Clues on the first stars from CEMP-no stars

Choplin, Arthur; Meynet, Georges; Maeder, André; Hirschi, Raphael; Ekström, Sylvia; Chiappini, Cristina

Abstract

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.

• Journal Article Type: Article
• Conference Name: Proceedings of the International Astronomical Union - The General Assembly of Galaxy Halos: Structure, Origin and Evolution
• Online Publication Date: May 9, 2016
• Publication Date: 2015-08
• Deposit Date: Jun 15, 2023
• Journal: Proceedings of the International Astronomical Union
• Print ISSN: 1743-9213
• Electronic ISSN: 1743-9221
• Publisher: Cambridge University Press
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: S317
• Pages: 282-283
• DOI: https://doi.org/10.1017/s1743921315006808
• Keywords: Astronomy and Astrophysics; Space and Planetary Science