Rotation curves for spiral galaxies in clusters. I - Data, global properties, and a comparison with field galaxies

Abstract

view Abstract Citations (76) References (47) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Rotation Curves for Spiral Galaxies in Clusters. I. Data, Global Properties, and a Comparison with Field Galaxies Rubin, Vera C. ; Whitmore, Bradley C. ; Ford, W. Kent, Jr. Abstract Rotational velocities are presented for 21 galaxies in four large spiral-rich clusters: Cancer, Hercules, Peg I, and DC 1842-63. Although the global properties (luminosity, radius, maximum rotation velocity, and mass) of the cluster sample are similar to those of the field spirals, differences are found. The larger, brighter, more massive spirals which are rare in the field are absent in the cluster spirals studied here. Most galaxies of normal morphology have rotation curves of normal form; most galaxies of peculiar morphology have peculiar rotation curves, but counterexamples exist. The most common peculiarities are falling rotation curves. For all (nine) Sa and Sb galaxies, the amplitudes of the rotation curves are lower than those of their field counterparts. Diminished internal extinction in cluster galaxies is one possible explanation. Galaxies which are H I deficient appear to have rotation curves which are most depressed in comparison with field spirals of equivalent Hubble types and luminosities. Larger overlapping samples of field, cluster, optical, and 21 cm observations are necessary to produce conclusions of higher statistical weight. Publication: The Astrophysical Journal Pub Date: October 1988 DOI: 10.1086/166764 Bibcode: 1988ApJ...333..522R Keywords: Galactic Mass; Galactic Rotation; Galactic Structure; Interstellar Matter; Spiral Galaxies; Virgo Galactic Cluster; Angular Velocity; Dynamic Characteristics; H I Regions; H Ii Regions; Morphology; Astrophysics; GALAXIES: CLUSTERING; GALAXIES: DISTANCES; GALAXIES: INTERNAL MOTIONS; GALAXIES: INTERSTELLAR MATTER; GALAXIES: STRUCTURE full text sources ADS | data products SIMBAD (25) NED (22) Related Materials (1) Part 2: 1988ApJ...333..542W