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The intracluster gas around Cygnus-A

Arnaud, K. A., Fabian, A. C., Eales, Stephen Anthony, Jones, C. and Forman, W. 1984. The intracluster gas around Cygnus-A. Monthly Notices of the Royal Astronomical Society 211 , pp. 981-989.

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Einstein Observatory X-ray observations show that the radio source Cygnus-A lies at the centre of about 1014M_sun; of hot gas. In one direction this gas extends to over 1 Mpc from the radio source, a size comparable with previously observed large X-ray clusters. Gas out to a radius of 125 kpc has a cooling time of less than a Hubble time leading to a cooling flow of about 90 M_sun;yr-1. The hot gas has an r-1 density profile giving an age of less than 2×107yr for a constant power input from the beam. The hotspot advance speed is found to be greater than 0.011 c, using recently published estimates of the pressure in the radio hotspots. Present X-ray observations are not able to detect the shocked gas confining the radio plasma.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Oxford University Press
ISSN: 0035-8711
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Last Modified: 04 Jun 2017 05:12

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