Galaxy and hot gas distributions in the z=0.52 galaxy cluster RBS380 from CHANDRA and NTT observations
- We 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.
Author details: | Rodrigo Gil-Merino, Sabine Schindler |
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URL: | http://xxx.uni-augsburg.de/pdf/astro-ph/0306499 |
Publication type: | Article |
Language: | English |
Year of first publication: | 2003 |
Publication year: | 2003 |
Release date: | 2017/03/24 |
Source: | Highlights of Spanish astrophysics III : proceedings of the 54th Scientific Meeting of the Spanish Astronomical Society (SEA) / Hrsg.: Jaime Zamorano; Javier Gorgas; Jesus Gallego. - Dodrecht : Kluwer Academic Publ., 2003. - S. 6 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik |