NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-25 T12:54:45 PDT
Help | Comment | NED Home

For refcode 2009MNRAS.399..601B:
Retrieve 9 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 2009MNRAS.399..601B A diffuse bubble-like radio-halo source MRC0116+111: imprint of AGN feedback in a low-mass cluster of galaxies Bagchi, Joydeep; Jacob, Joe; Gopal-Krishna; Werner, Norbert; Wadnerkar, Nitin; Belapure, Jaydeep; Kumbharkhane, A. C. Abstract. We present detailed observations of MRC0116+111, revealing a luminous, miniradio halo of ~240-kpc diameter located at the centre of a cluster of galaxies at redshift z = 0.131. Our optical and multiwavelength Giant Metrewave Radio Telescope and Very Large Array radio observations reveal a highly unusual radio source: showing a pair of giant (~100-kpc diameter) bubble-like diffuse structures, that are about three times larger than the analogous extended radio emission observed in M87 - the dominant central radio galaxy in the Virgo cluster. However, in MRC0116+111 we do not detect any ongoing active galactic nucleus (AGN) activity, such as a compact core or active radio jets feeding the plasma bubbles. The radio emitting relativistic particles and magnetic fields were probably seeded in the past by a pair of radio jets originating in the AGN of the central cD galaxy. The extremely steep high-frequency radio spectrum of the north-western bubble, located ~100kpc from cluster centre, indicates radiation losses, possibly because having detached, it is rising buoyantly and moving away into the putative hot intracluster medium. The other bubble, closer to the cluster centre, shows signs of ongoing particle re-acceleration. We estimate that the radio jets which inflated these two bubbles might have also fed enough energy into the intracluster medium to create an enormous system of cavities and shock fronts, and to drive a massive outflow from the AGN, which could counter-balance and even quench a cooling flow. Therefore, this source presents an excellent opportunity to understand the energetics and the dynamical evolution of radio jet inflated plasma bubbles in the hot cluster atmosphere. Key words: acceleration of particles, magnetic fields, galaxies: active, galaxies: clusters: individual: MRC0116+111, radio continuum: general, X-rays: galaxies: clusters
Retrieve 9 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home