Exposing the Dwarf Irregular UGC 7636 : Stripping at Work in the Virgo Cluster

Details Exposing the Dwarf Irregular UGC 7636 : Stripping at Work in the Virgo Cluster Exposing the Dwarf Irregular UGC 7636 : Stripping at Work in the Virgo Cluster

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.9001l&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #90.01; Bulletin of the American Astronomical Society, Vol. 31, p.1508

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the results of optical spectroscopy of a newly discovered H II region residing in the H I gas cloud located between the dwarf irregular galaxy UGC 7636 and the giant elliptical galaxy NGC 4472 in the Virgo Cluster. A comparison of the properties of UGC 7636 with nearby dwarf irregulars shows that (1) the oxygen abundance of the cloud agrees with that expected for a galaxy with the blue luminosity of UGC 7636, and (2) M{H I}/LB for UGC 7636 becomes consistent with the measured oxygen abundance of the cloud if the H I mass of the cloud is added back into UGC 7636. We conclude that our measurement of the chemical properties of the H I cloud is strong evidence that the ``isolated'' gas is in fact the stripped interstellar medium of UGC 7636.

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