reproduced from arXiv: 2607.09920 by Catherine Hale, C.H. Ishwara Chandra, Lucia Marchetti, Mattia Vaccari, Matt Jarvis, Russ Taylor, Solohery Randriamampandry, Sushant Dutta, Veeresh Singh, Yogesh Wadadekar, Zara Randriamanakoto.

Figure 1
Figure 1. Figure 1: Footprints of different radio surveys. The positions of remnant candidates are marked with ‘+’ symbols. mosaic in the XMM-LSS (see footprints in [PITH_FULL_IMAGE:figures/full_fig_p003_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: Left Panel : Band-3 (in green) uGMRT and 1.284 GHz (in red) MeerKAT radio contours overplotted onto the grey-scale HSC-SSP i−band image. The radio contour levels are at 3σ × (1, 2, 4, 8, 16 ...) and the corresponding optical image is logarithmically scaled. The magenta cross is the position of the potential host galaxy. Only 12/14 genuine remnant sources are shown in this figure. Middle panel : Best fit ra… view at source ↗
Figure 3
Figure 3. Figure 3: Left Panel : Band-3 (in green) uGMRT and 1.284 GHz (in red) MeerKAT radio contours overplotted onto the grey-scale HSC-SSP i−band image. The radio contour levels are at 3σ × (1, 2, 4, 8, 16 ...) and the corresponding optical image is logarithmically scaled. The magenta cross is the position of the potential host galaxy. Only 02/14 active sources are shown in this figure. Middle panel : Best fit radio SEDs … view at source ↗
Figure 4
Figure 4. Figure 4 [PITH_FULL_IMAGE:figures/full_fig_p013_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: A diagnostic plot of total physical size at 1.284 GHz ver￾sus spectral age of our sources using CIOFF model. We compare the spectral ages of our sample with those of remnant sources re￾ported in the literature. The scatter plot is colour coded by median redshift values. shifts. This diversity indicates that the remnants in our study occupy different evolutionary stages within the radio galaxy life cycle. C… view at source ↗
Figure 6
Figure 6. Figure 6: Plot of total source age ts versus fractional remnant time￾scale (tOFF/ts). The vertical color bar indicates the redshifts of remnant hosts. main detectable at higher redshifts, while intrinsically fainter systems fall below the survey sensitivity limit. As discussed in Section 6, the JP Tribble and CIOFF models yield comparable spectral age distributions, confirming that both adequately describe synchrotr… view at source ↗
Figure 8
Figure 8. Figure 8: Comparison of two spectral ageing models applied to the sample. The dashed line shows the best-fitting linear relation (linear correlation = 0.96) used to assess the consistency between the models. The data points are colour coded according to their reduced χ 2 values. MNRAS 000, 1–17 (2023) [PITH_FULL_IMAGE:figures/full_fig_p014_8.png] view at source ↗

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Reference graph

Works this paper leans on

219 extracted references · 64 canonical work pages · 54 internal anchors

  1. [29]

    S., 1975, , https://ui.adsabs.harvard.edu/abs/1975S&T....49..344H 49, 344

    Heeschen D. S., 1975, , https://ui.adsabs.harvard.edu/abs/1975S&T....49..344H 49, 344

    1975

  2. [35]

    J., Perola G

    Jaffe W. J., Perola G. C., 1973, , https://ui.adsabs.harvard.edu/abs/1973A&A....26..423J 26, 423

    1973

  3. [38]

    Jonas J., 2009, in Panoramic Radio Astronomy: Wide-field 1-2 GHz Research on Galaxy Evolution. p. 4

    2009

  4. [42]

    S., 1962, , https://ui.adsabs.harvard.edu/abs/1962SvA.....6..317K 6, 317

    Kardashev N. S., 1962, , https://ui.adsabs.harvard.edu/abs/1962SvA.....6..317K 6, 317

    1962

  5. [44]

    S., Gubanov A

    Komissarov S. S., Gubanov A. G., 1994, , https://ui.adsabs.harvard.edu/abs/1994A&A...285...27K 285, 27

    1994

  6. [48]

    Lazio T. J. W., Kassim N. E., Weiler K., Gross C. A., 1999, in American Astronomical Society Meeting Abstracts. p. 83.06

    1999

  7. [56]

    Mohan N., Rafferty D., 2015, PyBDSF: Python Blob Detection and Source Finder , Astrophysics Source Code Library, record ascl:1502.007 ( @eprint ascl 1502.007 )

    2015

  8. [62]

    J., 2012, Bulletin of the Astronomical Society of India, https://ui.adsabs.harvard.edu/abs/2012BASI...40..121N 40, 121

    Nandi S., Saikia D. J., 2012, Bulletin of the Astronomical Society of India, https://ui.adsabs.harvard.edu/abs/2012BASI...40..121N 40, 121

    2012

  9. [63]

    J., Green D

    Nityananda R., 2009, in Saikia D. J., Green D. A., Gupta Y., Venturi T., eds, Astronomical Society of the Pacific Conference Series Vol. 407, The Low-Frequency Radio Universe. p. 389

    2009

  10. [75]

    J., Jamrozy M., 2009, Bulletin of the Astronomical Society of India, https://ui.adsabs.harvard.edu/abs/2009BASI...37...63S 37, 63

    Saikia D. J., Jamrozy M., 2009, Bulletin of the Astronomical Society of India, https://ui.adsabs.harvard.edu/abs/2009BASI...37...63S 37, 63

    2009

  11. [79]

    Sethi S., Jamrozy M., Ku \'z micz A., 2022, in EAS2022, European Astronomical Society Annual Meeting. p. 2173

    2022

  12. [87]

    J., Perley R

    Swarup G., 1991, in Cornwell T. J., Perley R. A., eds, Astronomical Society of the Pacific Conference Series Vol. 19, IAU Colloq. 131: Radio Interferometry. Theory, Techniques, and Applications. pp 376--380

    1991

  13. [89]

    R., 2019, in 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)

    Taylor A. R., 2019, in 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC). pp 1--1, @doi 10.23919/URSIAP-RASC.2019.8738702

    work page doi:10.23919/ursiap-rasc.2019.8738702 2019

  14. [94]

    Vaccari M., 2026, @doi [Research Notes of the American Astronomical Society] 10.3847/2515-5172/ae6a9a , https://ui.adsabs.harvard.edu/abs/2026RNAAS..10..118V 10, 118

    doi:10.3847/2515-5172/ae6a9a 2026

  15. [96]

    The XXL Survey. XX. The 365 cluster catalogue. , keywords =. doi:10.1051/0004-6361/201731606 , archivePrefix =. 1810.03849 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/201731606

  16. [97]

    The total rest-frame UV luminosity function from $3 < z < 5$: A simultaneous study of AGN and galaxies from $-28<M_{\rm UV}<-16$

    The total rest-frame UV luminosity function from 3 < z < 5: a simultaneous study of AGN and galaxies from -28 < M _ UV < -16. , keywords =. doi:10.1093/mnras/stad1333 , archivePrefix =. 2207.09342 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1093/mnras/stad1333

  17. [98]

    , keywords =

    Second data release of the Hyper Suprime-Cam Subaru Strategic Program. , keywords =. doi:10.1093/pasj/psz103 , archivePrefix =. 1905.12221 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/pasj/psz103 1905

  18. [99]

    , keywords =

    The Hyper Suprime-Cam SSP Survey: Overview and survey design. , keywords =. doi:10.1093/pasj/psx066 , archivePrefix =. 1704.05858 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/pasj/psx066

  19. [100]

    , keywords =

    The 16th Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra. , keywords =. doi:10.3847/1538-4365/ab929e , archivePrefix =. 1912.02905 , primaryClass =

    doi:10.3847/1538-4365/ab929e 1912

  20. [101]

    , keywords =

    First data release of the Hyper Suprime-Cam Subaru Strategic Program. , keywords =. doi:10.1093/pasj/psx081 , archivePrefix =. 1702.08449 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/pasj/psx081

  21. [102]

    The Lifetime and Powers of FR IIs in Galaxy Clusters

    The Lifetime and Powers of FR IIs in Galaxy Clusters. , keywords =. doi:10.1088/0004-637X/756/2/116 , archivePrefix =. 1204.3896 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/0004-637x/756/2/116

  22. [103]

    , keywords =

    The Dynamic Evolution of Young Extragalactic Radio Sources. , keywords =. doi:10.1088/0004-637X/760/1/77 , archivePrefix =. 1211.1760 , primaryClass =

    Pith/arXiv arXiv doi:10.1088/0004-637x/760/1/77

  23. [104]

    , keywords =

    The Astropy Project: Building an Open-science Project and Status of the v2.0 Core Package. , keywords =. doi:10.3847/1538-3881/aabc4f , archivePrefix =. 1801.02634 , primaryClass =

    Pith/arXiv arXiv doi:10.3847/1538-3881/aabc4f

  24. [105]

    , keywords =

    Radio-Far-infrared Correlation in Blue Cloud Galaxies with 0 < z < 1.2. , keywords =. doi:10.1088/0004-637X/803/2/51 , archivePrefix =. 1502.00330 , primaryClass =

    Pith/arXiv arXiv doi:10.1088/0004-637x/803/2/51

  25. [106]

    , keywords =

    The Nature and Evolution of Classical Double Radio Sources from Complete Samples. , keywords =. doi:10.1086/300721 , archivePrefix =. astro-ph/9810197 , primaryClass =

    Pith/arXiv arXiv doi:10.1086/300721

  26. [107]

    American Astronomical Society Meeting Abstracts , year = 1995, series =

    High Fidelity Interferometric Imaging: Robust Weighting and NNLS Deconvolution. American Astronomical Society Meeting Abstracts , year = 1995, series =

    1995

  27. [108]

    , keywords =

    Extragalactic Peaked-spectrum Radio Sources at Low Frequencies. , keywords =. doi:10.3847/1538-4357/836/2/174 , archivePrefix =. 1701.02771 , primaryClass =

    Pith/arXiv arXiv doi:10.3847/1538-4357/836/2/174

  28. [109]

    arXiv e-prints , keywords =

    The Pan-STARRS1 Surveys. arXiv e-prints , keywords =

  29. [110]

    , keywords =

    The XMM-SERVS survey: new XMM-Newton point-source catalogue for the XMM-LSS field. , keywords =. doi:10.1093/mnras/sty1036 , archivePrefix =. 1804.07763 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/sty1036

  30. [111]

    The Low Frequency Radio Counterpart of the XMM Large Scale Structure Survey

    The Low-Frequency Radio Counterpart of the XMM Large-Scale Structure Survey. , keywords =. doi:10.1086/375397 , archivePrefix =. astro-ph/0303419 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/375397

  31. [112]

    A Deep, High-Resolution Survey at 74 MHz

    A Deep, High-Resolution Survey at 74 MHz. , keywords =. doi:10.1086/380783 , archivePrefix =. astro-ph/0310521 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/380783

  32. [113]

    The PRIsm MUlti-object Survey (PRIMUS). II. Data Reduction and Redshift Fitting. , keywords =. doi:10.1088/0004-637X/767/2/118 , archivePrefix =. 1303.2672 , primaryClass =

    Pith/arXiv arXiv doi:10.1088/0004-637x/767/2/118

  33. [114]

    , keywords =

    The VLA Low-Frequency Sky Survey. , keywords =. doi:10.1086/520719 , archivePrefix =. 0706.1191 , primaryClass =

    Pith/arXiv arXiv doi:10.1086/520719

  34. [115]

    Photometric redshifts for the CFHTLS T0004 Deep and Wide fields

    Photometric redshifts for the CFHTLS T0004 deep and wide fields. , keywords =. doi:10.1051/0004-6361/200811413 , archivePrefix =. 0811.3326 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/200811413

  35. [116]

    , keywords =

    IC 2476 : a possible relic radio galaxy. , keywords =. doi:10.1093/mnras/227.3.695 , adsurl =

    work page doi:10.1093/mnras/227.3.695

  36. [117]

    , keywords =

    Deep Extragalactic VIsible Legacy Survey (DEVILS): motivation,design, and target catalogue. , keywords =. doi:10.1093/mnras/sty1553 , archivePrefix =. 1806.05808 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/sty1553

  37. [118]

    , keywords =

    The non-thermal emission of extended radio galaxy lobes with curved electron spectra. , keywords =. doi:10.1111/j.1365-2966.2011.20239.x , archivePrefix =. 1111.4878 , primaryClass =

    doi:10.1111/j.1365-2966.2011.20239.x 2011

  38. [119]

    The remnant radio galaxy associated with NGC 1534

    The remnant radio galaxy associated with NGC 1534. , keywords =. doi:10.1017/pasa.2018.26 , archivePrefix =. 1806.09255 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1017/pasa.2018.26 2018

  39. [120]

    Search and characterization of remnant radio galaxies in the XMM$-$LSS deep field

    Search and Characterization of Remnant Radio Galaxies in the XMM-LSS Deep Field. , keywords =. doi:10.3847/1538-4357/acaf01 , archivePrefix =. 2212.10133 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.3847/1538-4357/acaf01

  40. [121]

    Characteristics of remnant radio galaxies detected in the deep radio continuum observations from the SKA pathfinders

    Characteristics of remnant radio galaxies detected in deep radio continuum observations from SKA pathfinders. Journal of Astrophysics and Astronomy , keywords =. doi:10.1007/s12036-022-09883-y , archivePrefix =. 2207.07871 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1007/s12036-022-09883-y

  41. [122]

    The diffuse radio emission around NGC 5580 and NGC 5588

    The diffuse radio emission around NGC 5580 and NGC 5588. , keywords =. doi:10.1093/mnras/stu360 , archivePrefix =. 1402.5528 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1093/mnras/stu360

  42. [123]

    , keywords =

    CFHTLenS: the Canada-France-Hawaii Telescope Lensing Survey - imaging data and catalogue products. , keywords =. doi:10.1093/mnras/stt928 , archivePrefix =. 1210.8156 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/stt928

  43. [124]

    Monitoring the Bi-Directional Relativistic Jets of the Radio Galaxy 3C 338

    Monitoring the Bidirectional Relativistic Jets of the Radio Galaxy 3C 338. , keywords =. doi:10.1086/512479 , archivePrefix =. astro-ph/0612233 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/512479

  44. [125]

    First Data Release of 57 204 spectroscopic measurements

    The VIMOS Public Extragalactic Survey (VIPERS). First Data Release of 57 204 spectroscopic measurements. , keywords =. doi:10.1051/0004-6361/201322790 , archivePrefix =. 1310.1008 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/201322790

  45. [126]

    Information Handling in Astronomy - Historical Vistas , year = 2003, editor =

    AIPS, the VLA, and the VLBA. Information Handling in Astronomy - Historical Vistas , year = 2003, editor =. doi:10.1007/0-306-48080-8\_7 , adsurl =

    doi:10.1007/0-306-48080-8 2003

  46. [127]

    , keywords =

    Spectral ageing in the lobes of cluster-centre FR II radio galaxies. , keywords =. doi:10.1093/mnras/stv2194 , archivePrefix =. 1509.06757 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/stv2194

  47. [128]

    , keywords =

    Spectral ageing in the lobes of FR-II radio galaxies: new methods of analysis for broad-band radio data. , keywords =. doi:10.1093/mnras/stt1526 , archivePrefix =. 1308.4137 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/stt1526

  48. [129]

    , keywords =

    The properties of powerful radio sources at 90 GHz. , keywords =. doi:10.1111/j.1365-2966.2008.13370.x , archivePrefix =. 0804.3369 , primaryClass =

    doi:10.1111/j.1365-2966.2008.13370.x 2008

  49. [130]

    , keywords =

    Radio galaxies and feedback from AGN jets. , keywords =. doi:10.1016/j.newar.2020.101539 , archivePrefix =. 2003.06137 , primaryClass =

    doi:10.1016/j.newar.2020.101539 2020

  50. [131]

    , keywords =

    MIGHTEE: total intensity radio continuum imaging and the COSMOS/XMM-LSS Early Science fields. , keywords =. doi:10.1093/mnras/stab3021 , archivePrefix =. 2110.00347 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/stab3021

  51. [132]

    Ionospheric calibration of low frequency radio interferometric observations using the peeling scheme. I. Method description and first results. , keywords =. doi:10.1051/0004-6361/200811094 , archivePrefix =. 0904.3975 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/200811094

  52. [133]

    First alternative data release TGSS ADR1

    The GMRT 150 MHz all-sky radio survey. First alternative data release TGSS ADR1. , keywords =. doi:10.1051/0004-6361/201628536 , archivePrefix =. 1603.04368 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/201628536

  53. [134]

    , keywords =

    Deep GMRT 150-MHz observations of the LBDS-Lynx region: ultrasteep spectrum radio sources. , keywords =. doi:10.1111/j.1365-2966.2010.16452.x , archivePrefix =. 1002.0691 , primaryClass =

    doi:10.1111/j.1365-2966.2010.16452.x 2010

  54. [135]

    Astronomical Data Analysis Software and Systems XII , year = 2003, editor =

    New Features of SAOImage DS9. Astronomical Data Analysis Software and Systems XII , year = 2003, editor =

    2003

  55. [136]

    Multi-frequency characterisation of remnant radio galaxies in the Lockman Hole field

    Multi-frequency characterisation of remnant radio galaxies in the Lockman Hole field. , keywords =. doi:10.1051/0004-6361/202040102 , archivePrefix =. 2106.13161 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/202040102

  56. [137]

    MeerKAT Science: On the Pathway to the SKA , year = 2016, month = jan, eid =

    The MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Survey. MeerKAT Science: On the Pathway to the SKA , year = 2016, month = jan, eid =. doi:10.22323/1.277.0006 , archivePrefix =. 1709.01901 , primaryClass =

    Pith/arXiv arXiv doi:10.22323/1.277.0006 2016

  57. [138]

    , keywords =

    The life cycle of radio galaxies in the LOFAR Lockman Hole field. , keywords =. doi:10.1051/0004-6361/201936955 , archivePrefix =. 2004.09118 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/201936955 2004

  58. [139]

    , keywords =

    Numerical modelling of the lobes of radio galaxies in cluster environments. , keywords =. doi:10.1093/mnras/sts564 , archivePrefix =. 1301.2531 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/sts564

  59. [140]

    , keywords =

    New insights on the z-- correlation from complete radio samples. , keywords =. doi:10.1111/j.1365-2966.2011.20235.x , archivePrefix =. 1111.5244 , primaryClass =

    doi:10.1111/j.1365-2966.2011.20235.x 2011

  60. [141]

    , keywords =

    The Discovery of a Remnant Radio Galaxy in A2065 Using GMRT. , keywords =. doi:10.3847/1538-4357/ac042d , adsurl =

    doi:10.3847/1538-4357/ac042d

  61. [142]

    , keywords =

    The Lockman Hole project: LOFAR observations and spectral index properties of low-frequency radio sources. , keywords =. doi:10.1093/mnras/stw2225 , archivePrefix =. 1609.00537 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/stw2225

  62. [143]

    , keywords =

    LOFAR: The LOw-Frequency ARray. , keywords =. doi:10.1051/0004-6361/201220873 , archivePrefix =. 1305.3550 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/201220873

  63. [144]

    , keywords =

    A search for steep spectrum radio relics and halos with the GMRT. , keywords =. doi:10.1051/0004-6361/200912501 , archivePrefix =. 0910.2970 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/200912501

  64. [145]

    Relic orientations, cluster X-ray luminosity, and redshift distributions

    Radio continuum observations of new radio halos and relics from the NVSS and WENSS surveys. Relic orientations, cluster X-ray luminosity, and redshift distributions. , keywords =. doi:10.1051/0004-6361/201117149 , archivePrefix =. 1107.5597 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/201117149

  65. [146]

    , keywords =

    The death of FR II radio sources and their connection with radio relics. , keywords =. doi:10.1046/j.1365-8711.2002.05799.x , archivePrefix =. astro-ph/0201288 , primaryClass =

    doi:10.1046/j.1365-8711.2002.05799.x 2002

  66. [147]

    , keywords =

    Particle acceleration and dynamics of double-double radio galaxies: theory versus observations. , keywords =. doi:10.1093/mnras/stt1676 , archivePrefix =. 1309.1401 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/stt1676

  67. [148]

    , keywords =

    The Very Large Array Low-frequency Sky Survey Redux (VLSSr). , keywords =. doi:10.1093/mnras/stu256 , archivePrefix =. 1404.0694 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/stu256

  68. [149]

    Jansky Very Large Array Sky Survey (VLASS)

    The Karl G. Jansky Very Large Array Sky Survey (VLASS). Science Case and Survey Design. , keywords =. doi:10.1088/1538-3873/ab63eb , archivePrefix =. 1907.01981 , primaryClass =

    doi:10.1088/1538-3873/ab63eb 1907

  69. [150]

    , keywords =

    The VIMOS VLT Deep Survey final data release: a spectroscopic sample of 35 016 galaxies and AGN out to z -0.5ex 6.7 selected with 17.5 i _ AB 24.75. , keywords =. doi:10.1051/0004-6361/201322179 , archivePrefix =. 1307.0545 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/201322179

  70. [151]

    , keywords =

    The VIMOS Ultra-Deep Survey: -0.5ex 10 000 galaxies with spectroscopic redshifts to study galaxy assembly at early epochs 2 < z ≃ 6. , keywords =. doi:10.1051/0004-6361/201423829 , archivePrefix =. 1403.3938 , primaryClass =

    Pith/arXiv arXiv doi:10.1051/0004-6361/201423829

  71. [152]

    IEEE Proceedings , keywords =

    The Murchison Widefield Array: Design Overview. IEEE Proceedings , keywords =. doi:10.1109/JPROC.2009.2017564 , archivePrefix =. 0903.1828 , primaryClass =

    doi:10.1109/jproc.2009.2017564 2009

  72. [153]

    , keywords =

    SWIRE: The SIRTF Wide-Area Infrared Extragalactic Survey. , keywords =. doi:10.1086/376850 , archivePrefix =. astro-ph/0305375 , primaryClass =

    Pith/arXiv arXiv doi:10.1086/376850

  73. [154]

    J1420--0545: The radio galaxy larger than 3C236

    J1420-0545: The Radio Galaxy Larger than 3C 236. , keywords =. doi:10.1086/586703 , archivePrefix =. 0808.2742 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/586703

  74. [155]

    , keywords =

    Remnant radio-loud AGN in the Herschel-ATLAS field. , keywords =. doi:10.1093/mnras/sty025 , archivePrefix =. 1801.01067 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/mnras/sty025

  75. [156]

    , keywords =

    The Spitzer Extragalactic Representative Volume Survey (SERVS): Survey Definition and Goals. , keywords =. doi:10.1086/666945 , archivePrefix =. 1206.4060 , primaryClass =

    Pith/arXiv arXiv doi:10.1086/666945

  76. [157]

    PyBDSF: Python Blob Detection and Source Finder

  77. [158]

    Nature Astronomy , keywords =

    Archaeology of active galaxies across the electromagnetic spectrum. Nature Astronomy , keywords =. doi:10.1038/s41550-017-0223-0 , archivePrefix =. 1709.01667 , primaryClass =

    Pith/arXiv arXiv doi:10.1038/s41550-017-0223-0

  78. [159]

    Bulletin of the Astronomical Society of India , keywords =

    Double-double radio galaxies from the FIRST survey. Bulletin of the Astronomical Society of India , keywords =

  79. [160]

    arXiv e-prints , keywords =

    Photometric Redshifts for the Hyper Suprime-Cam Subaru Strategic Program Data Release 2. arXiv e-prints , keywords =

  80. [161]

    , keywords =

    An optically-selected cluster catalog at redshift 0.1 < z < 1.1 from the Hyper Suprime-Cam Subaru Strategic Program S16A data. , keywords =. doi:10.1093/pasj/psx042 , archivePrefix =. 1701.00818 , primaryClass =

    Pith/arXiv arXiv doi:10.1093/pasj/psx042

Showing first 80 references.