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Physics and Astronomy (1)

galaxies: clusters: general – stars: evolution – stars: pre-main sequence

Publications of the Astronomical Society of Australia (1)

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Pre-Mainsequence Stellar Evolution in N-Body Models
Anna D. Railton, Christopher A. Tout, Sverre J. Aarseth
Journal:

Publications of the Astronomical Society of Australia / Volume 31 / 2014

Published online by Cambridge University Press:

24 March 2014, e017
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We provide a set of analytic fits to the radii of pre-mainsequence stars in the mass range 0.1 < M/M⊙ < 8.0. We incorporate the formulae in N-body cluster models for evolution from the beginning of pre-main sequence. In models with 1 000 stars and high initial cluster densities, pre-mainsequence evolution causes roughly twice the number of collisions between stars than in similar models with evolution begun only from the zero-age main sequence. The collisions are often all part of a runaway sequence that creates one relatively massive star.