The X-ray coronae of the two brightest galaxies in the Coma cluster

Abstract

We use deep Chandra X-ray Observatory observations to examine the coronae of the two brightest cluster galaxies in the Coma cluster of galaxies, NGC 4874 and NGC 4889. We find that NGC 4889 hosts a central depression in X-ray surface brightness consistent with a cavity or pair of cavities of radius 0.6 kpc. If the central cavity is associated with an AGN outburst and contains relativistic material, its enthalpy should be around 5x10^55 erg. The implied heating power of this cavity would be around an order of magnitude larger than the energy lost by X-ray emission. It would be the smallest and youngest known cavity in a brightest cluster galaxy and the lack of over pressuring implies heating is still gentle. In contrast, NGC 4874 does not show any evidence for cavities, although it hosts a well-known wide-angle-tail radio source which is visible outside the region occupied by the X-ray corona. These two galaxies show that AGN feedback can behave in varied ways in the same cluster environment.

11 pages, 11 figures, accepted by MNRAS

References in corpus (8)

• Heating Hot Atmospheres with Active Galactic Nuclei
• A deeper X-ray study of the core of the Perseus galaxy cluster: the power of sound waves and the distribution of metals and cosmic rays
• Investigating AGN Heating in a Sample of Nearby Clusters
• Dynamical modelling of luminous and dark matter in 17 Coma early-type galaxies
• X-ray thermal coronae of galaxies in hot clusters -- ubiquity of embedded mini cooling cores
• Direct X-ray Spectral Deprojection of Galaxy Clusters
• Comparing GC and Field LMXBs in Elliptical Galaxies with deep Chandra and Hubble data
• A Deep VLA Radio Continuum Study of the Core and Outskirts of the Coma Cluster

Cited by in corpus (18)

• Ram Pressure Stripping in High-Density Environments
• Inside the Bondi radius of M87
• Baryon Cycles in the Biggest Galaxies
• The X-ray Halo Scaling Relations of Supermassive Black Holes
• Molecular Gas Dominated 50 kpc Ram Pressure Stripped Tail of the Coma Galaxy D100
• Spectacular HST observations of the Coma galaxy D100 and star formation in its ram pressure stripped tail
• The ram pressure stripped radio tails of galaxies in the Coma cluster
• Discovery of a giant radio fossil in the Ophiuchus galaxy cluster
• A universal correlation between warm and hot gas in the stripped tails of cluster galaxies
• A complete view of the outskirts of the Coma cluster
• X-ray Analysis of Filaments in Galaxy Clusters
• A method to search for bulk motions in the ICM with {\sl Chandra} CCD spectra: application to the Bullet cluster
• High-resolution, High-sensitivity, Low-frequency uGMRT View of Coma Cluster of Galaxies
• Investigating the cores of fossil systems with Chandra
• The Evaporation and Survival of Cluster Galaxies' Coronae Part I: The Effectiveness of Isotropic Thermal Conduction Including Saturation
• Cooling rate and turbulence in the intracluster medium of the cool-core cluster Abell 2667
• The X-ray Coronae of two massive galaxies in the core of the Perseus cluster
• The structure of cluster merger shocks: turbulent width and the electron heating timescale