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HI absorption in Radio Galaxies

Published online by Cambridge University Press:  26 May 2016

R. Morganti ,
T.A. Oosterloo ,
G. van Moorsel ,
C.N. Tadhunter  and
N. Killeen
R. Morganti
Affiliation:
Netherlands Foundation for Research in Astronomy, Postbus 2, 7990 AA, Dwingeloo, The Netherlands
T.A. Oosterloo
Affiliation:
Netherlands Foundation for Research in Astronomy, Postbus 2, 7990 AA, Dwingeloo, The Netherlands
G. van Moorsel
Affiliation:
National Radio Astronomy Observatory, Socorro, NM 87801, USA
C.N. Tadhunter
Affiliation:
Dept. Physics, University of Sheffield, Sheffield S3 7RH, UK
N. Killeen
Affiliation:
Netherlands Foundation for Research in Astronomy, Postbus 2, 7990 AA, Dwingeloo, The Netherlands

Abstract

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Twenty-two powerful radio galaxies have been searched for HI absorption. We find the highest probability of detecting HI in absorption among narrow-line compact (or small) galaxies or galaxies with indication of richer interstellar medium (i.e. with ongoing or recent star-formation). We discuss the difficulty in the interpretation of the origin of the HI absorption due to the uncertainty in the systemic velocity of the galaxies.

Type
Part 2: Extra Galactic Neutral Hydrogen and Cosmology
Information
Symposium - International Astronomical Union , Volume 199: The Universe at Low Radio Frequencies , 2002 , pp. 118 - 121
Copyright
Copyright © Astronomical Society of the Pacific 2002 

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