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Interactions among Active Galaxies: An HI Perspective

Published online by Cambridge University Press:  26 May 2016

Jeremy Lim ,
Cheng-Yu Kuo ,
Wen-Shuo Liau ,
Jenny Greene  and
Paul T. P. Ho
Jeremy Lim
Affiliation:
Institute of Astronomy & Astrophysics, Academia Sinica, Taiwan
Cheng-Yu Kuo
Affiliation:
Institute of Astronomy & Astrophysics, Academia Sinica, Taiwan
Wen-Shuo Liau
Affiliation:
Department of Physics, National Taiwan University, Taiwan
Jenny Greene
Affiliation:
Smithsonian Astrophysical Observatory, Cambridge, USA
Paul T. P. Ho
Affiliation:
Smithsonian Astrophysical Observatory, Cambridge, USA

Abstract

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Galaxy-galaxy interactions is one of the leading candidates for triggering nuclear activity in galaxies. Such interactions are thought to be able to bring a fresh supply of gas to the center of a galaxy to fuel its resident supermassive black hole. Optical observations, however, do not reveal direct evidence for interactions among the majority of active galaxies. on the other hand, neutral atomic hydrogen (HI) gas has proven to be an exquisite tracer of galaxy-galaxy interactions, even when no such interactions are visible in the optical. Here, we describe our systematic HI imaging surveys of galaxies hosting active galactic nuclei (AGNs) and quasi-stellar objects (QSOs), and present a few illustrative results.

Type
Part 3. Ejection and Outflow
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 424 - 425
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Véron-Cetty, M. P. & Véron, P. A. 1998, A Catalogue of Quasars and Active Galactic Nuclei (ESO Sci. Rept.) (8th ed.; Garching: ESO)Google Scholar