The X-Ray Fundamental Plane of Clusters of Galaxies

Details The X-Ray Fundamental Plane of Clusters of Galaxies The X-Ray Fundamental Plane of Clusters of Galaxies

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.7405a&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #74.05; Bulletin of the American Astronomical Society, Vol. 26, p.1427

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Scientific paper

The fact that the global scaling parameters of clusters of galaxies are controlled by the virial theorem is perhaps not surprising. Showing such a relation with optical data is difficult. With x-ray data it is straightforward. The x-ray surface brightness profile of 80 clusters of galaxies with known x-ray temperatures were measured using ellipse fitting techniques. There is a two dimensional surface in the cluster temperature, surface brightness, and effective radius three space; a principal component analysis shows that ellipticity, a4/a and other shape parameters are uncorrelated with this plane. The effective radius of the cluster may be predicted using T_x and SB_x with rms residuals of 10%. The relationship found is that expected from the virial theorem and bremsstrahlung.

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