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Evidence of a high-velocity ionized outflow in a second narrow-line quasar PG 0844+349

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journal contribution
posted on 03.11.2006, 13:43 by Kenneth A. Pounds, Andrew R. King, Kim L. Page, Paul T. O'Brien
Following the discovery of X-ray absorption in a high-velocity outflow from the bright quasar PG 1211 + 143 we have searched for similar features in XMM–Newton archival data of a second (high accretion rate) quasar PG 0844+349. Evidence is found for several faint absorption lines in both the EPIC and RGS spectra, whose most likely identification with resonance transitions in H-like Fe, S and Ne implies an origin in highly ionized matter with an outflow velocity of order ~0.2c. The line equivalent widths require a line-of-sight column density of NH ~4 × 10²³ cm², at an ionization parameter of log ξ ~3.7. Assuming a radial outflow being driven by radiation pressure from the inner accretion disc, as suggested previously for PG 1211 + 143, the flow in PG 0844+349 is also likely to be optically thick, in this case within ~25 Schwarzschild radii. Our analysis suggests that a high-velocity, highly ionized outflow is likely to be a significant component in the mass and energy budgets of active galactic nuclei accreting at or above the Eddington rate.

History

Citation

Monthly Notices of the Royal Astronomical Society, 2003, 346, pp.1025-1030.

Version

VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Blackwell

issn

0035-8711

eissn

1365-2966

Copyright date

2003

Available date

03/11/2006

Publisher version

http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966

Notes

The definitive version is available at www.blackwell-synergy.com

Language

en