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Clues on the first stars from CEMP-no stars

Published online by Cambridge University Press:  09 May 2016

Arthur Choplin ,
Georges Meynet ,
André Maeder ,
Raphael Hirschi ,
Sylvia Ekström  and
Cristina Chiappini
Arthur Choplin
Affiliation:
Geneva Observatory, Geneva University, CH–1290 Sauverny, Switzerland email: [email protected]
Georges Meynet
Affiliation:
Geneva Observatory, Geneva University, CH–1290 Sauverny, Switzerland email: [email protected]
André Maeder
Affiliation:
Geneva Observatory, Geneva University, CH–1290 Sauverny, Switzerland email: [email protected]
Raphael Hirschi
Affiliation:
Astrophysics group, Keele University, Lennard-Jones Lab., Keele, ST5 5BG, UK
Sylvia Ekström
Affiliation:
Geneva Observatory, Geneva University, CH–1290 Sauverny, Switzerland email: [email protected]
Cristina Chiappini
Affiliation:
Leibniz-Institut fuer Astrophysik, An der Sternwarte 16, 14482 Potsdam, Germany
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Abstract

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The material used to form the CEMP-no stars presents signatures of processing by the CNO cycle and by He-burning from a previous stellar generation called spinstars. We compare the composition of the ejecta (wind + supernova) of a spinstar model to observed abundances of CEMP-no stars. We show that observed abundances as well as the isotope ratio 12C/13C may be reproduced by the spinstar ejecta if we assume different mass cuts when adding the supernova material to the wind ejecta.

Keywords

stars: evolutionrotationmassiveabundancesnucleosynthesischemically peculiar
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Issue S317: The General Assembly of Galaxy Halos: Structure, Origin and Evolution , August 2015 , pp. 282 - 283
Copyright
Copyright © International Astronomical Union 2016 

References

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Norris, J. E., Yong, D., Bessell, M. S., et al. 2013, ApJ, 762, 28Google Scholar
Meynet, G., Hirschi, R., Ekstrom, S., et al. 2010, A&A, 521, A30Google Scholar
Maeder, A., & Meynet, G. and Chiappini, C. 2014, A&A, 576, A56Google Scholar
Chiappini, C., Ekström, S., Meynet, G., et al. 2008, A&A (Letters) 479, L9–L12Google Scholar