Tombesi, F, Reeves, JN, Kallman, T, Reynolds, CS, Mushotzky, RF, Braito, V, Behar, E, Leutenegger, MA and Cappi, M (2016) The Complex Circumnuclear Environment Of The Broad-line Radio Galaxy 3C 390.3 Revealed By Chandra Hetg. Astrophysical Journal, 830 (2). ISSN 0004-637X

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We present the first high spectral resolution X-ray observation of the broad-line radio galaxy 3C 390.3 obtained with the high-energy transmission grating spectrometer on board the Chandra X-ray Observatory. The spectrum shows complex emission and absorption features in both the soft X-rays and Fe K band. We detect emission and absorption lines in the energy range E = 700–1000 eV associated with ionized Fe L transitions (Fe XVII–XX). An emission line at the energy of E sime 6.4 keV consistent with the Fe Kα is also observed. Our best-fit model requires at least three different components: (i) a hot emission component likely associated with the hot interstellar medium in this elliptical galaxy with temperature kT = 0.5 ± 0.1 keV; (ii) a warm absorber with ionization parameter logξ = 2.3 ± 0.5 erg s−1 cm, column density logN H = 20.7 ± 0.1 cm−2, and outflow velocity v out < 150 km s−1; and (iii) a lowly ionized reflection component in the Fe K band likely associated with the optical broad-line region or the outer accretion disk. These evidences suggest the possibility that we are looking directly down the ionization cone of this active galaxy and that the central X-ray source only photoionizes along the unobscured cone. This is overall consistent with the angle-dependent unified picture of active galactic nuclei.

Item Type: Article
Additional Information: © IOP Publishing. The version of record Tombesi, F. et al., 2016. THE COMPLEX CIRCUMNUCLEAR ENVIRONMENT OF THE BROAD-LINE RADIO GALAXY 3C 390.3 REVEALED BY CHANDRA HETG. The Astrophysical Journal, 830(2), p.98 is available from
Uncontrolled Keywords: black hole physics, galaxies, active, line identification, X-rays, galaxies
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 09 Dec 2016 14:45
Last Modified: 09 Dec 2016 15:03

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