Title of article :
Theoretical stellar ΔY/ΔO in the early Universe
Author/Authors :
Sylvia Ekstrom، نويسنده , , Georges Meynet، نويسنده , , Andre Maeder، نويسنده , , Cristina Chiappini، نويسنده , , Cyril Georgy، نويسنده , , Raphael Hirschi، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Abstract :
Population III stars initiated the chemical enrichment of the Universe. Chemical evolution models seem to favour fast rotators among the very low-metallicity population. When a star rotates fast, it ejects significant quantities of He and its nucleosynthesic products are modified compared to the case without rotation. The value of ΔY/ΔO is explored from a theoretical point of view through stellar models of zero- or very low-metallicity.
Keywords :
nucleosynthesis , early universe , stars: rotation
Journal title :
Proceedings of the International Astronomical Union
Journal title :
Proceedings of the International Astronomical Union
