X-ray clusters and the electromagnetic spectrum of galaxies

Details X-ray clusters and the electromagnetic spectrum of galaxies X-ray clusters and the electromagnetic spectrum of galaxies

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....93..171b&link_type=abstract

Astronomy and Astrophysics, vol. 93, no. 1-2, Jan. 1981, p. 171-177.

Astronomy and Astrophysics

Astronomy

1

Astronomical Spectroscopy, Electromagnetic Spectra, Galactic Clusters, Galactic Radiation, Spiral Galaxies, X Ray Sources, Luminosity, Particle Acceleration, Radio Astronomy, Radio Spectra

Scientific paper

As a galaxy enters the dense inner zone of an X-ray cluster, the hot outside gas will interact with its halo. The physical conditions may be favorable for large-scale plasma instabilities to arise and produce a turbulent magnetic fluctuation spectrum. Once this is accepted, a simple theory for the spectrum predicts substantial acceleration for the electrons in the halo, leading to a large bulge in the usual power law spectrum at frequencies greater than approximately 1 GHz. For example, spirals should switch on soon after entering the cluster and lose their enhanced radio luminosity more slowly as they leave. The spatial distribution of brightness in the cluster core should check the theory.

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