Imaging the Radio Halo in the Abell 2256 Cluster of Galaxies

Details Imaging the Radio Halo in the Abell 2256 Cluster of Galaxies Imaging the Radio Halo in the Abell 2256 Cluster of Galaxies

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jkas...32...75k&link_type=abstract

Journal of the Korean Astronomical Society, vol. 32, no. 2, pp. 75-82

Astronomy and Astrophysics

Astronomy

7

Galaxies: Clustering, Galaxies: Intergalactic Medium, Galaxies: X-Rays, Magnetic Fields, Radio Sources: Galaxies

Scientific paper

Diffuse radio emission in Abell 2256 was detected above 3 sigma with DRAO observations at 1420 MHz. The halo size is 13'X10' ( 1h50^{-1} Mpc) in full extent and is elongated along a position angle of about 112 degree. The total flux density contained in the halo is 30 +/- 10 mJy at 1420 MHz and its spectral index is -2.04 +/- 0.04, showing no evidence for steepening up to 1420 MHz. Using the size estimate, yields a more reliable equipartition magnetic field strength which is 0.34(1+k)^{2/7} micro G. In addition, five new radio sources are identified.

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