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21-cm Probes of Redshifted Clouds

Published online by Cambridge University Press:  14 August 2015

A. M. Wolfe
A. M. Wolfe*
Affiliation:
University of California, San Diego and University of Pittsburgh

Extract

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21 cm studies, carried out with the 305 m telescope at Arecibo, of absorption-line clouds in QSOs have resulted in the following discoveries: (a) A search for 21 cm absorption in redshift systems selected for exhibiting Mg II/Fe II absorption in radio-bright QSOs resulted in the detection of a z ≈ 0.4 21 cm line in PKS 1229–02; (b) the detection of 21 cm absorption at z ≈ 1.8 in MC3 1331+170; and (c) the discovery of 21 cm emission from regions ~ 100 kpc distant from the ScI galaxy NGC 628, that occurred during a search for outlying H I in a complete sample of spiral galaxies.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 92: Objects of High Redshift , 1980 , pp. 153 - 159
Copyright
Copyright © Reidel 1980 

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