Results 131 to 140 of about 426,951 (145)
OBSERVATIONAL CONSTRAINTS ON FIRST-STAR NUCLEOSYNTHESIS. I. EVIDENCE FOR MULTIPLE PROGENITORS OF CEMP-NO STARS [PDF]
Astrophysical Journal, 2016 We investigate anew the distribution of absolute carbon abundance, A(C) = log ∊(C), for carbon-enhanced metal-poor (CEMP) stars in the halo of the Milky Way, based on high-resolution spectroscopic data for a total sample of 305 CEMP stars.
Ian U. Roederer +2 more
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Observational Evidence Points at AGB Stars as Possible Progenitors of CEMP-s and CEMP-r/s Stars* [PDF]
Astrophysical Journal, 2021 The origin of enhanced abundance of heavy elements observed in the surface chemical composition of carbonenhanced metal-poor (CEMP) stars still remains poorly understood.
Meenakshi Purandardas, Aruna Goswami
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Spectroscopic study of CEMP-(s & r/s) stars
Astronomy and Astrophysics, 2021 Context. The origin of the enhanced abundances of both s- and r-process elements observed in a subclass of carbon-enhanced metal-poor (CEMP) stars, denoted CEMP-r/s stars, still remains poorly understood.
Rajeev Singh Rathour +2 more
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Understanding the origin of CEMP – no stars through ultra-faint dwarfs
Monthly Notices of the Royal Astronomical Society: Letters, 2023 ABSTRACT The origin of Carbon Enhanced Metal-Poor (CEMP-no) stars with low abundances of neutron-capture elements is still unclear. These stars are ubiquitous, found primarily in the Milky Way halo and ultra-faint dwarf galaxies (UFDs).
Stefania Salvadori, Irène Vanni
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The study of s-process nucleosynthesis based on barium stars, CEMP-s and CEMP-r/s stars [PDF]
Astrophysics and Space Science, 2013 21 pages, 12 figures, accepted publication in ...
Lang Shao, Jianrong Shi, Wenyuan Cui
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Chemodynamical study of two CEMP-no stars from the Hamburg/ESO Survey [PDF]
Monthly Notices of the Royal Astronomical Society, 2023 The Carbon-Enhanced Metal-Poor (CEMP) stars with no enhancement of neutron-capture elements, the so-called CEMP-no stars are believed to be the direct descendants of first-generation stars and provide a unique opportunity to probe the early Galactic ...
Aruna Goswami
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Proceedings of the International Astronomical Union, 2017
AbstractWe monitor a sample of CEMP-no stars using the CFHT and SALT telescopes to gain additional knowledge about the possible binarity of these stars. This information is valuable for each individual star, and additionally it could be used to further constrain their binary fraction.
Anke Arentsen +5 more
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AbstractWe monitor a sample of CEMP-no stars using the CFHT and SALT telescopes to gain additional knowledge about the possible binarity of these stars. This information is valuable for each individual star, and additionally it could be used to further constrain their binary fraction.
Anke Arentsen +5 more
openaire +1 more source
The Evolutionary State of CEMP Stars
Proceedings of the International Astronomical Union, 2018AbstractThe standard scenario for the production of carbon-enhanced extremely metal-poor (CEMP) stars requires a more massive binary companion, which has evolved through the AGB stage and transferred carbon-rich material to the surface of the surviving, likewise extremely metal-poor (EMP) star.
Andersen, Johannes +2 more
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s-Process in Low Metallicity Stars: CEMP-s and CEMP-s+r
AIP Conference Proceedings, 2008A sample of 74 very metal‐poor, C‐ and s‐rich rich stars were collected from the literature. We give here a summary of the results obtained by comparing spectroscopic abundances of CEMP‐s stars and AGB theoretical models, using different 13C‐pocket efficiencies, initial masses and initial r‐enrichments.
S. Bisterzo +4 more
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Characteristics, Classification and Challenges in Searching for CEMP Stars
Research in Astronomy and AstrophysicsAbstract The study of carbon-enhanced metal-poor (CEMP) stars is of great significance for understanding the chemical evolution of the early universe and stellar formation. CEMP stars are characterized by carbon overabundance and are classified into several subclasses based on the abundance patterns of neutron-capture elements, including
Lefeng He +4 more
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