We present a high-resolution (22'' FWHM) extended map at 2.1 mm of the Sunyaev-Zeldovich effect toward the most luminous X-ray cluster, RX J1347-1145. These observations have been performed with the Diabolo photometer working at the focus of the 30 m IRAM radiotelescope. We have derived a projected gas mass of (1.1 ± 0.1) × 1014 h M☉ within an angular radius of θ = 74'' (i.e., projected radius of 0.6 Mpc, H0 = 50 km s-1 Mpc-1, Ωm = 0.3, ΩΛ = 0.7). This result matches very well the expected gas mass from the cluster models of X-ray data. With an unprecedented sensitivity level, our measurement does not show significant departure from a spherical distribution. The data analysis also allows us to characterize the 2.1 mm flux of a well-known radio source lying in the center of the cluster, FRS(2.1 mm) = 5.7 ± 1.6 mJy.
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机译：我们在2.1毫米的Sunyaev-Zeldovich效应下向最发光的X射线群RX J1347-1145提供了高分辨率（22''FWHM）扩展图。这些观察是通过Diabolo光度计在30 m IRAM射电望远镜的焦点下进行的。我们得出了在θ= 74''的角半径内的（1.1±0.1）×1014 hM☉的投影气体质量（即，投影半径为0.6 Mpc，H0 = 50 km s-1 Mpc-1，Ωm= 0.3，Ω= 0.7）。该结果与X射线数据的聚类模型中的预期气体质量非常匹配。在前所未有的灵敏度水平下，我们的测量结果并未显示出明显偏离球形分布的情况。数据分析还使我们能够表征位于群集中心的著名无线电源的2.1 mm通量，FRS（2.1 mm）= 5.7±1.6 mJy。
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