Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.227..241a&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 227, July 1, 1987, p. 241-256. Research supported by th
Astronomy and Astrophysics
Astrophysics
84
Astronomical Photometry, Galactic Clusters, X Ray Astronomy, Abundance, Cooling Flows (Astrophysics), Density Distribution, Exosat Satellite, Iron, Radio Sources (Astronomy), Temperature Distribution
Scientific paper
The authors report observations of the X-ray emission from three bright clusters of galaxies at low Galactic latitudes; the Ophiuchus, PKS 0745-191 and Cygnus-A clusters. Temperatures and iron abundances are determined from EXOSAT spectral data. Images of the Ophiuchus cluster show it to have a high central density and a cooling flow. The authors confirm measurements of a high gas density around PKS 0745-191 and show that the X-ray emission is centred on the radio galaxy. The PKS 0745-191 cluster is the most distant object for which an abundance has been measured from X-ray spectra. The spectrum of Cygnus-A contains a highly absorbed power-law component that the authors identify with the nucleus of the radio source.
Arnaud A. A. K.
Crawford Carolin S.
Fabian Andrea C.
Johnstone R. M.
Mushotzky Richard F.
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