M. B. Pandge, G. C. Dewangan, K. P. Singh, M. K. Patil
We present multiwavelength X-ray, optical and radio study of the Fanaroff & Riley class I radio galaxy CTD 86 based on \xmm{}, \rosat{}, Sloan Digital Sky Survey (SDSS), Vainu Bappu Telescope (VBT) observations and the Faint Images of the Radio Sky at Twenty centimeters (FIRST) survey. X-ray emission from CTD 86 originates from two components - diffuse thermal emission from hot gas ($kT\sim 0.9\kev$, $n_e\sim 10^{-3}{\rm cm^{-3}}$, $L_X \sim 5\times10^{42}{\rm ergs s^{-1}}$ and size $\sim 186{\rm kpc}$), and a central point source representing the active nucleus. The hot gaseous environment of CTD 86 is similar to those found in galaxy groups or bright early-type galaxies. We found no clear signature of radio-lobes interacting with the diffuse hot gas. X-ray emission from the active nucleus is well described by an intrinsically absorbed ($N_H \sim 5.9\times10^{22}{\rm cm^{-2}}$) power law ($\Gamma \sim 1.5$) with a $2-10\kev$ luminosity $L_X \sim 2.1\times10^{42}{\rm ergs s^{-1}}$. CTD 86 has a weak optical emission line spectrum typical of type 2 active galactic nuclei (AGN). The nuclear X-ray, H$\alpha$, and radio luminosities of CTD 86 are lower than those of luminous AGN. We have measured the stellar velocity dispersion, $\sigma=182\pm8\kms$, of CTD 86 and estimated the mass of central black hole, $M_{BH}\sim 9\times 10^7{\rm M\odot}$, accreting at a rate of $\dot{m} = L_{bol}/L_{Edd} \sim 4\times10^{-3}$. For more detail see submitted pdf
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http://arxiv.org/abs/1212.6171
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