The H I properties of spiral galaxies in the Virgo cluster. IV - Westerbork observations of 12 field galaxies

Details The H I properties of spiral galaxies in the Virgo cluster. IV - Westerbork observations of 12 field galaxies The H I properties of spiral galaxies in the Virgo cluster. IV - Westerbork observations of 12 field galaxies

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...73..453w&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 73, no. 3, June 1988, p. 453-470. ZWO-supported research.

Astronomy and Astrophysics

Astronomy

19

Galactic Structure, Hydrogen Atoms, Spatial Distribution, Spiral Galaxies, Virgo Galactic Cluster, Galactic Evolution, Line Spectra, Radio Astronomy, Space Density

Scientific paper

Results are presented of one-dimensional H I observations of 12 spiral galaxies in a low galaxy-density environment, ("field galaxies") made with the Westerbork Synthesis Radio Telescope. The results have been collected in the form of an atlas, containing for each galaxy a position-velocity diagram, the H I distribution projected upon the resolution axis of the observation, the H I global profile, and the distribution of the H I surface density. Most of the galaxies show a more or less symmetrical H I distribution, which, at the level of 1.0 M_sun;pc-2, extends beyond the optical image. The distribution of the gas in UGC 7941 is limited to its optical dimensions; in addition the H I in this galaxy seems to be more asymmetrically distributed than in the average field galaxy. The results for the galaxy NGC 2654 indicate a very extended distribution of the H I gas, with a diameter of 12 arcmin (at the level of 0.3 M_sun;pc-2, while its optical dimensions are 4.3 by 0.9 arcmin.

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