Volume 372, Number 2, June III 2001
|Page(s)||579 - 582|
|Section||Interstellar and circumstellar matter|
|Published online||15 June 2001|
Massive zero-metal stars: Energy production and mixing
Institut für Theoretische Astrophysik, Universität Heidelberg, Tiergartenstraße 15, 69121 Heidelberg, Germany
Corresponding author: C. W. Straka, email@example.com
Accepted: 2 April 2001
Time-dependent nuclear network calculations at constant temperature show that for zero-metal stars ≳ (i) β-decay reactions and (ii) the 13N(p,γ)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.
Key words: nuclear reactions / convection / stars: evolution
© ESO, 2001
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