NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-20 T14:09:53 PDT
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For refcode 2013MNRAS.435.3385P:
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NED Abstract

Copyright by Royal Astronomical Society. 2013MNRAS.435.3385P A multi-wavelength study of nuclear activity and environment of low-power radio galaxy CTD 86 Pandge, M. B.; Dewangan, G. C.; Singh, K. P.; Patil, M. K. Abstract. We present an X-ray study of the nuclear and extended emission of a nearby Fanaroff & Riley class I (FR-I) radio galaxy CTD 86 based on the XMM-Newton observations. Two different components observed are: diffuse thermal emission from hot gas (kT ~ 0.79 keV, n_e_ ~ 10^-3^ cm^-3^, L_X_ ~ 5 x 10^42^ erg s^- 1^ extended over ~186 kpc), and unresolved nuclear emission exhibiting mild activity. The hot gaseous environment of CTD 86 is similar to that found in groups of galaxies or in bright early-type galaxies. No clear signatures of radio-lobe interaction with the diffuse hot gas are evident in this case. X-ray emission from the nucleus is well constrained by an intrinsically absorbed (N_H_ ~ 5.9 x 10^22^ cm^-2^) power law (Gamma ~ 1.5) with 2-10 keV luminosity L_X_ ~ 2.1 x 10^42^ erg s^-1^. We have measured the stellar velocity dispersion, sigma = 182 +/- 8 km s^-1^, for the CTD 86 and estimated a mass M_BH_ ~ 9 x 10^7^ M_sun_ with L_bol_/L_Edd_ ~ 4 x 10^-3^. The low L_bol_/L_Edd_ rate and high L_X/L_{[O {{III}_}]} ratio suggest that the central engine of CTD 86 consists of a truncated accretion disc lacking a strong ionizing ultraviolet radiation and an inner hot flow producing the X-ray emission. The truncated disc is likely to be inclined with (i ~ 40^degree^-50^degree^) such that our line of sight passes through the outer regions of a putative torus and thus results in high X-ray absorption. We have also identified two bright X-ray sources: SDSS J142452.11+263715.1 and SDSS J142443.78+263616.2, near CTD 86. SDSS J142452.11+263715.1 is a type 1 active galactic nucleus at z = 0.3761 and unabsorbed 0.3-10 keV X-ray luminosity L_X_ ~ 8 x 10^43^ erg s^-1^, while SDSS J142443.78+263616.2 is probably a galaxy with an active nucleus. Key words: galaxies: active, galaxies: elliptical and lenticular, cD, galaxies: individual: CTD 86, galaxies: nuclei, X-rays: galaxies, X-rays: individual: RX J1424.7+2636
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