1998/06/16 by Pavel Kroupa, Kroupa, Pavel
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9806221
LaTeX (style file included), 12 pages, 4 figures, poster presented at NATO ASI on The Physics of Star Formation and Early Stellar Evolution (C.Lada & N.Kylafis), Crete, 24.05.--5.06.98
arxiv created 1998/06/16 · arxiv updated 2009/12/01
Simulations with Aarseth's (1994) NBODY5 code are presented of an initially dense binary-rich cluster. It is assumed that the star formation efficiency is 50 per cent with instantaneous mass loss. The model central density and velocity dispersion agree with the observational constraints if expansion is only about 6x104 yr old. Additionally, the observed binary proportion constrains the primordial proportion to have been significantly less than in Taurus--Auriga. The claim that a variation of the birth binary proportion with gas cloud parameters has been detected, however, can only be verified if the cluster can be shown to be expanding rapidly.