NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-26 T14:53:25 PDT
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For refcode 2000ApJ...530..719W:
Retrieve 8 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2000ApJ...530..719W X-Ray-emitting Atmospheres of B2 Radio Galaxies D. M. Worrall and M. Birkinshaw Department of Physics, University of Bristol, Bristol, UK; and Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138; d.worrall@bristol.ac.uk Received 1999 July 9; accepted 1999 October 4 ABSTRACT We report ROSAT PSPC spatial and spectral analyses of the eight B2 radio galaxies NGC 315, NGC 326, 4C 35.03, B2 0326+39, NGC 2484, B2 1040+31, B2 1855+37, and 3C 449, expected to be representative of the class of low- power radio galaxies. Multiple X-ray components are present in each, and the gas components have a wide range of linear sizes and follow an extrapolation of the cluster X-ray luminosity/temperature correlation, implying that there is no relationship between the presence of a radio galaxy and the gas fraction of the environment. No large-scale cooling flows are found. There is no correlation of radio-galaxy size with the scale or density of the X-ray atmosphere. This suggests that processes on scales smaller than those of the overall gaseous environments are the major influence on radio-source dynamics. The intergalactic medium is usually sufficient to confine the outer parts of the radio structures, in some cases even to within 5 kpc of the core. In the case of NGC 315, an extrapolation suggests that the pressure of the atmosphere may match the minimum pressure in the radio source over a factor of ~40 in linear size (a factor of ~1600 in pressure). Subject headings: galaxies: active-radiation mechanisms: nonthermal -radio continuum: galaxies-X-rays: galaxies
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