X-ray emission from the Virgo Cluster and M87
Open Access
- 1 November 1978
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 185 (2) , 423-434
- https://doi.org/10.1093/mnras/185.2.423
Abstract
Extensive observations of the Virgo Cluster by the Ariel V Sky Survey Instrument (SSI) show that the associated X-ray source is much larger than hitherto suspected, and is significantly elongated. The dimensions of the source at half peak power are ∼ 2°.3 × 1°.7 with long axis at position angle ∼ 90°. Various models are fitted to the source profiles at different position angles. The best fit is a model with two components: (a) a large, hard, thermal source of low surface brightness associated with the cluster itself; (b) a bright, soft, enhancement of the cluster emission centred on the giant elliptical galaxy M87.Keywords
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