Environmental effects on gaseous disks of Virgo spiral galaxies

Details Environmental effects on gaseous disks of Virgo spiral galaxies Environmental effects on gaseous disks of Virgo spiral galaxies

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577..301n&link_type=abstract

In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A

Physics

Galaxies: Clusters: Individual (Virgo), Galaxies: Ism, Ism: Molecules, Radio Lines: Ism

Scientific paper

We present the results of 12CO (J=1-0) observations of five Virgo spiral galaxies obtained with the Nobeyama 45-m telescope equipped with a multi-beam receiver, BEARS. We combined these CO data with the H I data to address the environmental effect on the gaseous disks. We investigated a relationship between the molecular fraction (fmol) and the total gaseous density (H I plus H2 density, ΣHI+H2). We found that three of our samples displays unusually larger fmol than that expected for the field galaxies, while the rest two galaxies show the normal fmol. It implies that the ram-pressure stripping occurs at the inner disks to result in unusually large fmol as one possibility.

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