SIMBAD references

2017ApJ...838...16T - Astrophys. J., 838, 16-16 (2017/March-3)

Feeding and feedback in the powerful radio galaxy 3C 120.

TOMBESI F., MUSHOTZKY R.F., REYNOLDS C.S., KALLMAN T., REEVES J.N., BRAITO V., UEDA Y., LEUTENEGGER M.A., WILLIAMS B.J., STAWARZ L. and CAPPI M.

Abstract (from CDS):

We present a spectral analysis of a 200 ks observation of the broad-line radio galaxy 3C 120, performed with the high-energy transmission grating spectrometer on board the Chandra X-ray Observatory. We find (i) a neutral absorption component intrinsic to the source with a column density of logNH=20.67±0.05 cm–2; (ii) no evidence for a warm absorber (WA) with an upper limit on the column density of just logNH 19.7 cm–2, assuming the typical ionization parameter logξ ≃ 2.5 erg s–1 cm; the WA may instead be replaced by (iii) a hot emitting gas with a temperature kT ≃ 0.7 keV observed as soft X-ray emission from ionized Fe L-shell lines, which may originate from a kiloparsec-scale shocked bubble inflated by the active galactic nucleus (AGN) wind or jet with a shock velocity of about 1000 km s–1 determined by the emission line width; (iv) a neutral Fe Kα line and accompanying emission lines indicative of a Compton-thick cold reflector with a low reflection fraction R ≃ 0.2, suggesting a large opening angle of the torus; (v) a highly ionized Fe xxv emission feature indicative of photoionized gas with an ionization parameter logξ=3.75–0.38+0.27 erg s–1 cm and a column density of logNH 22 cm–2 localized within ∼2 pc from the X-ray source; and (vi) possible signatures of a highly ionized disk wind. Together with previous evidence for intense molecular line emission, these results indicate that 3C 120 is likely a late-state merger undergoing strong AGN feedback.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): black hole physics - galaxies: active - line: identification - X-rays: galaxies - X-rays: galaxies

Simbad objects: 8

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