2001ApJ...552...42P

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)x10¹⁴ h^–5/2₅₀ M_☉ within an angular radius of θ=74'' (i.e., projected radius of 0.6 Mpc, H₀=50 km.s^–1.Mpc^–1, Ω_m=0.3, Ω_Λ=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, F_RS(2.1 mm)=5.7±1.6 mJy.