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Theoretical Models to Explain the Variable 21 cm Absorption Spectrum in AO 0235+164

Published online by Cambridge University Press:  14 August 2015

A. M. Wolfe
A. M. Wolfe*
Affiliation:
Department of Physics, University of Pittsburgh, Pittsburgh, PA 15260

Extract

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The variability of the highly redshifted 21 cm absorption spectrum in AO 0235+164 presents us with two essential facts. First, rapid changes occur in the line depths of foreground clouds with redshift z ≃ 0.524. Second, the background radio source is among the most violently variable objects known. Thus it is reasonable to suppose that changes in the lines stem from activity in the background BL Lac object. The question is how?

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 97: Extragalactic Radio Sources , 1982 , pp. 313 - 315
Copyright
Copyright © Reidel 1982 

References

Cohen, M H. and Unwin, S. C., 1982, this volume, p. 345.Google Scholar
Cotton, W., 1981, private communication.Google Scholar