Other
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ecgou..23..307b&link_type=abstract
Ecole de Goutelas #23, CNRS, 22-26 May 2000, edited by D. Egret, J.-L. Halbwachs, and J.-M. Hameury. Publisher: Societe Francai
Other
Scientific paper
As most stars are found in binary and multiple systems, the main product of star formation must be the formation of binary and multiple stars. Binary and multiple star formation can occur through a number of mechanisms, generally involving a fragmentation even during the gravitational collapse process or the fragmentation of a circumstellar disc. Such events, and the subsequent accretion, can explain the majority of systems with separations of ~> 1 AU to 104 AU as well as their mass ratios and eccentricities. Forming close binary systems is intrinsically difficult due to the formation of an outer protostellar core when the gas in the form of molecular hydrogen becomes optically thick. One possibility to explain their formation is subsequent evolution due to the residual gas in the system or due to the presence of other stars.
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