Results 31 to 40 of about 426,951 (145)
Nucleosynthesis in low-mass stars: Shedding light on the cosmic origin of heavy elements [PDF]
EPJ Web of ConferencesLow-mass, low-metallicity stars while evolving through the asymptotic giant branch (AGB) phase undergo significant nucleosynthesis producing the majority of slow (s-) and intermedite (i-) neutron capture elements.
Goswami Aruna
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Clues about the first stars from CEMP-no stars [PDF]
Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics, 2015 4 pages, 1 figure, sf2a ...
{Choplin} A., {Meynet} G., {Maeder} A.
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Radial Velocity Properties of Binary CEMP-r/s Stars [PDF]
, 2021 Low metallicity stars allow us to better understand the chemical evolution of the Milky Way. A large fraction of low metallicity stars show large enhancements in carbon. These stars are known as Carbon Enhanced Metal Poor stars (CEMP stars).
Cathey, Jared Lee
core
Probing the Nucleosynthetic Contribution of Low-metallicity, Low-mass Star Companions of CEMP Stars* [PDF]
The Astrophysical Journal, 2021 Abstract The observed abundance diversities among CEMP stars can shed light on the formation and evolution of elements in the early Galaxy. In this work, we present results obtained from a detailed abundance analysis of a sample of seven extrinsic carbon stars. The analysis is based on high-resolution spectra obtained with HCT/HESP (R∼60,
J. Shejeelammal, Aruna Goswami
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Interpretation of CEMP(s) and CEMP(s + r) Stars with AGB Models [PDF]
Publications of the Astronomical Society of Australia, 2009 AbstractAsymptotic Giant Branch (AGB) stars play a fundamental role in s-process nucleosynthesis during their thermal pulsing phase. The theoretical predictions obtained by AGB models at different masses, s-process efficiencies, dilution factors and initial r-enrichment, are compared with spectroscopic observations of Carbon-Enhanced Metal-Poor stars ...
Bisterzo, S. +3 more
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The CEMP star SDSS J0222–0313: The first evidence of proton ingestion in very low-metallicity AGB stars? [PDF]
, 2019 Indexación ScopusContext. Carbon-enhanced metal-poor (CEMP) stars are common objects in the metal-poor regime. The lower the metallicity we look at, the larger the fraction of CEMP stars with respect to metal-poor stars with no enhancement in carbon. The
E., Caffau +11 more
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The Astrophysical Journal, 2023 Orbital characteristics based on Gaia Early Data Release 3 astrometric parameters are analyzed for ∼1700 r -process-enhanced (RPE; [Eu/Fe] > +0.3) metal-poor stars ([Fe/H] ≤ −0.8) compiled from the R -Process Alliance, the GALactic Archaeology with ...
Derek Shank +10 more
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TITANS metal-poor reference stars [PDF]
Astronomy & Astrophysics, 2023 Context. Representative samples of F-, G-, K-type stars located outside of the solar neighbourhood have started to become available in spectroscopic surveys. The fraction of metal-poor ([Fe/H] ≲ −0.8 dex) giants becomes increasingly relevant towards greater distances.
R. E. Giribaldi +8 more
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Low-mass low-metallicity AGB stars as an efficient
, 2021 Context. Among carbon-enhanced metal-poor (CEMP) stars, some are found to be enriched in slow-neutron capture (s-process) elements (and are then tagged CEMP-s), some have overabundances in rapid-neutron capture (r-process) elements (tagged CEMP-r), and ...
D. Karinkuzhi +15 more
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Understanding the orbital periods of CEMP-s stars [PDF]
Astronomy & Astrophysics, 2018 The chemical enrichments detected in carbon- and s-element-enhanced metal-poor (CEMP-s) stars are believed to be the consequence of a past episode of mass transfer from a now extinct asymptotic-giant-branch primary star. This hypothesis is borne out by the evidence that most CEMP-s stars exhibit radial-velocity variations suggesting that they belong to
Carlo Abate +2 more
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