On Contraction of Stellar System

Details On Contraction of Stellar System On Contraction of Stellar System

May 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973pthph..49.1567t&link_type=abstract

Progress of Theoretical Physics, Vol. 49, No. 5, pp. 1567-1573

Physics

3

Scientific paper

We consider stellar systems which include the comparable amount of gas with stars. The condition for stellar system to contract due to the dissipation of its kinetic energy through the direct and gravitational interactions between stars and gases is obtained. For a stellar system to contract within a Hubble time, it must be compact initially, and accordingly, the gas density is high. The gas cannot remain interstellar for a Hubble time and the stellar system does not contract unless the system is extremely compact initially. In conclusion, it is impossible for a stellar system to contract from the stage where the dissipation of stellar kinetic energy is ineffective to the stage where it is effective.

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