A Multiwavelength Study of the Massive Cool Core Cluster MACS J1447.4+0827

Abstract

Clusters of galaxies are outstanding laboratories for understanding the physics of supermassive black hole feedback. Here, we present the first \textit{Chandra}, Karl G. Janksy Very Large Array and \textit{Hubble Space Telescope} analysis of MACS J1447.4+0827 ($z=0.3755$), one of the strongest cool core clusters known, in which extreme feedback from its central supermassive black hole is needed to prevent the hot intracluster gas from cooling. Using this multiwavelength approach, including 70 ks of \textit{Chandra} X-ray observations, we detect the presence of collimated jetted-outflows that coincides with a southern and a northern X-ray cavity. The total mechanical power associated with these outflows ($P_{\mathrm{cav}}\approx 6\times 10^{44}$ erg s${}^{-1}$) is roughly consistent with the energy required to prevent catastrophic cooling of the hot intracluster gas ($L_{\mathrm{cool}}=1.71\pm 0.01\times 10^{45}$ erg s${}^{-1}$ for t${}_{\mathrm{cool}}$ = 7.7 Gyrs); implying that powerful supermassive black hole feedback has been in place several Giga-years ago in MACS J1447.7+0827. In addition, we detect the presence of a radio mini-halo that extends over 300 kpc in diameter ($P_{1.4\mathrm{GHz}}=3.0\pm 0.3\times 10^{24}$ W Hz${}^{-1}$). The X-ray observations also reveal a $\sim 20$ kpc plume-like structure that coincides with optical dusty filaments that surround the central galaxy. Overall, this study demonstrates that the various physical phenomena occurring in the most nearby clusters of galaxies are also occurring in their more distant analogues.

19 pages, 15 figures, 5 tables, resubmitted to ApJ (minor corrections)

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Cited by in corpus (5)

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