Discovery of intergalactic radio emission in the Coma-A1367 supercluster

Details Discovery of intergalactic radio emission in the Coma-A1367 supercluster Discovery of intergalactic radio emission in the Coma-A1367 supercluster

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.341..720k&link_type=abstract

Nature (ISSN 0028-0836), vol. 341, Oct. 26, 1989, p. 720-723. Research supported by NSERC.

Astronomy and Astrophysics

Astronomy

139

Extragalactic Radio Sources, Galactic Clusters, Astronomical Maps, Field Strength, Magnetic Fields, Synchrotron Radiation, Voids

Scientific paper

The detection of faint, supercluster-scale radio emission at 326 MHz that extends between the Coma cluster of galaxies and the Abell 1367 cluster and which is apparently not associated with any individual galaxy system in the complex is described. The radiation's synchrotron origin implies the existence of a large-scale intercluster magnetic field with an estimated strength of 0.3-0.6 microgauss, which is remarkably strong. The synchrotron-emitting relativistic electrons cannot be older than a few times 10 to the 8th yr. It is speculated that the magnetic field is the fossil of a pregalactic primeval field which was amplified in the course of the formation of intergalactic voids and superclusters.

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