NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-10 T02:30:08 PST
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For refcode 1990ApJ...360....1V:
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Copyright by American Astronomical Society. Reproduced by permission
1990ApJ...360....1V DETECTING THE LARGEST MAGNETS: THE UNIVERSE AND THE CLUSTERS OF GALAXIES J. P. VALLEE Received 1989 December 6; accepted 1990 March 2 ABSTRACT Recently, a large sample of rotation measures of galaxies and quasars at various redshifts has been published. This data set has been employed so far for detecting a magnetic field component of about 1.5 {mu}G in the Virgo Supercluster and for placing an upper limit of 0.1 {mu}G for a magnetic field in the Great Attractor Supercluster. Here this data set will be used to test for the existence of an uniform component of a cosmic/intergalactic magnetic field outside clusters of galaxies. From a total of 309 galaxies and quasars with a known redshift and a small intrinsic rotation measure value, an upper limit of about 2 rad m^-2^ is obtained for such a cosmic/intergalactic contribution out to a redshift z of 3.6. From this result, and a mean density of 10^-5^ cm^-3^, an upper limit of 6 x 10^-12^ G follows for the strength of such a cosmic/intergalactic magnetic field outside clusters of galaxies, or an upper limit of 6 x 10^-11^ G for a mean density of 10^-6^ cm^-3^. Subject headings: cosmology - galaxies: clustering - galaxies: intergalactic medium - magnetic fields
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