A high-velocity ionized outflow and XUV photosphere in the narrow emission line quasar PG1211+143 |
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| Authors: | K A Pounds J N Reeves A R King K L Page P T O'Brien M J L Turner |
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| Institution: | Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH;Laboratory for High Energy Astrophysics, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA |
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| Abstract: | We report on the analysis of a ～60-ks XMM–Newton observation of the bright, narrow emission line quasar PG1211+143. Absorption lines are seen in both European Photon Imaging Camera and Reflection Grating Spectrometer spectra corresponding to H- and He-like ions of Fe, S, Mg, Ne, O, N and C. The observed line energies indicate an ionized outflow velocity of ～24 000 km s?1. The highest energy lines require a column density of N H～ 5 × 1023 cm?2 , at an ionization parameter of log ξ～ 3.4 . If the origin of this high-velocity outflow lies in matter being driven from the inner disc, then the flow is likely to be optically thick within a radius of ～130 Schwarzschild radii, providing a natural explanation for the big blue bump (and strong soft X-ray) emission in PG1211+143. |
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| Keywords: | galaxies: active galaxies: general galaxies: individual: PG1211+143 galaxies: Seyfert X-rays: galaxies |
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