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arxiv: 2606.05154 · v1 · pith:EDF433YEnew · submitted 2026-06-03 · 🌌 astro-ph.SR

Three Extremely Metal-Poor stars: discovery of a new CEMP-no star

Partha Pratim Goswami , Aruna Goswami This is my paper

Pith reviewed 2026-06-28 04:00 UTC · model grok-4.3

classification 🌌 astro-ph.SR
keywords extremely metal-poor starsCEMP-no starscarbon enhancementstellar abundancessupernova enrichmentmetal-poor stars
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The pith

HE 1153-0518 is identified as a new CEMP-no star with abundance patterns indicating faint supernova enrichment.

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

High-resolution spectra of three extremely metal-poor stars show that two are standard EMP stars while the third, HE 1153-0518, exhibits strong carbon enhancement, high absolute carbon abundance, extreme sodium enrichment, very low neutron-capture elements, and a carbon isotopic ratio of 2.0. The authors classify it as a CEMP-no star and link its pattern to enrichment by faint core-collapse supernovae with mixing and fallback. This adds an object to the limited set of high-A(C) CEMP-no stars and supplies constraints on the nucleosynthesis of the first generations of stars. Its infrared excess further suggests circumstellar dust.

Core claim

Detailed abundance analysis identifies HE 1153-0518 as a CEMP-no star with strong carbon enhancement, high absolute carbon abundance, extreme sodium enrichment, very low neutron-capture element abundances, and a very low carbon isotopic ratio of 12C/13C = 2.0. The abundance pattern is consistent with enrichment by faint core-collapse supernovae with mixing and fallback, though binary interaction cannot be ruled out.

What carries the argument

The abundance pattern from high-resolution spectroscopy, compared against CEMP classification criteria, to infer the nucleosynthetic source.

If this is right

  • The discovery adds an important object to the small population of high-A(C) CEMP-no stars.
  • It provides valuable constraints on early chemical enrichment pathways and the nature of the first generations of stars.
  • The spectral energy distribution indicates circumstellar dust, which may relate to the star's formation history.
  • Possibility of binary interaction and internal mixing remains viable alongside the supernova scenario.

Where Pith is reading between the lines

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

  • Observations of more such stars could refine models of supernova yields in the early universe.
  • The low carbon isotopic ratio offers a potential test for carbon production mechanisms in faint supernovae.
  • Similar infrared excesses in other CEMP-no stars might indicate a common evolutionary path.

Load-bearing premise

The abundances measured from the high-resolution spectra accurately reflect the star's composition without large systematic uncertainties from the analysis methods.

What would settle it

Deriving a significantly higher carbon isotopic ratio or higher neutron-capture abundances using different atmospheric parameters or line lists that would reclassify the star away from CEMP-no criteria.

Figures

Figures reproduced from arXiv: 2606.05154 by Aruna Goswami, Partha Pratim Goswami.

Figure 1
Figure 1. Figure 1: Sample spectra of the programme stars in the wavelength region 5160 to 5190 Å [PITH_FULL_IMAGE:figures/full_fig_p003_1.png] view at source ↗
Figure 3
Figure 3. Figure 3: Spectrum synthesis plots of Fe I 5194 Å, 5269 Å & 5328 Å lines for the object HE 1153−0518. The solid black lines represent the ob￾served spectra. The red dotted lines show the synthesised spectra computed using the atmospheric parameters derived in this study. The blue dashed lines correspond to the synthesised spectra obtained using the atmospheric parameters reported by Gaia Collaboration et al. (2023).… view at source ↗
Figure 2
Figure 2. Figure 2: Spectral energy distribution (SED) fits for the programme stars. The red filled circles with error bars represent the observed fluxes at different wavelengths, while the blue open squares denote the corresponding model fluxes. The black solid curves show the best-fitting Kurucz model spectra. ble evidence for circumstellar dust emission. Nevertheless, a more robust confirmation would require additional mid… view at source ↗
Figure 4
Figure 4. Figure 4: Spectrum synthesis plot of C2 molecular band around 5165 Å. The solid black line represents the observed spectra. The black dotted line shows the synthesised spectra. Other two synthesised spectra are displayed corresponding to Δ[C/Fe] = −0.3 and +0.3 with dashed red and dash-dotted blue lines respectively. be detected in the spectrum of the star HE 1153−0518. For the other two stars, we could derive the a… view at source ↗
Figure 5
Figure 5. Figure 5: Comparison of the observed abundances of a few light and heavy elements of our programme stars with the literature data of metal-poor stars compiled by Frebel (2010). The grey-filled circles represent the literature abundance values of metal-poor stars. Cyan-filled squares represent HE 0401−0138, blue-filled triangles represent HE 1246−1344 and red-filled stars represent HE 1153−0518. The error bars to the… view at source ↗
Figure 6
Figure 6. Figure 6 [PITH_FULL_IMAGE:figures/full_fig_p009_6.png] view at source ↗
read the original abstract

We have conducted detailed high-resolution spectroscopic studies on three extremely metal-poor (EMP) stars HE 0401-0138, HE 1153-0518 and HE 1246-1344. For the stars HE 0401-0138 and HE 1246-1344, we have estimated the abundances of C, Na, Mg, Ca, Sc, Ti, Cr, Mn, Co, Ni, Sr and Ba along with the upper limits for Li, O, La, Ce, Pr, Nd, Sm, and Eu. For HE 1153-0518, abundances of seven light elements from C through Ni and two heavy elements, Y and Ba, have been derived, together with upper limits for Li, O, and La. Based on their observed abundance patterns, HE 0401-0138 and HE 1246-1344 are classified as normal EMP stars, whereas HE 1153-0518 is identified as a newly discovered CEMP-no star. HE 1153-0518 shows strong carbon enhancement with a high absolute carbon abundance, extreme sodium enrichment, very low neutron-capture element abundances, and a very low carbon isotopic ratio (12C/13C = 2.0). Its spectral energy distribution shows clear infrared excess, indicating the presence of circumstellar dust. The abundance pattern of HE 1153-0518 suggests enrichment by early nucleosynthetic processes, such as faint core-collapse supernovae with mixing and fallback, while the possibility of binary interaction and subsequent internal mixing cannot be ruled out. The discovery and detailed study of HE 1153-0518 add an important object to the small population of high-A(C) CEMP-no stars and provide valuable constraints on early chemical enrichment pathways and the nature of the first generations of stars.

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 / 1 minor

Summary. The manuscript reports high-resolution spectroscopic analysis of three extremely metal-poor stars (HE 0401-0138, HE 1153-0518, HE 1246-1344). Two are classified as normal EMP stars based on abundances of C, Na, Mg, Ca, Sc, Ti, Cr, Mn, Co, Ni, Sr, and Ba (with upper limits on several others). HE 1153-0518 is identified as a new CEMP-no star showing strong carbon enhancement, high absolute carbon abundance, extreme sodium enrichment, very low neutron-capture elements, a low 12C/13C ratio of 2.0, and infrared excess indicating circumstellar dust; its pattern is interpreted as consistent with enrichment by faint core-collapse supernovae with mixing and fallback (binary interaction not ruled out).

Significance. If the abundance determinations prove robust, the discovery adds an important high-A(C) CEMP-no star to the small known population and supplies observational constraints on early nucleosynthesis pathways and the yields of the first generations of stars.

major comments (2)
  1. [Abstract / results] Abstract and results sections: the CEMP-no classification of HE 1153-0518 and the faint-SN interpretation rest on specific reported values ([C/Fe], [Na/Fe], [Ba/Fe], 12C/13C = 2.0) with no accompanying error bars, line lists, equivalent-width measurements, or adopted model-atmosphere parameters (Teff, log g, [Fe/H], microturbulence), making it impossible to verify that the star meets standard CEMP-no criteria or that systematics do not alter the classification.
  2. [Abundance analysis] Abundance analysis: the derivation assumes 1D LTE line formation for CH bands and Na lines without any cross-check against NLTE corrections, 3D hydrodynamical models, or alternative grids; because these choices directly control the key ratios used for both classification and the supernova-mixing-and-fallback scenario, the central claim cannot be assessed without this information.
minor comments (1)
  1. The abstract is lengthy and repeats several abundance descriptors; a more concise version would improve readability.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the careful and constructive review of our manuscript. We address each major comment below and will revise the paper to improve clarity and verifiability of the results.

read point-by-point responses

  1. Referee: [Abstract / results] Abstract and results sections: the CEMP-no classification of HE 1153-0518 and the faint-SN interpretation rest on specific reported values ([C/Fe], [Na/Fe], [Ba/Fe], 12C/13C = 2.0) with no accompanying error bars, line lists, equivalent-width measurements, or adopted model-atmosphere parameters (Teff, log g, [Fe/H], microturbulence), making it impossible to verify that the star meets standard CEMP-no criteria or that systematics do not alter the classification.

    Authors: We agree that the current presentation lacks sufficient detail for independent verification. In the revised manuscript we will add a table of adopted atmospheric parameters (Teff, log g, [Fe/H], microturbulence) for all three stars, report the measured equivalent widths or synthesis details for the key lines, include the line lists employed, and attach 1-sigma uncertainties to the reported abundance ratios including [C/Fe], [Na/Fe], [Ba/Fe] and the carbon isotopic ratio. These additions will allow direct assessment of whether HE 1153-0518 satisfies the standard CEMP-no criteria. revision: yes

  2. Referee: [Abundance analysis] Abundance analysis: the derivation assumes 1D LTE line formation for CH bands and Na lines without any cross-check against NLTE corrections, 3D hydrodynamical models, or alternative grids; because these choices directly control the key ratios used for both classification and the supernova-mixing-and-fallback scenario, the central claim cannot be assessed without this information.

    Authors: The analysis was performed under the standard 1D LTE assumption that is conventional for high-resolution studies of EMP stars at this metallicity. We acknowledge that NLTE effects on Na and 3D effects on CH can be non-negligible. In the revision we will add a dedicated paragraph discussing the expected magnitude of these corrections based on published grids for stars of comparable parameters, and we will note that even after applying typical literature corrections the star remains well above the CEMP threshold and retains its low neutron-capture abundances. A full 3D-NLTE re-analysis lies beyond the scope of the present work but is identified as a desirable follow-up. revision: partial

Circularity Check

0 steps flagged

No significant circularity in abundance-based classification of HE 1153-0518

full rationale

The paper derives elemental abundances (C, Na, Mg, etc.) from high-resolution spectra of three EMP stars and classifies HE 1153-0518 as CEMP-no by direct comparison of the resulting [C/Fe], [Ba/Fe], 12C/13C ratio, and neutron-capture abundances against standard literature definitions of CEMP-no stars. No step reduces by construction to a fitted parameter defined from the same data, no self-citation chain is load-bearing for the classification, and no ansatz or uniqueness theorem is smuggled in. The derivation chain is self-contained against external benchmarks.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Review performed on abstract only; no explicit free parameters, axioms, or invented entities are stated. Typical stellar abundance work implicitly relies on LTE assumptions and 1D model atmospheres, but these are not detailed here.

pith-pipeline@v0.9.1-grok · 5873 in / 1133 out tokens · 40572 ms · 2026-06-28T04:00:26.461564+00:00 · methodology

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Reference graph

Works this paper leans on

242 extracted references · 217 canonical work pages · 91 internal anchors

  1. [1]

    Alonso A., Arribas S., Martinez-Roger C., 1996, , https://ui.adsabs.harvard.edu/abs/1996A&A...313..873A 313, 873

    1996

  2. [6]

    J., & Scott, P

    Asplund M., Grevesse N., Sauval A. J., Scott P., 2009, @doi [ ] 10.1146/annurev.astro.46.060407.145222 , 47, 481

    work page doi:10.1146/annurev.astro.46.060407.145222 2009

  3. [17]

    M., et al., 2003, VizieR Online Data Catalog, https://ui.adsabs.harvard.edu/abs/2003yCat.2246....0C p

    Cutri R. M., et al., 2003, VizieR Online Data Catalog, https://ui.adsabs.harvard.edu/abs/2003yCat.2246....0C p. II/246

    2003

  4. [32]

    Hinkle K., Wallace L., Valenti J., Harmer D., 2000, Visible and Near Infrared Atlas of the Arcturus Spectrum 3727-9300 A

    2000

  5. [34]

    C., Huang Y., Cabrera Garcia J., Lee Y

    Hong J., Beers T. C., Huang Y., Cabrera Garcia J., Lee Y. S., Placco V. M., Kirby E. N., 2026, @doi [arXiv e-prints] 10.48550/arXiv.2602.10325 , https://ui.adsabs.harvard.edu/abs/2026arXiv260210325H p. arXiv:2602.10325

    work page doi:10.48550/arxiv.2602.10325 2026

  6. [37]

    S., Beers T

    Lee Y. S., Beers T. C., Hirai Y., Hong J., Jeong M., Kim C., Kim Y. K., 2025, @doi [ ] 10.3847/2041-8213/ae0641 , https://ui.adsabs.harvard.edu/abs/2025ApJ...991L..42L 991, L42

    work page doi:10.3847/2041-8213/ae0641 2025

  7. [56]

    A., 1973, PhD thesis, The University of Texas at Austin

    Sneden C. A., 1973, PhD thesis, The University of Texas at Austin

    1973

  8. [61]

    A., Piskunov N., 1996, , https://ui.adsabs.harvard.edu/abs/1996A&AS..118..595V 118, 595

    Valenti J. A., Piskunov N., 1996, , https://ui.adsabs.harvard.edu/abs/1996A&AS..118..595V 118, 595

    1996

  9. [66]

    2005", month =

    The Discovery and Analysis of Very Metal-Poor Stars in the Galaxy. , year = "2005", month = "Sep", volume =. doi:10.1146/annurev.astro.42.053102.134057 , adsurl =

    work page doi:10.1146/annurev.astro.42.053102.134057 2005

  10. [67]

    Carbon-enhanced Metal-poor Stars in SDSS/SEGUE. I. Carbon Abundance Estimation and Frequency of CEMP Stars. , archivePrefix = "arXiv", eprint =. doi:10.1088/0004-6256/146/5/132 , adsurl =

    work page doi:10.1088/0004-6256/146/5/132

  11. [68]

    Astronomy & Astrophysics , volume=

    The first carbon-enhanced metal-poor star found in the Sculptor dwarf spheroidal , author=. Astronomy & Astrophysics , volume=. 2015 , publisher=

    2015

  12. [69]

    Carbon-enhanced Metal-poor Stars. I. Chemical Compositions of 26 Stars. , eprint =. doi:10.1086/509817 , adsurl =

    work page doi:10.1086/509817

  13. [70]

    , archivePrefix = "arXiv", eprint =

    How plausible are the proposed formation scenarios of CEMP-r/s stars?. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201527864 , adsurl =

    work page doi:10.1051/0004-6361/201527864

  14. [71]

    A new classification scheme based on Sr and Ba

    Abundances and kinematics of carbon-enhanced metal-poor stars in the Galactic halo. A new classification scheme based on Sr and Ba. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201834601 , adsurl =

    work page doi:10.1051/0004-6361/201834601

  15. [72]

    , eprint =

    Low-mass supernovae in the early Galactic halo: source of the double r/s-process enriched halo stars?. , eprint =. doi:10.1111/j.1365-2966.2004.07552.x , adsurl =

    work page doi:10.1111/j.1365-2966.2004.07552.x 2004

  16. [73]

    , volume=

    Enrichment of Very Metal Poor Stars with Both r-Process and s-Process Elements from 8-10 M☉ Stars , author=. , volume=. 2006 , publisher=

    2006

  17. [74]

    Stellar Sources for Heavy r-Process Nuclei

    Stellar Sources for Heavy r-Process Nuclei. , keywords =. 2003. doi:10.1086/374271 , archivePrefix =. astro-ph/0301461 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/374271 2003

  18. [75]

    , eprint =

    Abundance Analysis of HE 2148-1247, A Star with Extremely Enhanced Neutron Capture Elements. , eprint =. doi:10.1086/374269 , adsurl =

    work page doi:10.1086/374269

  19. [76]

    , archivePrefix = "arXiv", eprint =

    The s-process in low-metallicity stars - II. Interpretation of high-resolution spectroscopic observations with asymptotic giant branch models. , archivePrefix = "arXiv", eprint =. doi:10.1111/j.1365-2966.2011.19484.x , adsurl =

    work page doi:10.1111/j.1365-2966.2011.19484.x 2011

  20. [77]

    , eprint =

    CH stars at high Galactic latitudes. , eprint =. doi:10.1111/j.1365-2966.2005.08917.x , adsurl =

    work page doi:10.1111/j.1365-2966.2005.08917.x 2005

  21. [78]

    Baltic Astronomy , keywords =

    A New Version of the Catalog of CH and Related Stars (CH95 Catalog). Baltic Astronomy , keywords =. doi:10.1515/astro-1996-0207 , adsurl =

    work page doi:10.1515/astro-1996-0207 1996

  22. [79]

    1956", month =

    The carbon stars An astrophysical enigma. Vistas in Astronomy , year = "1956", month = "Jan", volume =. doi:10.1016/0083-6656(56)90071-X , adsurl =

    work page doi:10.1016/0083-6656(56)90071-x 1956

  23. [80]

    Harvard College Observatory Bulletin , year = 1940, month = jun, volume = 913, pages =

    New Peculiar Spectra. Harvard College Observatory Bulletin , year = 1940, month = jun, volume = 913, pages =

    1940

  24. [81]

    , year = 1944, month = mar, volume = 99, pages =

    Radial Velocities of 283 Stars of Spectral Classes R and N. , year = 1944, month = mar, volume = 99, pages =. doi:10.1086/144603 , adsurl =

    work page doi:10.1086/144603 1944

  25. [82]

    , keywords =

    The effective temperatures of carbon-rich stars. , keywords =. doi:10.1051/0004-6361:20010106 , adsurl =

    work page doi:10.1051/0004-6361:20010106

  26. [83]

    , archivePrefix = "arXiv", eprint =

    Abundances of carbon-enhanced metal-poor stars as constraints on their formation. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201526895 , adsurl =

    work page doi:10.1051/0004-6361/201526895

  27. [84]

    , archivePrefix = "arXiv", eprint =

    [O/Fe] Estimates for Carbon-enhanced Metal-poor Stars from Near-infrared Spectroscopy. , archivePrefix = "arXiv", eprint =. doi:10.1088/0004-6256/141/3/102 , adsurl =

    work page doi:10.1088/0004-6256/141/3/102

  28. [85]

    , archivePrefix = "arXiv", eprint =

    HE 0017+0055: A probable pulsating CEMP-rs star and long-period binary. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201526993 , adsurl =

    work page doi:10.1051/0004-6361/201526993

  29. [86]

    , archivePrefix = "arXiv", eprint =

    Binary properties of CH and carbon-enhanced metal-poor stars. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201526992 , adsurl =

    work page doi:10.1051/0004-6361/201526992

  30. [87]

    A large, homogeneously-selected sample of high latitude carbon stars

    The stellar content of the Hamburg/ESO survey II. A large, homogeneously-selected sample of high latitude carbon stars. , eprint =. doi:10.1051/0004-6361:20010814 , adsurl =

    work page doi:10.1051/0004-6361:20010814

  31. [88]

    Empirical calibration of \ T\_\ \

    The effective temperature scale of giant stars (F0-K5) - II. Empirical calibration of \ T\_\ \. doi:10.1051/aas:1999521

    work page doi:10.1051/aas:1999521

  32. [90]

    , volume =

    Goswami, Aruna and Aoki, Wako and Karinkuzhi, Drisya , title = ". , volume =. 2015 , month =. doi:10.1093/mnras/stv2011 , url =

    work page doi:10.1093/mnras/stv2011 2015

  33. [91]

    Jacques and Scott, Pat , title =

    Asplund, Martin and Grevesse, Nicolas and Sauval, A. Jacques and Scott, Pat , title =. , volume =. 2009 , doi =

    2009

  34. [92]

    , archivePrefix = "arXiv", eprint =

    Line strengths and updated molecular constants for the C _ 2 Swan system. , archivePrefix = "arXiv", eprint =. doi:10.1016/j.jqsrt.2013.02.025 , adsurl =

    work page doi:10.1016/j.jqsrt.2013.02.025 2013

  35. [93]

    , archivePrefix = "arXiv", eprint =

    Line Lists for the A ^ 2 -X ^ 2 ^ + (Red) and B ^ 2 ^ + -X ^ 2 ^ + (Violet) Systems of CN, ^ 13 C ^ 14 N, and ^ 12 C ^ 15 N, and Application to Astronomical Spectra. , archivePrefix = "arXiv", eprint =. doi:10.1088/0067-0049/214/2/26 , adsurl =

    work page doi:10.1088/0067-0049/214/2/26

  36. [94]

    , keywords =

    Improved Line Data for the Swan System ^ 12 C ^ 13 C Isotopologue. , keywords =. doi:10.1088/0067-0049/211/1/5 , adsurl =

    work page doi:10.1088/0067-0049/211/1/5

  37. [95]

    , eprint =

    On the Perils of Hyperfine Splitting: A Reanalysis of MN and SC Abundance Trends. , eprint =. doi:10.1086/312749 , adsurl =

    work page doi:10.1086/312749

  38. [96]

    , keywords =

    Barium Abundances in Extremely Metal-poor Stars. , keywords =. doi:10.1086/300289 , adsurl =

    work page doi:10.1086/300289

  39. [97]

    The Hamburg/ESO R-process enhanced star survey (HERES). III. HE 0338-3945 and the formation of the r + s stars. , eprint =. doi:10.1051/0004-6361:20054470 , adsurl =

    work page doi:10.1051/0004-6361:20054470

  40. [98]

    , archivePrefix = "arXiv", eprint =

    Ba and Eu abundances in M 15 giant stars. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201321097 , adsurl =

    work page doi:10.1051/0004-6361/201321097

  41. [99]

    , eprint =

    Abundances of 30 Elements in 23 Metal-Poor Stars. , eprint =. doi:10.1086/338117 , adsurl =

    work page doi:10.1086/338117

  42. [100]

    , keywords =

    Elemental abundance trends in the Galactic thin and thick disks as traced by nearby F and G dwarf stars. , keywords =. doi:10.1051/0004-6361:20031213 , adsurl =

    work page doi:10.1051/0004-6361:20031213

  43. [101]

    Summary of the astrometric, photometric, and survey properties

    Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201629512 , adsurl =

    work page doi:10.1051/0004-6361/201629512

  44. [102]

    Mapping the Milky Way disc kinematics

    Gaia Data Release 2. Mapping the Milky Way disc kinematics. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201832865 , adsurl =

    work page doi:10.1051/0004-6361/201832865

  45. [103]

    Summary of the contents and survey properties

    Gaia Early Data Release 3. Summary of the contents and survey properties. , keywords =. doi:10.1051/0004-6361/202039657 , archivePrefix =. 2012.01533 , primaryClass =

    work page doi:10.1051/0004-6361/202039657 2012

  46. [104]

    Summary of the content and survey properties

    Gaia Data Release 3. Summary of the content and survey properties. , keywords =. doi:10.1051/0004-6361/202243940 , archivePrefix =. 2208.00211 , primaryClass =

    work page doi:10.1051/0004-6361/202243940

  47. [105]

    A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria

    Local kinematics and the local standard of rest. , archivePrefix = "arXiv", eprint =. doi:10.1111/j.1365-2966.2010.16253.x , adsurl =

    work page doi:10.1111/j.1365-2966.2010.16253.x 2010

  48. [106]

    Chemical analysis of CH stars - III: Atmospheric parameters and elemental abundances

    Chemical analysis of CH stars - III. Atmospheric parameters and elemental abundances. , keywords =. 2019. doi:10.1093/mnras/stz759 , archivePrefix =. 1904.03904 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1093/mnras/stz759 2019

  49. [107]

    , keywords =

    Elemental abundance survey of the Galactic thick disc. , eprint =. doi:10.1111/j.1365-2966.2006.10148.x , adsurl =

    work page doi:10.1111/j.1365-2966.2006.10148.x 2006

  50. [108]

    , eprint =

    Oxygen trends in the Galactic thin and thick disks. , eprint =. doi:10.1051/0004-6361:20031655 , adsurl =

    work page doi:10.1051/0004-6361:20031655

  51. [109]

    , eprint =

    On the correlation of elemental abundances with kinematics among galactic disk stars. , eprint =. doi:10.1051/0004-6361:20034454 , adsurl =

    work page doi:10.1051/0004-6361:20034454

  52. [110]

    , eprint =

    Neutron Capture in Low-Mass Asymptotic Giant Branch Stars: Cross Sections and Abundance Signatures. , eprint =. doi:10.1086/307938 , adsurl =

    work page doi:10.1086/307938

  53. [111]

    , archivePrefix = "arXiv", eprint =

    The s-process in low-metallicity stars - III. Individual analysis of CEMP-s and CEMP-s/r with asymptotic giant branch models. , archivePrefix = "arXiv", eprint =. doi:10.1111/j.1365-2966.2012.20670.x , adsurl =

    work page doi:10.1111/j.1365-2966.2012.20670.x 2012

  54. [112]

    , eprint =

    Neutron Capture Elements in s-Process-Rich, Very Metal-Poor Stars. , eprint =. doi:10.1086/323230 , adsurl =

    work page doi:10.1086/323230

  55. [113]

    , keywords =

    The Mystery of CEMPs+r Stars and the Dual Core-Flash Neutron Superburst. , keywords =. doi:10.1071/AS08068 , adsurl =

    work page doi:10.1071/as08068

  56. [114]

    , archivePrefix = "arXiv", eprint =

    Radiative levitation in carbon-enhanced metal-poor stars with s-process enrichment. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201628540 , adsurl =

    work page doi:10.1051/0004-6361/201628540

  57. [115]

    Models of Metal-poor Stars with Gravitational Settling and Radiative Accelerations. I. Evolution and Abundance Anomalies. , keywords =. 2002. doi:10.1086/338952 , adsurl =

    work page doi:10.1086/338952 2002

  58. [116]

    A Subaru/HDS study of Lead (Pb) abundances in eight s-process-element-rich, metal-poor stars

    A Subaru/High Dispersion Spectrograph Study of Lead (Pb) Abundances in Eight s-Process Element-rich, Metal-poor Stars. , keywords =. 2002. doi:10.1086/343885 , archivePrefix =. astro-ph/0208020 , primaryClass =

    work page internal anchor Pith review Pith/arXiv arXiv doi:10.1086/343885 2002

  59. [117]

    Carbon-Enhanced Metal-Poor Stars. III. Main-Sequence Turnoff Stars from the SDSS SEGUE Sample. , archivePrefix = "arXiv", eprint =. doi:10.1086/533517 , adsurl =

    work page doi:10.1086/533517

  60. [118]

    , eprint =

    New analysis of the two carbon-rich stars CS 22948-27 and CS 29497-34: Binarity and neutron capture elements. , eprint =. doi:10.1051/0004-6361:20040415 , adsurl =

    work page doi:10.1051/0004-6361:20040415

  61. [119]

    The Hamburg/ESO R-process enhanced star survey (HERES). II. Spectroscopic analysis of the survey sample. , eprint =. doi:10.1051/0004-6361:20052967 , adsurl =

    work page doi:10.1051/0004-6361:20052967

  62. [120]

    Chemical abundances from CO ^ 5 BOLD 3D hydrodynamical model atmospheres

    Three carbon-enhanced metal-poor dwarf stars from the SDSS. Chemical abundances from CO ^ 5 BOLD 3D hydrodynamical model atmospheres. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/200913213 , adsurl =

    work page doi:10.1051/0004-6361/200913213

  63. [121]

    , eprint =

    Carbon Stars in the Hamburg/ESO Survey: Abundances. , eprint =. doi:10.1086/504597 , adsurl =

    work page doi:10.1086/504597

  64. [122]

    Atmospheric parameters and elemental abundances

    Chemical analysis of CH stars - I. Atmospheric parameters and elemental abundances. , archivePrefix = "arXiv", eprint =. doi:10.1093/mnras/stu148 , adsurl =

    work page doi:10.1093/mnras/stu148

  65. [123]

    Atmospheric parameters and elemental abundances

    Chemical analysis of CH stars - II. Atmospheric parameters and elemental abundances. , archivePrefix = "arXiv", eprint =. doi:10.1093/mnras/stu2079 , adsurl =

    work page doi:10.1093/mnras/stu2079

  66. [124]

    , keywords =

    A high-resolution spectral analysis of three carbon-enhanced metal-poor stars. , eprint =. doi:10.1111/j.1365-2966.2006.10877.x , adsurl =

    work page doi:10.1111/j.1365-2966.2006.10877.x 2006

  67. [125]

    , keywords =

    Heavy-element abundances in the CH/CN-strong very metal-poor stars CS 22948-27 and CS 29497-34. , keywords =

  68. [126]

    , archivePrefix = "arXiv", eprint =

    Chemical Abundances of Outer Halo Stars in the Milky Way. , archivePrefix = "arXiv", eprint =. doi:10.1093/pasj/62.1.143 , adsurl =

    work page doi:10.1093/pasj/62.1.143

  69. [127]

    , archivePrefix = "arXiv", eprint =

    Chemical Compositions of Kinematically Selected Outer Halo Stars. , archivePrefix = "arXiv", eprint =. doi:10.1088/0004-637X/706/2/1095 , adsurl =

    work page doi:10.1088/0004-637x/706/2/1095

  70. [128]

    , keywords =

    High-resolution spectroscopic observations of two chemically peculiar metal-poor stars: HD 10613 and BD+04 2466. , keywords =. doi:10.1051/0004-6361/200810851 , adsurl =

    work page doi:10.1051/0004-6361/200810851

  71. [129]

    , eprint =

    Neutron-Capture Elements in the Early Galaxy: Insights from a Large Sample of Metal-poor Giants. , eprint =. doi:10.1086/317172 , adsurl =

    work page doi:10.1086/317172

  72. [130]

    , archivePrefix = "arXiv", eprint =

    Elemental abundances and classification of carbon-enhanced metal-poor stars. , archivePrefix = "arXiv", eprint =. doi:10.1051/0004-6361/201015615 , adsurl =

    work page doi:10.1051/0004-6361/201015615

  73. [131]

    The CH Stars. III. Heavy Element Abundances. , keywords =. doi:10.1086/116375 , adsurl =

    work page doi:10.1086/116375

  74. [132]

    , eprint =

    Near-Ultraviolet Observations of CS 29497-030: New Constraints on Neutron-Capture Nucleosynthesis Processes. , eprint =. doi:10.1086/432465 , adsurl =

    work page doi:10.1086/432465

  75. [133]

    , keywords =

    Abundances in the Very Metal Poor s-Process-rich Star CS 22183-015. , keywords =. doi:10.1086/345315 , adsurl =

    work page doi:10.1086/345315

  76. [134]

    , eprint =

    The s-Process in Metal-Poor Stars: Abundances for 22 Neutron-Capture Elements in CS 31062-050. , eprint =. doi:10.1086/382147 , adsurl =

    work page doi:10.1086/382147

  77. [135]

    , eprint =

    Chemical abundances in 43 metal-poor stars. , eprint =. doi:10.1051/0004-6361:20052797 , adsurl =

    work page doi:10.1051/0004-6361:20052797

  78. [136]

    Stellar Archaeology: A Keck Pilot Program on Extremely Metal-Poor Stars From the Hamburg/ESO Survey. III. The Lead (Pb) Star HE 0024-2523. , eprint =. doi:10.1086/345886 , adsurl =

    work page doi:10.1086/345886

  79. [137]

    , keywords =

    The Incidence of Binaries among Very Metal-poor Carbon Stars. , keywords =. doi:10.1086/322082 , adsurl =

    work page doi:10.1086/322082

  80. [138]

    CS 29497-030: Evidence for operation of the s-process at very low metallicity

    First stars IV. CS 29497-030: Evidence for operation of the s-process at very low metallicity. , eprint =. doi:10.1051/0004-6361:20031590 , adsurl =

    work page doi:10.1051/0004-6361:20031590

Showing first 80 references.