UV observations of the galaxy cluster Abell 1795 with the optical monitor on XMM-Newton

Details UV observations of the galaxy cluster Abell 1795 with the optical monitor on XMM-Newton UV observations of the galaxy cluster Abell 1795 with the optical monitor on XMM-Newton

2000-11-06

arxiv.org/abs/astro-ph/0011119v2

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures accepted by A&A Letters

Scientific paper

10.1051/0004-6361:20000019

We present the results of an analysis of broad band UV observations of the central regions of Abell 1795 observed with the optical monitor on XMM-Newton. As have been found with other UV observations of the central regions of clusters of galaxies, we find evidence for star formation. However, we also find evidence for absorption in the cD galaxy on a more extended scale than has been seen with optical imaging. We also report the first UV observation of part of the filamentary structure seen in H$\alpha$, X-rays and very deep U band imaging. The part of the filament we see is very blue with UV colours consistent with a very early (O/B) stellar population. This is the first direct evidence of a dominant population of early type stars at the centre of Abell 1795 and implies very recent star formation at the centre of this cluster

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