AGN Feedback in galaxy groups: a detailed study of X-ray features and diffuse radio emission in IC1262. (arXiv:1811.05647v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Pandge_M/0/1/0/all/0/1">M. B. Pandge</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sonkamble_S/0/1/0/all/0/1">S. S. Sonkamble</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Parekh_V/0/1/0/all/0/1">Viral Parekh</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dabhade_P/0/1/0/all/0/1">Pratik Dabhade</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Parmar_A/0/1/0/all/0/1">Avni Parmar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Patil_M/0/1/0/all/0/1">M. K. Patil</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Raychaudhury_S/0/1/0/all/0/1">Somak Raychaudhury</a>

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 ($alpha !leq! -1.92$). The spectral
index distribution across the phoenix steepens with increasing distance from
its intensity peak.

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 ($alpha !leq! -1.92$). The spectral
index distribution across the phoenix steepens with increasing distance from
its intensity peak.

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