Binary Black Holes, Gas Sloshing, and Cold Fronts in the X-ray Halo Hosting 4C+37.11

Abstract

We analyzed deep $Chandra$ ACIS-I exposures of the cluster-scale X-ray halo surrounding the radio source 4C+37.11. This remarkable system hosts the closest resolved pair of super-massive black hole and an exceptionally luminous elliptical galaxy, the likely product of a series of past mergers. We characterize the halo with $r_{500}=0.95$ Mpc, $M_{500}=(2.5\pm 0.2)\times 10^{14}{M}_{\odot }$, $kT=4.6\pm 0.2$ keV, and a gas mass of $M_{\mathrm{g},500}=(2.2\pm 0.1)\times 10^{13}{M}_{\odot }$. The gas mass fraction within $r_{500}$ is $f_{\mathrm{g}}=0.09\pm 0.01$. The entropy profile shows large non-gravitational heating in the central regions. We see several surface brightness jumps, associated with substantial temperature and density changes, but approximate pressure equilibrium, implying that these are sloshing structures driven by a recent merger. A residual intensity image shows core spiral structure closely matching that seen for the Perseus cluster, although at $z=0.055$ the spiral pattern is less distinct. We infer the most recent merger occurred $1-2$ Gyr ago and that the event that brought the two observed super-massive black holes to the system core is even older. Under that interpretation, this black hole binary pair has, unusually, remained at pc-scale separation for more than 2 Gyr.

10 pages, 8 figures, accepted for publication in ApJ

References in corpus (6)

• Shocks and cold fronts in galaxy clusters
• Chandra temperature profiles for a sample of nearby relaxed galaxy clusters
• A Three-Dimensional Map of Milky-Way Dust
• A Compact Supermassive Binary Black Hole System
• The origin of cold fronts in the cores of relaxed galaxy clusters
• A probable Milli-Parsec Supermassive Binary Black Hole in the Nearest Quasar Mrk 231

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