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H I deficiency in cluster spiral galaxies - Dependence on galaxy size

Monica, Valluri and Jog, Chanda J (1991) H I deficiency in cluster spiral galaxies - Dependence on galaxy size. In: Astrophysical Journal, 374 (1). 103 -111.

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Official URL: http://adsabs.harvard.edu/doi/10.1086/170100

Abstract

From the available H I data on spiral galaxies in three rich Abell clusters and the Virgo Cluster, it is shown that galaxies with medium to large optical sizes tend to be more severely deficient in atomic hydrogen than the small galaxies. This is so both in terms of the fractional number of galaxies that are deficient and the amount of gas lost by a galaxy. The fraction of H I-deficient galaxies increases with size over most of the size range, saturating or dropping only for the largest galaxies. A comparative study is made of various currently accepted gas removal mechanisms, namely those which are a result of galaxy-intracluster medium interactions, e.g., ram pressure stripping, as well as those due to galaxy-galaxy interactions, i.e., collisions and tidal interactions. It is shown that, with the exception of tidal interactions, all of these mechanisms would produce a size dependence in H I deficiency that is the opposite of that observed. That is, the gas in the largest galaxies would be the least affected by these mechanisms. However, if there is significant mass segregation, these processes may give the trends observed in the size dependence of H I deficiency.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to University of Chicago Press.
Keywords: Abundance;Galactic Cluster;Galactic Structure;Hydrogen Atoms, Interstellar Gas;Spiral Galaxies;Galactic Evolution, Interacting Galaxies;Interstellar Matter.
Department/Centre: Division of Physical & Mathematical Sciences > Joint Astronomy Programme
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 19 Nov 2010 04:31
Last Modified: 19 Nov 2010 04:31
URI: http://eprints.iisc.ernet.in/id/eprint/33867

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