Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99..459v&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 99, Feb. 1990, p. 459-462.
Astronomy and Astrophysics
Astronomy
44
Galactic Rotation, Interstellar Magnetic Fields, Virgo Galactic Cluster, Intergalactic Media, Linear Polarization, Polarized Light, Quasars, Red Shift
Scientific paper
A search of the Broten et al. (1988) all-sky rotation-measure (RM) catalog for galaxies and quasars resulted in a possible discovery of a cluster-wide magnetic field in the Virgo Supercluster, with a magnetic field intensity near 1.5 microG consistent with an RM excess of -10 rad/sq m. The magnetic energy density of a 1.5 microG field is about 10 to the -13 ergs/cu cm, comparable to the energy density in the 2.7 K cosmic blackbody radiation of 5 x 10 to the -13th ergs/cu cm. The energetic implications for a 1.5 microG cluster-wide field in Virgo are also reasonable in view of the current theoretical models predicting such large-scale magnetic fields in cluster of galaxies.
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