Optical studies of galaxies in clusters. Observations of spirals in Virgo. III.

Details Optical studies of galaxies in clusters. Observations of spirals in Virgo. III. Optical studies of galaxies in clusters. Observations of spirals in Virgo. III.

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26as..110..279s&link_type=abstract

Astronomy and Astrophysics Supplement, v.110, p.279

Astronomy and Astrophysics

Astrophysics

24

Galaxies: Spirals, Galaxies: Kinematics And Dynamics, Clusters Of Galaxies, Virgo

Scientific paper

We present the analysis of the rotation curves of a sample of 32 spiral galaxies derived from the spectroscopic observations of a sample of 47 galaxies. For 15 galaxies we were either unable to detect emission lines or measure a reasonably good rotation curve. Of the 32 rotation curves 23 are of galaxies member of the Virgo Cluster and 9 selected from the "field". Analysis of mass and density distribution have been obtained. The mass distribution of cluster galaxies belongs to the Type III proposed by Burstein & Rubin (1985) with few exceptions (NGC 4519 Type I, NGC 2280, NGC 4189, NGC 5861, NGC 6070 Type II) and, is unrelated to the morphological type. Density distribution curves from equidensity surface spheroids model, computed for the Virgo sample, result to be primarily composed of three classes. Rotation curves, none of which shows a peculiar trend, have been parametrized using the criteria introduced by Whitmore et al. (1984). The clustercentric distance of Virgo spirals does not correlate neither with OG nor with OGML in agreement with the findings of Distefano et al. (1990) and Amram et al. (1993, 1994) for other clusters.

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