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Quasar Rotation Measures and Optical Absorption Spectra—What Can We Learn About Cosmic Magnetic Fields?

Published online by Cambridge University Press:  19 July 2016

Judith J. Perry ,
Philipp P. Kronberg  and
Alan M. Watson
Judith J. Perry
Affiliation:
Institute of Astronomy Madingley Road Cambridge CB3 0HA United Kingdom
Philipp P. Kronberg
Affiliation:
University of Toronto 60 St George Street Toronto M55 1A1 Canada
Alan M. Watson
Affiliation:
Astronomy Centre University of Sussex Brighton BN1 9QH United Kingdom

Abstract

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This paper reviews early attempts to deduce important constraints on the magnetic fields of high-redshift objects through a study of the rotation measure (RM) of QSOs. We have combined detailed studies of RM and optical spectra of 48 QSOs and have statistically analysed RM data on 116 objects and conclude that the objects which give rise to QSO metal-line absorption are also responsible for the observed extragalactic component of RM. This allows us to estimate their average magneto-ionic properties.

Type
10. Magnetic Fields at High Redshifts and in the Early Universe
Information
Symposium - International Astronomical Union , Volume 140: Galactic and Intergalactic Magnetic Fields , 1990 , pp. 513 - 517
Copyright
Copyright © Kluwer 1990 

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