Tidal generation of active spirals and S0 galaxies by rich clusters

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168362· OSTI ID:7135236

Byrd, G; Valtonen, M ^[1]

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1. Alabama Univ., Tuscaloosa (USA) Turku Univ. (Finland)

Gavazzi and Jaffe found that late-type spiral galaxies in rich clusters are radio sources 10 times more powerful than spirals outside clusters. Gavazzi and Jaffe propose that ram pressure from the cluster medium causes collapse of dense molecular clouds, star formation, and other activity in the spirals disks. Bothun and Dressler similarly explain blue H I poor disk galaxies found in the central regions of the Coma Cluster via ram pressure effects. With computer simulations, it is shown in the present work that the tidal field of the cluster as a whole is physically sufficient to trigger cluster spiral nuclear and disk activity. It is shown that tidally induced collisions of disk gas clouds should be much more effective than ram pressure in causing activity. The observed tendency for disk galaxies in centers of rich clusters to be barred and S0 is explained as due to the cluster tidal field. Metals in the cluster medium would be enhanced by the expulsion of spirals enriched gas via tidally induced activity. 36 refs.

• OSTI ID: 7135236
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 350; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BASIC INTERACTIONS
CHEMICAL COMPOSITION
COMPUTERIZED SIMULATION
CONFIGURATION
COSMIC GASES
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ENVIRONMENT
FLUID FLOW
FLUIDS
GALACTIC EVOLUTION
GALAXIES
GALAXY CLUSTERS
GALAXY NUCLEI
GAS FLOW
GASES
GRAVITATIONAL INTERACTIONS
INTERACTIONS
PERTURBATION THEORY
RADIATIONS
RADIOWAVE RADIATION
SEYFERT GALAXIES
SIMULATION
SPIRAL CONFIGURATION