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Astron. Astrophys. 326, 34-44 (1997)

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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. Lémonon 1, M. Pierre 1, R. Hunstead 2, A. Reid 2, Y. Mellier 3, 4 and H. Böhringer 5

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

Received 16 January 1997 / Accepted 11 April 1997

Abstract

We present ROSAT PSPC and HRI observations of the distant cluster A 1300 ([FORMULA]) 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] [FORMULA] at a radius [FORMULA] 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

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© European Southern Observatory (ESO) 1997

Online publication: April 20, 1998
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