Interaction between a high-velocity star and a hot dense cloud

Details Interaction between a high-velocity star and a hot dense cloud Interaction between a high-velocity star and a hot dense cloud

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..74...11d&link_type=abstract

Astrophysics and Space Science, vol. 74, no. 1, Jan. 1981, p. 11-30.

Astronomy and Astrophysics

Astrophysics

4

Hydrodynamics, Interstellar Gas, Nebulae, Stellar Motions, Active Galactic Nuclei, Astronomical Models, Flow Velocity, Quasars, Stellar Envelopes, Stellar Mass Accretion

Scientific paper

In order to investigate the fate of a high-velocity star confined to a massive gas cloud, the hydrodynamic behavior of a radiation-dominated flow past a finite-size gravitating object is calculated. Such a study is important in the context of quasars and active galactic nuclei, since large gas clouds have been suggested to be associated with the phenomena occurring in these systems. In particular, the processes of mass and energy exchange between the ambient gas and the star is studied. A significant result is that the effective accretion cross-section is found to be a substantial fraction of the stellar geometrical cross-section. Consequently, the buildup of massive stars via accretion of the surrounding gas may be important in determining the evolution of the system of stars confined to the cloud.

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