Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/222
Title: Is the X-ray spectrum of the narrow emission line QSO PG1211+143 defined by its energetic outflow?
Authors: Pounds, Kenneth A.
Reeves, J.N.
First Published: 2006
Citation: Accepted for publication in Monthly Notices of the Royal Astronomical Society
Abstract: An XMM-Newton observation of the bright QSO PG1211+143 in 2001 revealed a blue-shifted absorption line spectrum indicative of a high velocity radial outflow of highly ionised gas. Unless highly collimated, the outflow mass rate was shown to be comparable to the accretion rate, with mechanical energy a significant fraction of the bolometric luminosity. Analysis of the full XMM-Newton data set now allows the wider effects of that energetic outflow to be explored. We find that absorption and re-emission of the primary continuum flux in the ionised outflow, together with a second, less strongly absorbed, continuum component can explain the strong ‘soft excess’ in PG1211+143 without the extreme velocity ‘smearing’ in conflict with observed absorption line widths. Previously unpublished data from a second XMM-Newton observation of PG1211+143 is shown to be consistent with the new spectral model, finding that the additional continuum component dominates the spectral variability. We speculate that this variable continuum component is powered by the high velocity outflow.
Links: http://hdl.handle.net/2381/222
Version: Preprint
Type: Journal Article
Description: Accepted for publication in Monthly Notices of the Royal Astronomical Society
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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