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HI Absorption as a Tracer of Nuclear Rings in Galaxies

Published online by Cambridge University Press:  12 April 2016

Bärbel Koribalski
Bärbel Koribalski*
Affiliation:
Australia Telescope National Facility (CSIRO), P. O. Box 76, Epping, NSW 2121, Australia

Abstract

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H ɪ absorption measurements against strong continuum background sources are an excellent tool to study the cold ISM in the line of sight to the object (e.g. pulsars, galaxies, quasars). Here we present a brief overview of such studies against the nuclear region of starburst galaxies. The high angular resolution provided by synthesis telescopes allows us to resolve the central region of nearby galaxies and thus investigate the gas kinematics close to the nucleus. The detection of fast-rotating nuclear rings is related to the bars in these galaxies which in turn might have been triggered by tidal galaxy-galaxy interactions.

Type
Part III. Observations of Barred Galaxies: Gas Distributions, Kinematics
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 172 - 178
Copyright
Copyright © Astronomical Society of the Pacific 1996

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