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arxiv: 2605.17636 · v1 · pith:GVXLKOJ2new · submitted 2026-05-17 · 🌌 astro-ph.HE

Diffuse gamma-ray emission in the vicinity of open cluster Berkeley 87

Ziwei Ou , Xiaolong Yang This is my paper

Pith reviewed 2026-05-19 22:12 UTC · model grok-4.3

classification 🌌 astro-ph.HE
keywords diffuse gamma-ray emissionopen cluster Berkeley 87Fermi LAThadronic processesstellar windscosmic ray accelerationyoung massive clusters
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The pith

Fermi observations detect diffuse gamma-ray emission near the open cluster Berkeley 87.

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

The paper establishes the presence of extended gamma-ray emission in the direction of the young massive star cluster Berkeley 87, measured with an angular size of 0.36 degrees and a photon index of 2.68. The authors link this signal to the cluster by noting its coincidence with dense gas and the strong stellar winds that can accelerate cosmic rays. A sympathetic reader would see this as evidence that such clusters act as sites of hadronic gamma-ray production, where cosmic rays collide with surrounding material to generate the observed photons. This adds a concrete example to the catalog of galactic gamma-ray sources tied to star formation rather than isolated supernovae.

Core claim

We report the detection of diffuse gamma-ray emission toward the young massive star cluster Berkeley 87 using Fermi data. The emission has an angular extension of 0.36 degree and a photon index of 2.68. The hadronic scenario is favored given the dense gas and the cluster's strong stellar winds.

What carries the argument

Morphological and spectral analysis of Fermi-LAT data that identifies an extended source with 0.36-degree angular size and a power-law spectrum of index 2.68, interpreted through the cluster's gas density and wind-driven particle acceleration.

If this is right

  • Cosmic rays accelerated by the cluster's stellar winds interact with dense gas to produce the observed gamma rays through hadronic collisions.
  • The soft spectrum with index 2.68 is consistent with pion-decay emission rather than purely leptonic processes.
  • Other young massive clusters with similar gas and wind conditions are expected to produce detectable diffuse gamma-ray halos.
  • Berkeley 87 joins the set of galactic sources where star-cluster environments contribute to the diffuse gamma-ray sky.

Where Pith is reading between the lines

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

  • Clusters like Berkeley 87 may supply a non-negligible fraction of galactic cosmic rays at GeV energies beyond the usual supernova remnant contribution.
  • Cross-correlation with molecular gas maps at radio or infrared wavelengths could test whether the gamma-ray intensity scales directly with target gas density.
  • Time-domain monitoring for variability would help rule out transient sources that might mimic steady cluster emission.

Load-bearing premise

The detected gamma rays are physically connected to Berkeley 87 instead of arising from unrelated background sources or data artifacts, and the cluster's dense gas plus stellar winds are enough to favor hadronic production without full modeling of other possibilities.

What would settle it

Multi-wavelength mapping that shows the gamma-ray excess lacks spatial overlap with the cluster's gas or wind features, or higher-resolution data revealing a separate point source or different spectral shape that accounts for the entire signal.

Figures

Figures reproduced from arXiv: 2605.17636 by Xiaolong Yang, Ziwei Ou.

Figure 1
Figure 1. Figure 1: 𝛾-ray count map above 10 GeV in the 5 ◦ × 5 ◦ region around Berkeley 87 [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: 2 ◦ × 2 ◦ TS map. The estimated radius of 4FGL J2022.6+3716 is shown. The position of For obtaining TSext, we adopt radial Gaussian and radial disk to model the spatial extension of Berkeley 87. The extension fitting find 0.36 ± 0.07◦ and 0.29 ± 0.08◦ for 2D radial Gaussian and 2D radial disk, respectively ( [PITH_FULL_IMAGE:figures/full_fig_p002_2.png] view at source ↗
Figure 4
Figure 4. Figure 4: PSR J2021+3651 timing results from Tempo2 with the Fermi plug￾in. Top-left panel: phase histogram of the analyzed Fermi-LAT data. Two full rotational phase are shown here. Bottom-left panel: H-test significance as a function of time. Right panel: pulse phase for each 𝛾-ray event vs. time. by performing a likelihood profile scan over the 68% containment and fitting for the extension which maximizes the mode… view at source ↗
Figure 5
Figure 5. Figure 5: Gas column densities in different gas phase (in unit of cm−2 ). The left panel gives the H2 column density derived from CO data. The middle panel provides the map of H I column density obtained from EBHIS survey. The right panel shows the H II column density derived from Planck 353 GHz map assuming an effective density of electron 𝑛𝑒 = 10 cm−3 . The 𝛾-ray emission is presented as green contours. 𝑀 = 𝜇𝑚H𝑑 2… view at source ↗
read the original abstract

We report the detection of diffuse gamma-ray emission toward the young massive star cluster Berkeley 87 using Fermi data. The emission has an angular extension of 0.36 degree and a photon index of 2.68. The hadronic scenario is favored given the dense gas and the cluster's strong stellar winds.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 0 minor

Summary. The manuscript reports the detection of diffuse gamma-ray emission toward the young massive star cluster Berkeley 87 using Fermi-LAT data. The emission is characterized by an angular extension of 0.36 degrees and a photon index of 2.68. The authors conclude that a hadronic production scenario is favored on the basis of the presence of dense gas and the cluster's strong stellar winds.

Significance. If the detection and association are robust, the result would add to the growing body of evidence for cosmic-ray acceleration and hadronic interactions in the environments of young star clusters. Such observations help constrain the contribution of stellar winds and supernova remnants to the galactic cosmic-ray population.

major comments (2)
  1. The central claim that the hadronic scenario is favored rests on qualitative arguments (dense gas and stellar winds) without reported calculations of the expected pion-decay gamma-ray flux using measured gas column densities or direct spectral modeling that compares the observed extension and index 2.68 against leptonic channels such as inverse-Compton or bremsstrahlung.
  2. No information is provided on the statistical significance of the detection, the background-subtraction procedure, or the energy range and fitting details that yield the reported angular extension of 0.36° and photon index of 2.68, which are load-bearing for both the detection claim and the subsequent interpretation.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the careful reading and constructive comments on our manuscript. We address each major comment below and have revised the manuscript to incorporate additional quantitative estimates and methodological details.

read point-by-point responses

  1. Referee: The central claim that the hadronic scenario is favored rests on qualitative arguments (dense gas and stellar winds) without reported calculations of the expected pion-decay gamma-ray flux using measured gas column densities or direct spectral modeling that compares the observed extension and index 2.68 against leptonic channels such as inverse-Compton or bremsstrahlung.

    Authors: We agree that quantitative calculations would strengthen the interpretation. In the revised manuscript we have added estimates of the expected pion-decay flux derived from published gas column density measurements in the Berkeley 87 region, together with a basic comparison of the observed photon index and extension against simple leptonic model expectations. These additions appear in the discussion section and acknowledge the uncertainties inherent in the gas distribution and cosmic-ray density assumptions. revision: yes

  2. Referee: No information is provided on the statistical significance of the detection, the background-subtraction procedure, or the energy range and fitting details that yield the reported angular extension of 0.36° and photon index of 2.68, which are load-bearing for both the detection claim and the subsequent interpretation.

    Authors: We acknowledge that these analysis details are necessary to assess the robustness of the reported parameters. The revised manuscript now contains an expanded methods section that specifies the energy range, background model, subtraction procedure, detection significance, and the likelihood fitting approach used to determine the angular extension and photon index. revision: yes

Circularity Check

0 steps flagged

No significant circularity in observational detection report

full rationale

This is an observational astronomy paper reporting a Fermi-LAT detection of diffuse emission toward Berkeley 87. The reported angular extension (0.36°) and photon index (2.68) are extracted directly from data analysis rather than derived from any internal model or equation. The statement favoring the hadronic scenario rests on qualitative environmental context (dense gas, stellar winds) without any self-referential fitting, parameter renaming, or load-bearing self-citation chain that reduces the central claim to its own inputs by construction. No equations, ansatzes, or uniqueness theorems appear in the provided text that would trigger the enumerated circularity patterns. The work is therefore self-contained against external Fermi data benchmarks.

Axiom & Free-Parameter Ledger

2 free parameters · 1 axioms · 0 invented entities

The central claim relies on the interpretation of Fermi data as diffuse emission associated with the cluster and the preference for hadronic over leptonic scenarios based on environmental factors.

free parameters (2)
  • angular extension = 0.36 degree
    Measured from the spatial distribution of gamma-ray events.
  • photon index = 2.68
    Fitted from the energy spectrum of the emission.
axioms (1)
  • domain assumption The gamma-ray emission originates from the vicinity of Berkeley 87
    Based on positional coincidence with the cluster.

pith-pipeline@v0.9.0 · 5563 in / 1408 out tokens · 37548 ms · 2026-05-19T22:12:22.654232+00:00 · methodology

discussion (0)

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Works this paper leans on

90 extracted references · 90 canonical work pages · 49 internal anchors

  1. [1]

    , keywords =

    Hot Gas Outflow Properties of the Starburst Galaxy NGC 4945. , keywords =. doi:10.3847/1538-4357/ad4606 , archivePrefix =. 2312.08444 , primaryClass =

    work page doi:10.3847/1538-4357/ad4606

  2. [2]

    Free-free and H42alpha emission from the dusty starburst within NGC 4945 as observed by ALMA

    Free-free and H42 emission from the dusty starburst within NGC 4945 as observed by ALMA. , keywords =. doi:10.1093/mnras/stw1659 , archivePrefix =. 1607.02304 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1093/mnras/stw1659

  3. [3]

    , keywords =

    ALMA Imaging of a Galactic Molecular Outflow in NGC 4945. , keywords =. doi:10.3847/1538-4357/ac2c08 , archivePrefix =. 2109.10437 , primaryClass =

    work page doi:10.3847/1538-4357/ac2c08

  4. [4]

    Simultaneous Chandra and RXTE observations of the nearby bright Seyfert 2 galaxy NGC4945

    Simultaneous Chandra and Rossi X-Ray Timing Explorer Observations of the Nearby Bright Seyfert 2 Galaxy NGC 4945. , keywords =. doi:10.1086/374332 , archivePrefix =. astro-ph/0301383 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/374332

  5. [5]

    The Sub-Parsec Scale Radio Properties of Southern Starburst Galaxies. II. Supernova Remnants, the Supernova Rate, and the Ionised Medium in the NGC 4945 Starburst. , keywords =. doi:10.1088/0004-6256/137/1/537 , archivePrefix =. 0811.0057 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/0004-6256/137/1/537

  6. [6]

    Spatially resolved Fe K spectroscopy of NGC 4945

    Spatially resolved Fe K spectroscopy of NGC 4945. , keywords =. doi:10.1093/mnras/stx1551 , archivePrefix =. 1706.06362 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1093/mnras/stx1551

  7. [7]

    The X/gamma-ray correlation in NGC 4945 and the nature of its gamma-ray source

    The X-/ -Ray Correlation in NGC 4945 and the Nature of Its -Ray Source. , keywords =. doi:10.3847/1538-4357/aa8f9d , archivePrefix =. 1710.01847 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.3847/1538-4357/aa8f9d

  8. [8]

    A connection between star formation activity and cosmic rays in the starburst galaxy M 82

    A connection between star formation activity and cosmic rays in the starburst galaxy M82. , keywords =. doi:10.1038/nature08557 , archivePrefix =. 0911.0873 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1038/nature08557

  9. [9]

    Cosmic ray transport and radiative processes in nuclei of starburst galaxies

    Cosmic ray transport and radiative processes in nuclei of starburst galaxies. , keywords =. doi:10.1093/mnras/stz1161 , archivePrefix =. 1812.01996 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1093/mnras/stz1161

  10. [10]

    , keywords =

    The -Ray Emission of Star-forming Galaxies. , keywords =. doi:10.3847/1538-4357/ab86a6 , archivePrefix =. 2003.05493 , primaryClass =

    work page doi:10.3847/1538-4357/ab86a6 2003

  11. [11]

    GeV Observations of Star-forming Galaxies with \textit{Fermi} LAT

    GeV Observations of Star-forming Galaxies with the Fermi Large Area Telescope. , keywords =. doi:10.1088/0004-637X/755/2/164 , archivePrefix =. 1206.1346 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/0004-637x/755/2/164

  12. [12]

    Identifying X-ray Sources in Bulge and Disk Galaxies from X-ray Colors

    Classifying X-Ray Sources in External Galaxies from X-Ray Colors. , keywords =. doi:10.1086/377366 , archivePrefix =. astro-ph/0206127 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/377366

  13. [13]

    Supernova Remnants in M33: X-ray Properties as Observed by XMM-Newton

    Supernova remnants in M33: X-ray properties as observed by XMM-Newton. , keywords =. doi:10.1093/mnras/stx1905 , archivePrefix =. 1708.01239 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1093/mnras/stx1905

  14. [14]

    , keywords =

    X-ray supernova remnants in the starburst region of M 82. , keywords =. doi:10.1051/0004-6361/202040209 , archivePrefix =. 2106.13482 , primaryClass =

    work page doi:10.1051/0004-6361/202040209

  15. [15]

    A Multiwavelength Study of Supernova Remnants in Six Nearby Galaxies. I. Detection of New X-ray-selected Supernova Remnants with Chandra. , keywords =. doi:10.1088/0004-637X/725/1/842 , archivePrefix =. 1009.0525 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/0004-637x/725/1/842

  16. [16]

    The Chandra ACIS Survey of M33: X-ray, Optical and Radio Properties of the Supernova Remnants

    The Chandra ACIS Survey of M33: X-ray, Optical, and Radio Properties of the Supernova Remnants. , keywords =. doi:10.1088/0067-0049/187/2/495 , archivePrefix =. 1002.1839 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/0067-0049/187/2/495

  17. [17]

    The population of X-ray supernova remnants in the Large Magellanic Cloud

    The population of X-ray supernova remnants in the Large Magellanic Cloud. , keywords =. doi:10.1051/0004-6361/201526932 , archivePrefix =. 1509.09223 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201526932

  18. [18]

    , keywords =

    The supernova remnant population of the Small Magellanic Cloud. , keywords =. doi:10.1051/0004-6361/201936583 , archivePrefix =. 1908.11234 , primaryClass =

    work page doi:10.1051/0004-6361/201936583 1908

  19. [19]

    Supernova remnants and candidates detected in the XMM-Newton M31 large survey

    Supernova remnants and candidates detected in the XMM-Newton M 31 large survey. , keywords =. doi:10.1051/0004-6361/201219025 , archivePrefix =. 1206.4789 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201219025

  20. [20]

    The deep XMM-Newton Survey of M 31

    The deep XMM-Newton Survey of M 31. , keywords =. doi:10.1051/0004-6361/201015270 , archivePrefix =. 1106.4755 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201015270

  21. [21]

    , keywords =

    Young Black Hole and Neutron Star Systems in the Nearby Star-forming Galaxy M33: The NuSTAR View. , keywords =. doi:10.3847/1538-4357/ac6351 , adsurl =

    work page doi:10.3847/1538-4357/ac6351

  22. [22]

    A Hard X-ray Study of the Normal Star-Forming Galaxy M83 with NuSTAR

    A Hard X-Ray Study of the Normal Star-forming Galaxy M83 with NuSTAR. , keywords =. doi:10.3847/0004-637X/824/2/107 , archivePrefix =. 1604.07441 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.3847/0004-637x/824/2/107

  23. [23]

    Coronal Abundances in Orion Nebula Cluster Stars

    Coronal Abundances in Orion Nebula Cluster Stars. , keywords =. doi:10.1086/513088 , archivePrefix =. astro-ph/0703439 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/513088

  24. [24]

    Bulgarian Astronomical Journal , keywords =

    The H-R diagram for supernova remnants. Bulgarian Astronomical Journal , keywords =

    work page

  25. [25]

    XMM-Newton survey of M 31

    An XMM-Newton survey of M 31. , keywords =. doi:10.1051/0004-6361:20041990 , archivePrefix =. astro-ph/0410117 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361:20041990

  26. [26]

    Clustered star formation toward Berkeley 87/ON2. I. Multiwavelength census and the population overlap problem. , keywords =. doi:10.1051/0004-6361/202040065 , archivePrefix =. 2103.06062 , primaryClass =

    work page doi:10.1051/0004-6361/202040065

  27. [27]

    American Astronomical Society Meeting Abstracts \#215 , year = 2010, series =

    The Origin Of Cosmic Rays And The Stars Of Berkeley 87. American Astronomical Society Meeting Abstracts \#215 , year = 2010, series =

    work page 2010

  28. [28]

    High Energy Gamma-Ray Astronomy: International Symposium , year = 2001, editor =

    Search for TeV -ray Emission from the Open Star Cluster Berkeley 87. High Energy Gamma-Ray Astronomy: International Symposium , year = 2001, editor =. doi:10.1063/1.1370873 , adsurl =

    work page doi:10.1063/1.1370873 2001

  29. [29]

    , eprint =

    The Milky Way in Molecular Clouds: A New Complete CO Survey. , keywords =. doi:10.1086/318388 , archivePrefix =. astro-ph/0009217 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/318388

  30. [30]

    Chandra Detects the Rare Oxygen-type Wolf-Rayet Star WR 142 and OB Stars in Berkeley 87

    Chandra Detects the Rare Oxygen-type Wolf-Rayet Star WR 142 and OB Stars in Berkeley 87. , keywords =. doi:10.1088/0004-637X/715/2/1327 , archivePrefix =. 1004.0462 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/0004-637x/715/2/1327

  31. [31]

    and LHAASO

    Young Massive Star Clusters as TeV Emitters: Constraints from H.E.S.S. and LHAASO. arXiv e-prints , keywords =

    work page

  32. [32]

    , keywords =

    -ray production in young open clusters: Berk 87, Cyg OB2 and Westerlund 2. , keywords =. doi:10.1111/j.1365-2966.2007.12373.x , archivePrefix =. 0704.3517 , primaryClass =

    work page doi:10.1111/j.1365-2966.2007.12373.x 2007

  33. [33]

    Discovery of TeV Gamma-Ray Emission from the Cygnus Region of the Galaxy

    Discovery of TeV Gamma-Ray Emission from the Cygnus Region of the Galaxy. , keywords =. doi:10.1086/513696 , archivePrefix =. astro-ph/0611691 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/513696

  34. [34]

    , keywords =

    The Third EGRET Catalog of High-Energy Gamma-Ray Sources. , keywords =. doi:10.1086/313231 , adsurl =

    work page doi:10.1086/313231

  35. [35]

    KOSMA ^ 13 CO 2 to 1, 3 to 2, and ^ 12 CO 3 to 2 imaging

    A new view of the Cygnus X region. KOSMA ^ 13 CO 2 to 1, 3 to 2, and ^ 12 CO 3 to 2 imaging. , keywords =. doi:10.1051/0004-6361:20065088 , adsurl =

    work page doi:10.1051/0004-6361:20065088

  36. [36]

    The Fermi LAT view of the colliding wind binaries

    The Fermi-LAT view of the colliding wind binaries. , keywords =. doi:10.1093/mnrasl/slv205 , archivePrefix =. 1510.03885 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1093/mnrasl/slv205

  37. [37]

    , keywords =

    Stellar wind bubbles of OB stars as Galactic cosmic ray re-accelerators. , keywords =. doi:10.1093/mnras/stae870 , archivePrefix =. 2403.18484 , primaryClass =

    work page doi:10.1093/mnras/stae870

  38. [38]

    Nonthermal particles and photons in starburst regions and superbubbles

    Nonthermal particles and photons in starburst regions and superbubbles. , keywords =. doi:10.1007/s00159-014-0077-8 , archivePrefix =. 1511.04608 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1007/s00159-014-0077-8

  39. [39]

    Gamma-ray emission from Wolf-Rayet binaries

    Gamma-ray emission from Wolf-Rayet binaries. , keywords =. doi:10.1051/0004-6361:20021854 , archivePrefix =. astro-ph/0205375 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361:20021854

  40. [40]

    Gamma-rays and neutrinos from dense environment of massive binary systems in open clusters

    Gamma rays and neutrinos from dense environment of massive binary systems in open clusters. , keywords =. doi:10.1103/PhysRevD.90.103008 , archivePrefix =. 1410.7553 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1103/physrevd.90.103008

  41. [41]

    , keywords =

    Carinae: a very large hadron collider. , keywords =. doi:10.1051/0004-6361/201015590 , adsurl =

    work page doi:10.1051/0004-6361/201015590

  42. [42]

    Diffuse gamma-ray emission in the vicinity of young star cluster Westerlund 2

    Diffuse -ray emission in the vicinity of young star cluster Westerlund 2. , keywords =. doi:10.1051/0004-6361/201732045 , archivePrefix =. 1710.02803 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201732045

  43. [43]

    Discovery of extended VHE \gamma-ray emission from the vicinity of the young massive stellar cluster Westerlund 1

    Discovery of extended VHE -ray emission from the vicinity of the young massive stellar cluster Westerlund 1. , keywords =. doi:10.1051/0004-6361/201117928 , archivePrefix =. 1111.2043 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201117928 2043

  44. [44]

    Embedded star clusters as sources of high-energy cosmic rays: Modelling and constraints

    Embedded star clusters as sources of high-energy cosmic rays . Modelling and constraints. , keywords =. doi:10.1051/0004-6361/201628465 , archivePrefix =. 1605.04202 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201628465

  45. [45]

    Massive Stars as Major Factories of Galactic Cosmic Rays

    Massive stars as major factories of Galactic cosmic rays. Nature Astronomy , keywords =. doi:10.1038/s41550-019-0724-0 , archivePrefix =. 1804.02331 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1038/s41550-019-0724-0

  46. [46]

    , keywords =

    Probing the sea of galactic cosmic rays with Fermi-LAT. , keywords =. doi:10.1103/PhysRevD.101.083018 , archivePrefix =. 1811.12118 , primaryClass =

    work page doi:10.1103/physrevd.101.083018

  47. [47]

    , keywords =

    Contribution of young massive stellar clusters to the Galactic diffuse -ray emission. , keywords =. doi:10.1051/0004-6361/202450621 , archivePrefix =. 2406.04087 , primaryClass =

    work page doi:10.1051/0004-6361/202450621

  48. [48]

    , keywords =

    Particle acceleration in winds of star clusters. , keywords =. doi:10.1093/mnras/stab690 , archivePrefix =. 2102.09217 , primaryClass =

    work page doi:10.1093/mnras/stab690

  49. [49]

    , keywords =

    Cosmic rays from massive star clusters: a close look at Westerlund 1. , keywords =. doi:10.1093/mnras/stac023 , archivePrefix =. 2201.00529 , primaryClass =

    work page doi:10.1093/mnras/stac023

  50. [50]

    , keywords =

    Cosmic rays and gamma-rays from OB stars. , keywords =. doi:10.1086/159623 , adsurl =

    work page doi:10.1086/159623

  51. [51]

    , keywords =

    High-Energy Particles and Radiation in Star-Forming Regions. , keywords =. doi:10.1007/s11214-020-00663-0 , archivePrefix =. 2003.11534 , primaryClass =

    work page doi:10.1007/s11214-020-00663-0 2003

  52. [52]

    Non-thermal high-energy emission from colliding winds of massive stars

    Nonthermal High-Energy Emission from Colliding Winds of Massive Stars. , keywords =. doi:10.1086/503598 , archivePrefix =. astro-ph/0510701 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/503598

  53. [53]

    High-energy gamma-rays from stellar associations

    High-Energy Gamma Rays from Stellar Associations. , keywords =. doi:10.1086/381803 , archivePrefix =. astro-ph/0312128 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/381803

  54. [54]

    First bounds on the high-energy emission from isolated Wolf-Rayet binary systems

    First Bounds on the High-Energy Emission from Isolated Wolf-Rayet Binary Systems. , keywords =. doi:10.1086/592433 , archivePrefix =. 0808.1832 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/592433

  55. [55]

    R., Smartt, S

    GeV gamma-rays and TeV neutrinos from very massive compact binary systems: the case of WR 20a. , keywords =. doi:10.1111/j.1745-3933.2005.00081.x , archivePrefix =. astro-ph/0507565 , primaryClass =

    work page doi:10.1111/j.1745-3933.2005.00081.x 2005

  56. [56]

    Science , keywords =

    A Cocoon of Freshly Accelerated Cosmic Rays Detected by Fermi in the Cygnus Superbubble. Science , keywords =. doi:10.1126/science.1210311 , adsurl =

    work page doi:10.1126/science.1210311

  57. [57]

    Fermi-LAT upper limits on gamma-ray emission from colliding wind binaries

    Fermi-LAT upper limits on gamma-ray emission from colliding wind binaries. , keywords =. doi:10.1051/0004-6361/201220502 , archivePrefix =. 1308.2573 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201220502

  58. [58]

    , keywords =

    Carinae with Fermi-LAT: two full orbits and the third periastron. , keywords =. doi:10.1051/0004-6361/202140451 , archivePrefix =. 2109.05950 , primaryClass =

    work page doi:10.1051/0004-6361/202140451

  59. [59]

    Fermi Large Area Telescope Observation of a Gamma-ray Source at the Position of Eta Carinae

    Fermi Large Area Telescope Observation of a Gamma-ray Source at the Position of Eta Carinae. , keywords =. doi:10.1088/0004-637X/723/1/649 , archivePrefix =. 1008.3235 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/0004-637x/723/1/649

  60. [60]

    The Balloon-Borne Large Aperture Submillimeter Telescope (BLAST) 2005: A 10 deg^2 Survey of Star Formation in Cygnus X

    The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) 2005: A 10 deg ^ 2 Survey of Star Formation in Cygnus X. , keywords =. doi:10.1088/0004-637X/727/2/114 , archivePrefix =. 1009.2972 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/0004-637x/727/2/114 2005

  61. [61]

    , keywords =

    Evidence of an interacting stellar wind and possible high energy emissionin the open cluster Berkeley 87. , keywords =

    work page

  62. [62]

    The Effelsberg-Bonn HI Survey: Milky Way gas. First data release

    The Effelsberg-Bonn H I Survey: Milky Way gas. First data release. , keywords =. doi:10.1051/0004-6361/201527007 , archivePrefix =. 1512.05348 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201527007

  63. [63]

    A Full-Sky H-alpha Template for Microwave Foreground Prediction

    A Full-Sky H Template for Microwave Foreground Prediction. , keywords =. doi:10.1086/374411 , archivePrefix =. astro-ph/0301558 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/374411

  64. [64]

    Planck 2015 results. X. Diffuse component separation: Foreground maps. , keywords =. doi:10.1051/0004-6361/201525967 , archivePrefix =. 1502.01588 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201525967 2015

  65. [65]

    The CO-to-H2 Conversion Factor

    The CO-to-H _ 2 Conversion Factor. , keywords =. doi:10.1146/annurev-astro-082812-140944 , archivePrefix =. 1301.3498 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1146/annurev-astro-082812-140944

  66. [66]

    Parametrization of gamma-ray production cross-sections for pp interactions in a broad proton energy range from the kinematic threshold to PeV energies

    Parametrization of gamma-ray production cross sections for p p interactions in a broad proton energy range from the kinematic threshold to PeV energies. , keywords =. doi:10.1103/PhysRevD.90.123014 , archivePrefix =. 1406.7369 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1103/physrevd.90.123014

  67. [67]

    Radio to Gamma-Ray Emission from Shell-type Supernova Remnants: Predictions from Non-linear Shock Acceleration Models

    Radio to Gamma-Ray Emission from Shell-Type Supernova Remnants: Predictions from Nonlinear Shock Acceleration Models. , keywords =. doi:10.1086/306829 , archivePrefix =. astro-ph/9810158 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/306829

  68. [68]

    naima: a Python package for inference of relativistic particle energy distributions from observed nonthermal spectra

    Naima: a Python package for inference of particle distribution properties from nonthermal spectra. 34th International Cosmic Ray Conference (ICRC2015) , year = 2015, series =. doi:10.22323/1.236.0922 , archivePrefix =. 1509.03319 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.22323/1.236.0922 2015

  69. [69]

    2020, ApJS, 247, 33, doi: 10.3847/1538-4365/ab6bcb

    Fermi Large Area Telescope Fourth Source Catalog. , keywords =. doi:10.3847/1538-4365/ab6bcb , archivePrefix =. 1902.10045 , primaryClass =

    work page doi:10.3847/1538-4365/ab6bcb 1902

  70. [70]

    Classification and Ranking of Fermi LAT Gamma-ray Sources from the 3FGL Catalog using Machine Learning Techniques

    Classification and Ranking of Fermi LAT Gamma-ray Sources from the 3FGL Catalog using Machine Learning Techniques. , keywords =. doi:10.3847/0004-637X/820/1/8 , archivePrefix =. 1602.00385 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.3847/0004-637x/820/1/8

  71. [71]

    Hunting for treasures among the Fermi unassociated sources: a multi-wavelength approach

    Hunting for Treasures among the Fermi Unassociated Sources: A multiwavelength Approach. , keywords =. doi:10.1088/0004-637X/779/2/133 , archivePrefix =. 1310.6735 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/0004-637x/779/2/133

  72. [72]

    , keywords =

    Searches for pulsar-like candidates from unidentified objects in the Third Catalog of Hard Fermi-LAT Sources with machine learning techniques. , keywords =. doi:10.1093/mnras/staa1113 , archivePrefix =. 2004.10945 , primaryClass =

    work page doi:10.1093/mnras/staa1113 2004

  73. [73]

    , keywords =

    Discovery of an extended GeV counterpart to the TeV source 1LHAASO J1945+2424 in Fermi-LAT data. , keywords =. doi:10.1093/mnras/stad3739 , archivePrefix =. 2312.01449 , primaryClass =

    work page doi:10.1093/mnras/stad3739

  74. [74]

    Disentangling multiple high-energy emission components in the Vela X pulsar wind nebula with the Fermi Large Area Telescope

    Disentangling multiple high-energy emission components in the Vela X pulsar wind nebula with the Fermi Large Area Telescope. , keywords =. doi:10.1051/0004-6361/201833356 , archivePrefix =. 1806.11499 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1051/0004-6361/201833356

  75. [75]

    , keywords =

    Energy dependent morphology of the pulsar wind nebula HESS J1825-137 with Fermi-LAT. , keywords =. doi:10.1051/0004-6361/202038375 , archivePrefix =. 2006.11177 , primaryClass =

    work page doi:10.1051/0004-6361/202038375 2006

  76. [76]

    , keywords =

    Detection of a -ray halo around Geminga with the Fermi-LAT data and implications for the positron flux. , keywords =. doi:10.1103/PhysRevD.100.123015 , archivePrefix =. 1903.05647 , primaryClass =

    work page doi:10.1103/physrevd.100.123015 1903

  77. [77]

    arXiv e-prints , keywords =

    Search for Extended GeV Sources in the Inner Galactic Plane. arXiv e-prints , keywords =. doi:10.48550/arXiv.2411.07162 , archivePrefix =. 2411.07162 , primaryClass =

    work page doi:10.48550/arxiv.2411.07162

  78. [78]

    On ultra-high energy cosmic ray acceleration at the termination shock of young pulsar winds

    On ultra-high energy cosmic ray acceleration at the termination shock of young pulsar winds. , keywords =. doi:10.1088/1475-7516/2015/07/016 , archivePrefix =. 1409.0159 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1088/1475-7516/2015/07/016 2015

  79. [79]

    Universe , keywords =

    The Potential for Hadronic Particle Acceleration in Galactic Pulsar Wind Nebulae. Universe , keywords =. doi:10.3390/universe12030085 , archivePrefix =. 2603.17560 , primaryClass =

    work page doi:10.3390/universe12030085

  80. [80]

    , keywords =

    Mass-loading of pulsar winds. , keywords =. doi:10.1046/j.1365-8711.2003.06141.x , archivePrefix =. astro-ph/0202344 , primaryClass =

    work page doi:10.1046/j.1365-8711.2003.06141.x 2003

Showing first 80 references.