Environmental Effects on Gaseous Disks of the Virgo Spiral Galaxies

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dc.creatorNakanishi, Hiroyuki
dc.creatorKuno, Nario
dc.creatorSofue, Yoshiaki
dc.creatorSato, Naoko
dc.creatorNakai, Naomasa
dc.creatorShioya, Yasuhiro
dc.creatorTosaki, Tomoka
dc.creatorOnodera, Sachiko
dc.creatorSorai, Kazuo
dc.creatorEgusa, Fumi
dc.creatorHirota, Akihiko
dc.date2006-10-27
dc.date.accessioned2026-07-07T10:40:39Z
dc.date.available2026-07-07T10:40:39Z
dc.descriptionWe found high molecular fractions ($f_{\rm mol}$; ratio of the molecular to total gas surface densities) in three of five Virgo spiral galaxies in spite of their low total gas column density, based on $^{12}$CO$(J=1-0)$ observations with the Nobeyama 45 m telescope equipped with a multi-beam receiver, BEARS. We interpret this as a result of environmental effects. Combining the CO data with HI data, the relationship between the surface density of the total gas (HI plus H$_2$) and $f_{\rm mol}$ indicates that the three galaxies near the cluster center have larger $f_{\rm mol}$ values than expected for field galaxies, while the others show normal $f_{\rm mol}$. The large $f_{\rm mol}$ is interpreted as being due either to effective HI gas stripping, even in the inner disks, or to large ISM pressure induced by the high ICM pressure and/or ram pressure, although the possibility of an unusually high metallicity cannot be ruled out.
dc.description12 pages, 8 figures. To appear in ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0610820
dc.identifierhttp://arxiv.org/abs/astro-ph/0610820
dc.identifierAstrophys.J.651:804-810,2006
dc.identifierdoi:10.1086/507974
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181395
dc.subjectAstrophysics
dc.titleEnvironmental Effects on Gaseous Disks of the Virgo Spiral Galaxies
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