Pre-Mainsequence Stellar Evolution in N-Body Models. (24th March 2014)

• Record Type: Journal Article
• Authors: Railton, Anna D.; Tout, Christopher A.; Aarseth, Sverre J.
• Is Part Of: Publications of the Astronomical Society of Australia. Volume 31(2014)
• Publication Date: 2014-03-24
• Subjects: galaxies: clusters: general – stars: evolution – stars: pre-main sequence; Astronomy -- Periodicals; Southern sky (Astronomy) -- Periodicals; Astrophysics -- Periodicals; Periodicals; 520.5
• DOI: 10.1017/pasa.2014.10
• Languages: English
• ISSNs: 1323-3580

Abstract

Abstract: 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.