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2000MNRAS.318..733S - Mon. Not. R. Astron. Soc., 318, 733-746 (2000/November-1)
X-ray colour maps of the cores of galaxy clusters.
SANDERS J.S., FABIAN A.C. and ALLEN S.W.
Abstract (from CDS):
We fitted an isothermal plasma model with galactic absorption and constant metallicity to the mid-over-high energy colours in our clusters. Those clusters with known strong cooling flows have inner contours which fit a significantly lower temperature than the outer contours. Clusters in the sample without strong cooling flows show no significant temperature variation. The inclusion of a metallicity gradient alone was not sufficient to explain the observations. A cooling flow component plus a constant temperature phase did account for the colour profiles in clusters with known strong cooling flow components. We also had to increase the levels of absorbing material to fit the low-over-high colours at the cluster centres. Our results provide more evidence that cooling flows accumulate absorbing material. No evidence for increased absorption was found for the non-cooling-flow clusters.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): galaxies: clusters: general - cooling flows - intergalactic medium - X-rays: galaxies
Simbad objects: 35
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