Physics – Nuclear Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1238..126k&link_type=abstract
TOURS SYMPOSIUM ON NUCLEAR PHYSICS AND ASTROPHYSICS-VII. AIP Conference Proceedings, Volume 1238, pp. 126-129 (2010).
Physics
Nuclear Physics
Star Formation, Stellar Evolution, Chemical Analysis, Clusters Of Galaxies, Star Formation, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Chemical Composition And Chemical Evolution, Galaxy Clusters
Scientific paper
Extremely metal-poor (EMP) stars in the Galactic halo are the remaining survivors of the early generations of stars. Their surface element abundances are signature of the nucleosynthesis in the first and second generation of stars. From comparison between the observationsof EMP stars and calculations of stellar evolution, it is suggested that typical mass of EMP stars are much higher than more metal-rich one and the majority of observed EMP stars are formed in binary systems. I review the effect of binarity and difference of initial mass function on the EMP stars and chemical evolution of galaxy. We calculate chemical enrichment history in the context of hierarchical Galaxy formation with high mass IMF and binary contribution. We compare resultant abundance distributions with observations. Additionally, I discuss the origin of the most metal-deficient stars known to date.
Fujimoto Masayuki Y.
Komiya Yutaka
Suda Takuma
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