NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-11-17 T09:10:05 PST
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For refcode 1995A&A...298..420S:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1995A&A...298..420S Diffuse X-ray emission from Stephan's Quintet J.W. Sulentic, W. Pietsch, and H. Arp Department of Physics and Astronomy, University of Alabama, Tuscaloosa, USA 35487 Max Planck Institut fur extraterrestrische Physik, Giessenbachstrasse, D- 85740 Garching bei Munchen, Germany Max Planck Institut fur Astrophysik, Karl-Schwarzschild-Strasse I, D- 85740 Garching bei Munchen, Germany Received 11 March 1994 / Accepted 12 November 1994 Abstract. We present ROSAT PSPC observations of the compact group Stephan's Quintet (HCG 92). Our 17.8 ksec observation recorded 673 photons from the group. Diffuse emission is detected from a source with diameter D ~ 6.5 arcmin centered on the group. This is strong evidence that at least four of the galaxies are part of a physically dense aggregate. X-ray emission is also seen extending toward the low-redshift member of the group, NGC 7320. The hot diffuse component could arise from gas that has been stripped from the individual galaxies if frequent close encounters occur in this compact group. This interpretation is discussed from the standpoint of the source morphology, luminosity, mass and inferred near solar abundance of the X-ray gas. We also detect a somewhat harder component near the Seyfert nucleus of NGC 7319. Key words: galaxies: active - galaxies: interactions - galaxies: peculiar - galaxies: Seyfert - X-rays: galaxies - galaxies: clusters: Stephan's Quintet
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