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Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/201

Title: X-ray absorption and re-emission from an ionized outflow in the Type I quasi-stellar object 2MASS 234449+1221 observed by XMM-Newton
Authors: Pounds, Kenneth A.
Wilkes, B.J.
Page, Kim L.
Issue Date: 2005
Publisher: Blackwell
Citation: Monthly Notices of the Royal Astronomical Society, 2005, 362(3), pp.784-788.
Abstract: We report on the analysis of a short XMM–Newton observation of the reddened Type 1 quasistellar object (QSO) 2MASS 234449+1221 first identified in the Two-Micron All-Sky Survey (2MASS). The underlying X-ray continuum is found to be typical of a broad-line active galaxy, with photon index Γ ∼ 1.9. Low-energy absorption can be modelled by a column NH ∼ 10²² cm−² of moderately ionized gas or a smaller column of cold gas. Addition of a soft X-ray emission component significantly improves the fit in both cases. With the assumption that the soft X-ray flux represents emission from gas photoionized by the incident X-ray continuum, a comparison of the absorbed and emitted luminosities indicates a covering factor of ∼8–17 per cent. The unusual opportunity simultaneously to observe and quantify ionized absorption and emission in 2MASS 234449+1221 is due to the relatively large opacity – for a Type 1 active galactic nucleus (AGN) – of the absorbing gas, which depresses the normally strong continuum below ∼1 keV. A comparison of the soft X-ray emission of 2MASS 234449+1221 with that of other Type 1 and Type 2AGNs suggests the existence of an inner turbulent extension to ionized outflows, not detected in current high-resolution X-ray spectra.
DOI Link: 10.1111/j.1365-2966.2005.09365.x
ISSN: 0035-8711
eISSN: 1365-2966
Links: http://hdl.handle.net/2381/201
http://www.wiley.com/bw/journal.asp?ref=0035-8711
Version: Publisher PDF
Status: Peer-reviewed
Type: Article
Rights: © 2005 Royal Astronomical Society (RAS). Deposited with reference to the publisher's archiving policy available on journal's website.
Description: The definitive version is available at www.blackwell-synergy.com.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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