Abstract
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 107 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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Bhattacharyya, T. A note on the post-explosion gas depletion in the central region of normal spiral galaxies. Astrophys Space Sci 68, 459–467 (1980). https://doi.org/10.1007/BF00639710
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DOI: https://doi.org/10.1007/BF00639710