Title:	AGN Feedback in Galaxy Groups: A Detailed Study of X-Ray Features and Diffuse Radio Emission in IC 1262
Authors:	Pandge, M.B. Sonkamble, S.S. Parekh, Viral Dabhade, Pratik Parmar, Avni Patil, M K Raychaudhury, Somak
Keywords:	galaxies: active – galaxies general – galaxies groups: individual (IC 1262)
Issue Date:	10-Jan-2019
Publisher:	IOP Sciences for The American Astronomical Society
Citation:	Astrophysical Journal, 2019, Vol. 870, p62
Abstract:	This paper reports a systematic search of X-ray cavities, density jumps, and shocks in the intergalactic environment of the galaxy group IC 1262 using Chandra, GMRT, and Very Large Array archival observations. The X-ray imaging analysis reveals a pair of X-ray cavities to 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 of these cavities is found to be ∼12.37 × 1042 erg s−1, and compares well with the X-ray luminosity, within the cooling radius, measured to be ∼3.29 × 1042 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 the southern radio lobe in the intra-group medium and find a loop of excess X-ray emission extending ∼100 kpc southwest from the central galaxy. The X-ray cavity at the position of the southern radio lobe probably represents a first generation X-ray cavity. Two surface brightness edges are evident to the west and northeast 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 α ∼ −1.73 (including the central AGN) and α ∼ −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 (α ≤ −1.92). The spectral index distribution across the phoenix steepens with increasing distance from its intensity peak.
Description:	Open Access
URI:	http://hdl.handle.net/2289/7152
ISSN:	0004-637X 1538-4357-(Online)
Alternative Location:	https://ui.adsabs.harvard.edu//#abs/2019ApJ...870...62P/abstract https://arxiv.org/abs/1811.05647 https://doi.org/10.3847/1538-4357/aaf105
Copyright:	2019, The American Astronomical Society
Appears in Collections:	Research Papers (A&A)

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.