Open AccessA high‐velocity ionized outflow and XUV photosphere in the narrow emission line quasar PG1211+143
Author(s) -
Pounds K. A.,
Reeves J. N.,
King A. R.,
Page K. L.,
O'Brien P. T.,
Turner M. J. L.
Publication year - 2003
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2003.07006.x
Subject(s) - physics , outflow , astrophysics , quasar , emission spectrum , radius , line (geometry) , spectral line , ionization , schwarzschild radius , photosphere , astronomy , ion , accretion (finance) , galaxy , geometry , computer security , mathematics , quantum mechanics , meteorology , computer science
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 × 10 23 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.