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Astron. Astrophys. 327, 37-46 (1997)

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X-ray analysis of Abell 2634 and its central galaxy 3C 465

Sabine Schindler * 1 and M. Almudena Prieto ** 2

1 Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, D-85748 Garching, Germany
2 Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Straße 1, D-85748 Garching, Germany

Received 23 October 1996 / Accepted 16 June 1997


An analysis of a ROSAT/PSPC observation of the galaxy cluster A 2634 is presented. The cluster has a luminosity of [FORMULA] erg/s in the ROSAT band (0.1-2.4 keV). The temperature profile decreases from about 3 keV in the outer parts to 1.2 keV in the centre. Within a radius of 1.5 Mpc the gas mass of the cluster is 0.51 [FORMULA] and the total mass amounts to [FORMULA]. The X-ray morphology shows two peculiar features - a strongly peaked emission in the centre and an excess emission in the south-west. The central emission probably originates from a weak cooling flow, the SW emission is possibly associated with higher density regions in pressure equilibrium with the intra-cluster medium. This region of excess emission is somewhat embraced by the wide-angle radio tails associated with 3C 465 suggesting that the overpressure of the relativistic particles has displaced the thermal gas.

Key words: galaxies: clusters: individual: A 2634 – galaxies: individual: 3C 465 – intergalactic medium – dark matter – X-rays: galaxies

* e-mail: sas@mpa-garching.mpg.de
** e-mail: alm@mpe-garching.mpg.de

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© European Southern Observatory (ESO) 1997

Online publication: April 8, 1998