A giant radio halo in a low-mass SZ-selected galaxy cluster: ACT-CL J0256.5+0006

Monthly Notices of the Royal Astronomical Society（2016）

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摘要

We present the detection of a giant radio halo (GRH) in the Sunyaev–Zel'dovich (SZ)-selected merging galaxy cluster ACT-CL J0256.5+0006 (z = 0.363), observed with the Giant Metrewave Radio Telescope at 325 and 610 MHz. We find this cluster to host a faint (S610 = 5.6 ± 1.4 mJy) radio halo with an angular extent of 2.6 arcmin, corresponding to 0.8 Mpc at the cluster redshift, qualifying it as a GRH...

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关键词

galaxies: clusters: individual: (ACT-CL J0256.5+0006),galaxies: clusters: intracluster medium,radio continuum: general,X-rays: individual: ACT-CL J0256.5+0006

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