A thermodynamic approach to the last stages of star formation when a collapsing fragment evolves adiabatically into a single protostar is presented. Angular momentum transfer is shown to be a very efficient mechanism tending to form double stars with small mass secondaries, and total decoupling is shown to form twin binaries. It is noted that disks of larger mass, which would be required to produce protoplanetary systems as a consequence of dynamical instabilities, do not form under any circumstances.
FORMATION OF BINARY-SYSTEMS AND PROTOPLANETARY DISKS - A UNIFIED APPROACH
FERRINI, FEDERICO;PAOLICCHI, PAOLO
1988-01-01
Abstract
A thermodynamic approach to the last stages of star formation when a collapsing fragment evolves adiabatically into a single protostar is presented. Angular momentum transfer is shown to be a very efficient mechanism tending to form double stars with small mass secondaries, and total decoupling is shown to form twin binaries. It is noted that disks of larger mass, which would be required to produce protoplanetary systems as a consequence of dynamical instabilities, do not form under any circumstances.File in questo prodotto:
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