Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...357..367v&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 357, July 10, 1990, p. 367-372.
Astronomy and Astrophysics
Astrophysics
32
Disk Galaxies, Galactic Clusters, H I Regions, Interacting Galaxies, Interstellar Matter, Virgo Galactic Cluster, Hydrogen Atoms, Interstellar Gas, Optical Properties, Spiral Galaxies
Scientific paper
There is sufficient observational evidence to show that many Virgo Cluster spirals are H I deficient in their inner disks (in addition to being H I deficient globally, as previously established). It is shown here that collisions between galaxies in a cluster can lead to the removal of H I gas from these galaxies while leaving the H2 gas, undisturbed. This follows directly from the application of the Spitzer-Baade collisional gas removal mechanism to galaxies consisting of stars and a two-component ISM consisting of H I and H2, with H I having the largest filling factor. This can account for both the observed H I deficiency in the inner regions and the normal H2 content of these galaxies. The frequency of galaxy collisions in the Virgo Cluster is shown to be large enough to make collisional gas removal a viable mechanism.
Jog Chanda J.
Valluri Monica
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