Spiral galaxies in clusters. III. Gas-rich galaxies in the Pegasus I cluster of galaxies

Journal Article · Sat May 01 00:00:00 EDT 1982 · Astron. J.; (United States)

OSTI ID:5496845

Bothun, G D; Schommer, R A; Sullivan, III, W T

We report the results of a 21-cm and optical survey of disk galaxies in the vicinity of the Pegasus I cluster of galaxies. The color--gas content relation (log(M/sub H//L/sub B/) vs (B-V)/sup T//sub 0/ ) for this particular cluster reveals the presence of a substantial number of blue, gas-rich galaxies. With few exceptions, the disk systems in Pegasus I retain large amounts of neutral hydrogen despite their presence in a cluster. This directly shows that environmental processes have not yet removed substantial amounts of gas from these disk galaxies. We conclude that the environment has had little or no observable effect upon the evolution of disk galaxies in Pegasus I. The overall properties of the Pegasus I spirals are consistent with the suggestion that this cluster is now at an early stage in its evolution.

• Research Organization: University of Washington, Seattle, Washington 98195 and Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138
• OSTI ID: 5496845
• Journal Information: Astron. J.; (United States), Vol. 87:5
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GALAXY CLUSTERS
COSMIC GASES
GALACTIC EVOLUTION
PHOTOMETRY
FLUIDS
GASES
640105* - Astrophysics & Cosmology- Galaxies