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Title:
Chandra Detection of a Parsec Scale Wind in the Broad-Line Radio Galaxy 3C 382
Authors:
Reeves, J. N.; Sambruna, R. M.; Braito, V.; Eracleous, Michael
Affiliation:
AA(Astrophysics Group, School of Physical & Geographical Sciences, Keele University, Keele, Staffordshire ST5 5BG, UK ), AB(NASA/GSFC, Code 662, Greenbelt, MD 20771, USA ), AC(University of Leicester, Department of Physics & Astronomy, University Road, Leicester LE1 7RH, UK ), AD(Department of Astronomy & Astrophysics and Center for Gravitational Wave Physics, The Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USA)
Publication:
The Astrophysical Journal Letters, Volume 702, Issue 2, pp. L187-L190 (2009). (ApJL Homepage)
Publication Date:
09/2009
Origin:
IOP
ApJ Keywords:
galaxies: active, galaxies: individual: 3C 382, X-rays: galaxies
DOI:
10.1088/0004-637X/702/2/L187
Bibliographic Code:
2009ApJ...702L.187R

Abstract

We present unambiguous evidence for a parsec scale wind in the broad-line radio galaxy 3C 382, the first radio-loud active galactic nucleus, with R L = log10(f 5 GHz/f 4400)>1, whereby an outflow has been measured with X-ray grating spectroscopy. A 118 ks Chandra grating (HETG) observation of 3C 382 has revealed the presence of several high ionization absorption lines in the soft X-ray band, from Fe, Ne, Mg, and Si. The absorption lines are blueshifted with respect to the systemic velocity of 3C 382 by -840 ± 60 km s-1 and are resolved by Chandra with a velocity width of σ = 340 ± 70 km s-1. The outflow appears to originate from a single zone of gas of column density N H = 1.3 × 1021 cm-2 and ionization parameter log(ξ/erg cm s-1) = 2.45. From the above measurements we calculate that the outflow is observed on parsec scales, within the likely range from 10to1000 pc, i.e., consistent with an origin in the narrow-line region.
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