Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96..851g&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 96, Sept. 1988, p. 851-866.
Astronomy and Astrophysics
Astronomy
97
Galactic Rotation, H I Regions, Spiral Galaxies, Very Large Array (Vla), Virgo Galactic Cluster, Angular Resolution, Image Processing, Mass Distribution, Radial Velocity
Scientific paper
H I rotation curves have been presented and analyzed for 21 bright spirals in the center of the Virgo Cluster. The curves look similar to those of spirals in the field in that the great majority of them are flat or still rising at the Holmberg radius. A detailed comparison with synthetic curves derived from field spirals shows good agreement. The main conclusion is that the mass distribution in spirals is not affected in an obvious way by their environment. The authors' sample contains the most hydrogen-deficient spirals in the Virgo Cluster. A few galaxies very close to the cluster center have lost their H I to within almost the turnover point of the rotation curve. In spite of this, the Tully-Fisher relation derived for the sample does not differ significantly from the ones derived from larger samples containing fewer H I-deficient galaxies; thus the relation can probably be used safely for cluster spirals.
Balkowski Ch.
Guhathakurta Puraga
Kotanyi C. G.
van Gorkom Jacqueline H.
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