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Astron. Astrophys. 326, 34-44

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X-ray/optical analysis of the cluster of galaxies Abell 1300: indications of a post-merger at z = 0.31

L. Lémonon1, M. Pierre1, R. Hunstead2, A. Reid2, Y. Mellier3,4, and H. Böhringer5

1CEA Saclay DSM/DAPNIA/SAp, Service d'Astrophysique, F-91191 Gif-sur-Yvette, France
2School of Physics, The University of Sydney, NSW 2006, Australia
3Institut d'Astrophysique de Paris, 98bis Boulevard Arago, F-75014 Paris, France
4Observatoire de Paris, DEMIRM, 61 avenue de l'Observatoire, F-75014 Paris, France
5Max-Planck-Institut für Extraterrestrische Physik, D-85740 Garching, Germany

Received 16 January 1997 / Accepted 11 April 1997


We present ROSAT PSPC and HRI observations of the distant cluster A 1300 (z = 0.3071) in conjunction with optical data, to investigate the physics of the intra-cluster medium and the dynamical state of the cluster. By means of a multi-resolution wavelet analysis, we find evidence for structures in the X-ray emission of this very luminous ( FORMULA erg s-1 in the 0.1-2.4 keV band) and massive ( FORMULA M FORMULA at a radius ~ 2.2 Mpc) cluster. This cluster is significant as we appear to be witnessing the end of a merger which occurred at an early epoch.

Key words: galaxies: clusters: general - galaxies: clusters: individual: Abell 1300 - cosmology: observations - dark matter - X-rays: galaxies

Send offprint requests to: L. Lémonon llemonon@cea.fr

© European Southern Observatory (ESO) 1997

Online publication: September 9, 1997
Last change: April 20, 1998