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A Sunyaev-Zel'dovich map of the massive core in the luminous X-ray cluster RXJ1347-1145

E. Pointecouteau·M. Giard·A. Benoit·F. X. Désert·N. Aghanim·N. Coron·J. M. Lamarre·J. Delabrouille
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Abstract

We have mapped the Sunyaev-Zel'dovich decrement (hereafter SZ) in the direction of the most luminous X-ray cluster known to date, RXJ1347-1145, at z=0.451. This has been achieved with an angular resolution of about 23'' using the Diabolo photometer running on the IRAM 30 meter radio telescope. We present here a map of the cluster central region at 2.1mm. The Comptonization parameter towards the cluster center, $\yc=(12.7^{+2.9}_{-3.1})\times 10^{-4}$, corresponds to the deepest SZ decrement ever observed. Using the gas density distribution derived from X-ray data, this measurement implies a gas temperature $\te=16.2 \pm 3.8$ keV. The resulting total mass of the cluster is, under hydrostatic equilibrium, $M(r<1 Mpc)=(1.0 \pm 0.3) \times 10^{15} M_\odot$ for a corresponding gas fraction $f_{gas}(r<1 Mpc)=(19.5 \pm 5.8)%$.

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E. Pointecouteau, M. Giard, A. Benoit, F. X. Désert, N. Aghanim, N. Coron, J. M. Lamarre, J. Delabrouille. 1999-05-12. A Sunyaev-Zel'dovich map of the massive core in the luminous X-ray cluster RXJ1347-1145. https://arxiv.org/abs/astro-ph/9905139

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