ROSAT observations and correlated X-ray, radio, and optical features in cluster cooling flows.

Details ROSAT observations and correlated X-ray, radio, and optical features in cluster cooling flows. ROSAT observations and correlated X-ray, radio, and optical features in cluster cooling flows.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..561s&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 561 - 564

Astronomy and Astrophysics

Astrophysics

1

Clusters Of Galaxies: Radio Jets, Clusters Of Galaxies: Radio Sources, Clusters Of Galaxies: X Rays, Clusters Of Galaxies: Cooling Flows

Scientific paper

ROSAT images of the central regions of cluster cooling flows are compared to optical continuum and radio continuum images. The radio sources associated with cooling flows show two distinct morphologies. In most sources, the jets appear to be inflating distinct lobes of radio plasma. These source show strong Faraday rotation, radio pressures in agreement with the X-ray gas pressure, and a radio-X-ray spatial anticorrelation. A few cooling flow radio sources (e.g. PKS 0745-191 and 2A 0335+096) have amorphous radio morphologies, Faraday depolarization, low radio pressures, and a possible radio-X-ray spatial correlation. These properties all suggest that the radio jets are completely disrupted and that the radio plasma is mixed with the thermal X-ray plasma. In the optical, the blue continuum lobes seen in several nearby cooling flow central galaxies with strong radio sources are of particular interest. These might be due to star formation induced by the hydrodynamical effects of the radio source, or due to scattered light from beamed emission from the active galactic nucleus. X-ray observations and optical polarization measurements suggest that both mechanisms may occur.

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