AGN Feedback in galaxy groups: a detailed study of X-ray features and diffuse radio emission in IC1262

Abstract

This paper reports a systematic search of X-ray cavities, density jumps and shocks in the inter-galactic environment of the galaxy group IC~1262 using {\it Chandra}, GMRT and VLA archival observations. The X-ray imaging analysis reveals a pair of X-ray cavities on the north and south of the X-ray peak, at projected distances of 6.48\,kpc and 6.30\,kpc respectively. Total mechanical power contained in both these cavities is found to be $\sim$12.37$\times 10^{42}$ erg~s${}^{-1}$, and compares well with the X-ray luminosity, within the cooling radius, measured to be $\sim 3.29\times 10^{42}$ erg~s${}^{-1}$, suggesting that the mechanical power injected by the central AGN efficiently balances the radiative loss. We detect a previously unknown X-ray cavity at the position of southern radio lobe in the intra-group medium and find a loop of excess X-ray emission extending $\sim$100 kpc southwest from the central galaxy. The X-ray cavity at the position of southern radio lobe probably represents a first generation X-ray cavity. Two surface brightness edges are evident to the west and east$-$north of the center of this group. The radio galaxy at the core of the IC~1262 group is a rare low-redshift ultra-steep radio galaxy, its spectral index being $\alpha \sim -1.73$ (including the central AGN) and $\alpha \sim -2.08$ (excluding the central AGN). We detect a radio phoenix embedded within the southern radio lobe, for the first time in a poor group, with a spectral index ($\alpha \le -1.92$). The spectral index distribution across the phoenix steepens with increasing distance from its intensity peak.

18 Pages, 12 Figures, Accepted for publication in APJ

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Cited by in corpus (10)

• Feedback from Active Galactic Nuclei in Galaxy Groups
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• LOFAR Observations of X-ray Cavity Systems
• AGN Feedback in Groups and Clusters of Galaxies
• Exploring diffuse radio emission in galaxy clusters and groups with the uGMRT and the SKA
• GMRT unveils steep-spectrum antique filaments in the galaxy cluster Abell 725
• A detailed study of X-ray cavities in the intracluster environment of the cool core cluster Abell 3017
• Cosmological Simulation of Galaxy Groups and Clusters-II: Studying Different Modes of Feedback through X-ray Observations
• Cool-core, X-ray cavities and cold front revealed in RXCJ0352.9+1941 cluster by Chandra and GMRT observations
• Evidence of sloshing-driven mini-halo formation in the cool-core cluster RXCJ1558.3-1410