EXTENDED SZ EMISSION OF THE MOST LUMINOUS X-RAY CLUSTER, RXJ1347-1145
E. POINTECOUTEAU (1), F.X. DESERT (2), M. GIARD (1), A. BENOIT (3), N. AGHANIM (4), J.P. BERNARD (4), J. DELABROUILLE (4)
(1) CESR, 9 av. du colonel Roche BP4346, 31028 Cedex 04, France
(2) LAOG, 414 rue de la piscine, F-38041 Grenoble Cedex 9, France
(3) CRTBT, 25 avenue des Martyrs, BP 166 , F-38042, Grenoble Cedex 9, France
(4) IAS, B\^at 121, Universit\'e Paris-Sud, F-91405 Orsay cedex, France

Abstract:
We have mapped the most luminous X-ray cluster, RXJ1347-1145 at 2.1mm using the DIABOLO spectrophotometer working on the 30m IRAM radiotelescope over a 4 by 4 arcmin field. We have detected the strongest Sunyaev-Zel'dovich (SZ hereafter) decrement known to date and mapped the SZ extended signal of this cluster. The SZ map shows a structure, which is quite different from the X-ray ray map. We have measured a gas mass of $M_{gas}(r<0.6\textrm{~Mpc})=5.3\times 10^{14}~\textrm{M}_\odot$ in 0.6 Mpc assuming an isothermal temperature of 9.3 keV for the gas (value deduced from the X-ray data). Our data argue in favor of a higher gas temperature. We estimate it to 16~keV.We have also recomputed the gas mass, $M_{gas}(r<0.6\textrm{~Mpc})=3.0\times 10^{14}~\textrm{M}_\odot$. This result suggests the gas producing the SZ effect is probably very hot and not virialized.