Galaxy and hot gas distributions in the z=0.52 galaxy cluster RBS380 from CHANDRA and NTT observations

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dc.creatorGil-Merino, Rodrigo
dc.creatorSchindler, Sabine
dc.date2003-06-24
dc.date.accessioned2026-07-07T10:47:39Z
dc.date.available2026-07-07T10:47:39Z
dc.descriptionWe present CHANDRA X-ray and NTT optical observations of the distant z=0.52 galaxy cluster RBS380 -- the most distant cluster of the ROSAT Bright Source (RBS) catalogue. We find diffuse, non-spherically symmetric X-ray emission with a X-ray luminosity of L_X(0.3-10 keV)=1.6 10^(44) erg/s, which is lower than expected from the RBS. The reason is a bright AGN in the centre of the cluster contributing considerably to the X-ray flux. This AGN could not be resolved with ROSAT. In optical wavelength we identify several galaxies belonging to the cluster. The galaxy density is at least 2 times higher than expected for such a X-ray faint cluster, which is another confirmation of the weak correlation between X-ray luminosity and optical richness. The example of the source confusion in this cluster shows how important high-resolution X-ray imaging is for cosmological research.
dc.description6 pages, 8 figures, 2 tables, A&A in press
dc.identifierhttps://arxiv.org/abs/astro-ph/0306499
dc.identifierhttp://arxiv.org/abs/astro-ph/0306499
dc.identifierAstron.Astrophys.408:51-56,2003
dc.identifierdoi:10.1051/0004-6361:20030963
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183607
dc.subjectAstrophysics
dc.titleGalaxy and hot gas distributions in the z=0.52 galaxy cluster RBS380 from CHANDRA and NTT observations
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