Massive zero-metal stars: Energy production and mixing

Details Massive zero-metal stars: Energy production and mixing Massive zero-metal stars: Energy production and mixing

2001-03-21

arxiv.org/abs/astro-ph/0103339v1

Astron.Astrophys. 372 (2001) 579-582

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, submitted to A&A (Letter)

Scientific paper

10.1051/0004-6361:20010521

Time-dependent nuclear network calculations at constant temperature show that for zero-metal stars >= 20 Msun (i) beta-decay reactions and (ii) the 13N(p,gamma)14O reaction must be included. It is also shown that the nuclear timescale in these zero-metal stars is shorter than the mixing timescale and therefore the assumption of instantaneous mixing across convective regions is not fulfilled. We conclude that proper modeling of these processes may alter the evolution of massive zero-metal stars.

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