NASA NTRS · 19850030121
X-ray emission from Stephan's Quintet and other compact groups
Abstract
A search for X-ray emission from five compact groups of galaxies with the Einstein Observatory revealed detections from three groups. Soft, extended X-ray emission was observed in Stephan's Quintet, which is most likely caused by hot intracluster gas. This provides evidence for dynamical interaction among the group galaxies. X-ray emission from the group Arp 330 may also originate in hot intracluster gas. Stephan's Quintet and Arp 330 have the largest velocity dispersions among the groups studied, suggesting a correlation between high velocity and the release (or properties) of hot gas. X-ray emission from Arp 318 may originate in its member galaxies.
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Bahcall, N. A., Harris, D. E., Rood, H. J.. 1984-09-15. X-ray emission from Stephan's Quintet and other compact groups. https://ntrs.nasa.gov/citations/19850030121
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