Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...401..654b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 401, no. 2, p. 654-666.
Astronomy and Astrophysics
Astrophysics
62
Binary Stars, Molecular Clouds, Star Formation, Stellar Mass, Companion Stars, Gravitational Effects, Hydrodynamics, Stellar Rotation
Scientific paper
The study presents calculations of the formation of nonequal mass binary and multiple systems. The systems are the result of the collapse and fragmentation of rotating elongated clouds, which are examined using a 3D smooth particle hydrodynamics code. The effects of the rotation, the initial Jeans number, and the cloud's initial density profile are investigated. Binary formation results in the elongated shape of the initial cloud, one fragment forming on each side of the equatorial line. Slight linear density gradients along the cloud's major axis are sufficient to form nonequal mass fragments. Resultant mass ratios range from 0.1 to 1.0, in agreement with observations. The spatial resolution can affect the mass ratio, especially for low initial Jeans number where the fragments form closer together and tidal forces are important.
Bastien Pierre
Bonnell Ian
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