NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-23 T19:44:54 PDT
Help | Comment | NED Home

For refcode 1989ApJ...339..657F:
Retrieve 98 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1989ApJ...339..657F THE DISTRIBUTION OF MASS FOR SPIRAL GALAXIES IN CLUSTERS AND IN THE FIELD DUNCAN A. FORBES AND BRADLEY C. WHITMORE Space Telescope Science Institute Received 1988 March 11; accepted 1988 September 14 ABSTRACT A comparison is made between the mass distributions of spiral galaxies in clusters and in the field using Burstein's mass-type methodology. Both H{alpha} emission-line rotation curves and more extended H I rotation curves are used. The fitting technique for determining mass types used by Burstein and coworkers has been replaced by an objective {chi}^2^ method. Mass types are shown to be a function of both Hubble type and luminosity, contrary to earlier results. The present data show a difference in the distribution of mass types for spiral galaxies in the field and in clusters, in the sense that mass type I galaxies, where the inner and outer velocity gradients are similar, are generally found in the field rather than in clusters, as Burstein and coworkers previously reported. This can be understood in terms of the results of Whitmore, Forbes, and Rubin, who find that the rotation curves of galaxies in the central region of clusters are generally falling, while the outer galaxies in a cluster and field galaxies tend to have flat or rising rotation curves. Subject headings: galaxies: clustering - galaxies: internal motions - galaxies: structure
Retrieve 98 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home