Low-frequency radio observations of poor clusters of galaxies

Details Low-frequency radio observations of poor clusters of galaxies Low-frequency radio observations of poor clusters of galaxies

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86..806h&link_type=abstract

Astronomical Journal, vol. 86, June 1981, p. 806-810.

Astronomy and Astrophysics

Astronomy

3

Astronomical Spectroscopy, Galactic Clusters, Radio Galaxies, Data Reduction, Energy Spectra, Low Frequencies, X Ray Sources

Scientific paper

Observations have been made at the Clark Lake Radio Observatory of 16 poor clusters of galaxies at 34.3 MHz. Four of the poor clusters were detected at flux densities greater than 20 Jy. The spectra of the four detected clusters are all rather steep. Two of the detected clusters, AWM 4 and AWM 5, are also known to be X-ray sources. The possibility that the X-ray-emitting gas is heated by Coulomb interactions with the relativistic electrons responsible for the radio emission is investigated, and it is found that the observed X-ray luminosities can be accounted for if the electron energy spectrum extends to very low energies (gamma approximately 1-10). Collective plasma effects may increase the heating efficiency and eliminate the need to extrapolate the electron energy spectrum to such low values.

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