Dynamics of the sweeping of interstellar clouds from a rotating galaxy as it moves in the intergalactic medium

Details Dynamics of the sweeping of interstellar clouds from a rotating galaxy as it moves in the intergalactic medium Dynamics of the sweeping of interstellar clouds from a rotating galaxy as it moves in the intergalactic medium

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983afz....19..471k&link_type=abstract

(Astrofizika, vol. 19, July-Sept. 1983, p. 471-482) Astrophysics (ISSN 0571-7132), vol. 19, no. 3, Jan. 1984, p. 263-270. Transl

Astronomy and Astrophysics

Astrophysics

4

Celestial Mechanics, Galactic Rotation, Intergalactic Media, Interstellar Gas, Disk Galaxies, Equations Of Motion, Galactic Clusters

Scientific paper

The dynamical interaction of interstellar clouds in a disk-shaped galaxy with the intergalactic medium is studied for arbitrary orientation of the rotation axis of the galaxy relative to the direction of motion of the disk. It is shown that the clouds are swept out in a time less than about the acceleration time. In the same time scale the equilibrium of the inner regions of the gas layer, which are stable against the dynamic pressure, must be appreciably disturbed. The efficiency of the sweeping process decreases with increasing degree of concentration of mass toward the center of the galaxy. The angle of inclination of the rotation axis of the disk to the direction of its motion at which the process is most effective depends on the degree of concentration of the mass toward the plane of the disk and, in the general case, is nonzero. It is concluded that the sweeping of dense molecular clouds from massive galaxies has a low probability.

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