On the origin of the radio halo in the Coma cluster of galaxies.

Details On the origin of the radio halo in the Coma cluster of galaxies. On the origin of the radio halo in the Coma cluster of galaxies.

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ncimb.105..845k&link_type=abstract

Nuovo Cimento B, Vol. 105, No. 8/9, p. 845 - 856

Physics

3

Radio Halos: Clusters Of Galaxies, Coma: Clusters Of Galaxies

Scientific paper

The origin of the radio halo in the Coma cluster is discussed. Particular attention is paid to the galactic wake theory: the wakes are assumed to be turbulent and able to reaccelerate particles via either first-order Fermi or the Eilek-Henriksen mechanism. The expected energetics driven from the theory is in good agreement with the observed data. The need for particle acceleration processes, especially first-order Fermi type, is emphasized. The rarity of Coma-type radio halos is considered to be due to either an insufficient particle supply or to the fact that particles in their ICM are not old (<1010y) enough to produce a halo as extended as that in the Coma cluster of galaxies.

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