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http://hdl.handle.net/20.500.12386/30027
Titolo: | Feeding and Feedback in the Powerful Radio Galaxy 3C 120 | Autori: | Tombesi, Francesco Mushotzky, R. F. Reynolds, C. S. Kallman, T. Reeves, J. N. BRAITO, Valentina Ueda, Y. Leutenegger, M. A. Williams, B. J. Stawarz, Ł. CAPPI, MASSIMO |
Data pubblicazione: | 2017 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 838 | Fascicolo: | 1 | Da pagina:: | 16 | Abstract: | 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 {log}{N}<SUB>{{H</SUB>}}=20.67+/- 0.05 cm<SUP>-2</SUP> (II) no evidence for a warm absorber (WA) with an upper limit on the column density of just {log}{N}<SUB>{{H</SUB>}}< 19.7 cm<SUP>-2</SUP>, assuming the typical ionization parameter logξ ≃ 2.5 erg s<SUP>-1</SUP> 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<SUP>-1</SUP> 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}<SUB>-0.38</SUB><SUP>+0.27</SUP> erg s<SUP>-1</SUP> cm and a column density of {log}{N}<SUB>{{H</SUB>}}> 22 cm<SUP>-2</SUP> 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. | URI: | http://hdl.handle.net/20.500.12386/30027 | URL: | https://iopscience.iop.org/article/10.3847/1538-4357/aa6342 | ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/aa6342 | Bibcode ADS: | 2017ApJ...838...16T | Fulltext: | open |
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