Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..68..459b&link_type=abstract
Astrophysics and Space Science, vol. 68, no. 2, Apr. 1980, p. 459-467.
Astronomy and Astrophysics
Astrophysics
1
Explosions, Galactic Evolution, Galactic Nuclei, Gas Flow, Spiral Galaxies, Equations Of Motion, Gas Temperature
Scientific paper
The problem of post-explosive gas depletion in the central region of normal spiral galaxies like our own has been investigated. It has been calculated that with a plausible density law and with some restriction on gas temperature, a sufficient quantity of gas will be depleted from the central region over a time-scale ranging from a few times 1O~ to a few times 108 years, the exact time depending on the particular density law. Such a time-scale has been suggested by many authors as the period for one phase of activity in the nuclei of these galaxies. A similar time-scale has also been proposed by several authors as that for the formation and destruction of the spiral patterns of these galaxies
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