False-color overlay of the radio and X-ray emission from the inner part of the Virgo Cluster of Galaxies. The X-ray image, obtained by the Einstein (HEAO-2) X-ray satellite, is coded in blue, the radio image, obtained with the VLA, is coded red. While in X-rays, the central giant elliptical galaxy M87 is dominating and some other X-ray bright galactic cores are visible (such as M86), the radio image mainly shows emission of interstellar matter (hydrogen, H I), in particular from the dominating spiral galaxies in the cluster. The X-ray image is a mosaic of many individual observations.
Credit: NRAO/AUI/NSF

More information on this image (NRAO)

References

• V. Cayatte, J.H. van Gorkom, C. Balkowski and C. Kotanyi, 1990. VLA observations of neutral hydrogen in Virgo Cluster galaxies. I - The Atlas. Astronomical Journal, Vol. 100, p. 604-634 (09/1990) [ADS: 1990AJ....100..604C]
• J. van Gorkum and C. Kotanyi, 1985. Neutral hydrogen observations at the VLA. In: ESO Workshop on the Virgo Cluster of Galaxies, Garching, West Germany Proceedings, ESO, p. 61-66 [ADS: 1985vcg..work...61V]

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Hartmut Frommert
Christine Kronberg
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Last Modification: September 12, 2005