Discovery of a Radio Halo Source in Abell 2163

Details Discovery of a Radio Halo Source in Abell 2163 Discovery of a Radio Halo Source in Abell 2163

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.5307h&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #53.07; Bulletin of the American Astronomical Society, Vol. 26, p.1403

Astronomy and Astrophysics

Astronomy

21

Scientific paper

The cluster of galaxies Abell 2163 is exceptional in its X-ray luminosity (L_{X(0.5-4.5keV)} ~ 1.2 times 10(45) h(-2) erg s(-1) ), which arises from the hottest known X-ray atmosphere (kT ~ 14 keV; Arnaud et al., ApJ, 390, 345). Our observations of the cluster with the VLA show that it is also exceptional in the radio band: it hosts a halo of size ~ 1.2 h(-1) Mpc, which makes it the largest such source. Its bolometric luminosity of 1.2times 10(42) h(-2) ergs(-1) (from 10MHz to 10GHz, emitted) is an order of magnitude larger than that of the most luminous radio halo reported previously. As much as 10% of the cluster's X-ray luminosity in the 0.5-4.5keV band may be produced by the inverse-Compton scattering of cosmic microwave background photons by the halo's relativistic electrons.

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