The DOI matches its Crossref record; 95 of the 95 references it cites were found in a registry or an index.
CARBON-ENHANCED METAL-POOR STAR FREQUENCIES IN THE GALAXY: CORRECTIONS FOR THE EFFECT OF EVOLUTIONARY STATUS ON CARBON ABUNDANCES
Open accessAbstract
We revisit the observed frequencies of carbon-enhanced metal-poor (CEMP) stars as a function of the metallicity in the Galaxy, using data from the literature with available high-resolution spectroscopy. Our analysis excludes stars exhibiting clear overabundances of neutron-capture elements and takes into account the expected depletion of surface carbon abundance that occurs due to CN processing on the upper red giant branch. This allows for the recovery of the initial carbon abundance of these stars, and thus for an accurate assessment of the frequencies of carbon-enhanced stars. The correction procedure we develop is based on stellar-evolution models and depends on the surface gravity, log g , of a given star. Our analysis indicates that for stars with [Fe/H] ⩽−2.0, 20% exhibit [C/Fe] ⩾+0.7. This fraction increases to 43% for [Fe/H] ⩽−3.0 and 81% for [Fe/H] ⩽−4.0, which is higher than have been previously inferred without taking the carbon abundance correction into account. These CEMP star frequencies provide important inputs for Galactic and stellar chemical evolution models, as they constrain the evolution of carbon at early times and the possible formation channels for the CEMP-no stars. We also have developed a public online tool with which carbon corrections using our procedure can be easily obtained.
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Self-citationEvolution of Asymptotic Giant Branch Stars
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Y 2 Isochrones with an Improved Core Overshoot Treatment
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New Light on Stellar Abundance Analyses: Departures from LTE and Homogeneity
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Self-citationThe Extremely Metal‐poor, Neutron Capture–rich Star CS 22892‐052: A Comprehensive Abundance Analysis
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Cited by
Near-Field Cosmology with Extremely Metal-Poor Stars
Frebel, A., & Norris, J. E. (2015) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-082214-122423 · Cited by 533
Self-citationLee, Y. S., Beers, T. C., & Kim, Y. K. (2019) · The Astrophysical Journal · doi:10.3847/1538-4357/ab4791 · Cited by 31
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Metadata
- Authors
- Placco, V. M., Frebel, A., Beers, T. C., & Stancliffe, R. J.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2014-11-20
- Volume
- 797
- Issue
- 1
- Pages
- 21
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2031802818
- Cited by
- 329
- References
- 95
- FWCI
- 12.37
- Type
- journal article
- Language
- en
- Open access
- bronze
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