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Detection of a second high-velocity component in the highly ionized wind from PG 1211+143

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journal contribution
posted on 18.11.2016, 11:43 by Ken Pounds, Andrew Lobban, J. Reeves, Simon Vaughan
An extended XMM–Newton observation of the luminous narrow line Seyfert galaxy PG1211+143 in 2014 has revealed a more complex highly ionized, high-velocity outflow. The detection of previously unresolved spectral structure in Fe K absorption finds a second outflow velocity component of the highly ionized wind, with an outflow velocity of v ∼ 0.066 ± 0.003c, in addition to a still higher velocity outflow of v ∼ 0.129 ± 0.002c consistent with that first seen in 2001. We note that chaotic accretion, consisting of many prograde and retrograde events, offers an intriguing explanation of the dual velocity wind. In that context the persisting outflow velocities could relate to physically distinct orientations of the inner accretion flow, with prograde accretion yielding a higher launch velocity than retrograde accretion in a ratio close to that observed.

Funding

XMM–Newton is a space science mission developed and operated by the European Space Agency. We acknowledge the excellent work of ESA staff in Madrid in planning and conducting the XMM–Newton observations. The UK Science and Technology Facilities Council funded the post-doctoral research assistantship of AL.

History

Citation

Monthly Notices of the Royal Astronomical Society, 2016, 457 (3), pp. 2951-2957 (7)

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Oxford University Press (OUP), Royal Astronomical Society

issn

0035-8711

eissn

1365-2966

Acceptance date

18/01/2016

Available date

18/11/2016

Publisher version

http://mnras.oxfordjournals.org/content/457/3/2951

Language

en