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VLA Observations of Neutral Hydrogen in Compact Groups

Published online by Cambridge University Press:  25 May 2016

B.A. Williams ,
J.H. Van Gorkom ,
Min Yun  and
Lourdes Verdes-Montenegro
B.A. Williams
Affiliation:
Physics and Astronomy Dept., University of Delaware, Newark, Delaware, 19716, USA
J.H. Van Gorkom
Affiliation:
Astronomy Dept, Columbia University, 538 W. 120th Street, New York, NY 10027, USA
Min Yun
Affiliation:
NRAO P. O. Box 0, Soccorro, NM 87801, USA
Lourdes Verdes-Montenegro
Affiliation:
Instituto de Astrofisica de Andalucia, CSIC, Apda 3004, 18080 Granada, Spain

Abstract

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VLA images of the neutral hydrogen (HI) in the direction of HCG 2, 16, 33, 88, and 92 (Stephan's Quintet) are examined. In HCG 2 and 16, the HI gas is bound to the individual galaxies but shows definite signs of tidal interaction; while in HCG 92, the more compact configuration, the HI gas is contained within a few prominent cloud features well displaced from the optical positions of any of the spiral members. In every case, the motions of the gas are consistent with the motions of the galaxies within the Hickson groups. A range of kinematical properties is observed for the HI gas, from well-ordered rotation, to small-scale systematic gradients within the cloud features.

Type
Groups & Clusters
Information
Symposium - International Astronomical Union , Volume 186: Galaxy Interactions at High and Low Redshift , 1999 , pp. 375 - 382
Copyright
Copyright © Kluwer 1999 

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