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Title: An extended XMM-Newton observation of the Seyfert galaxy NGC 4051 II. Soft X-ray emission from a limb-brightened shell of post-shock gas
Authors: Pounds, Kenneth Alwyne
Vaughan, Simon
First Published: 11-Aug-2011
Publisher: Wiley-Blackwell
Citation: Monthly Notices of the Royal Astronomical Society, 2011, 415, pp. 2379-2389 (11)
Abstract: An extended XMM–Newton observation of the Seyfert 1 galaxy NGC 4051 in 2009 revealed a complex absorption spectrum, with a wide range of outflow velocities and ionization states. The main velocity and ionization structure was interpreted in Paper I in terms of a decelerating, recombining flow resulting from the shocking of a still higher velocity wind colliding with the interstellar medium or slower moving ejecta. The high sensitivity of the XMM–Newton observation also revealed a number of broad emission lines, all showing evidence of self-absorption near the line cores. The line profiles are found here to be consistent with emission from a limb-brightened shell of post-shock gas building up ahead of the contact discontinuity. While the broad emission lines remain quasi-constant as the continuum flux changes by an order of magnitude, recombination continua of several H- and He-like ions are found to vary in response to the continuum, providing an important key to scaling the ionized flow.
DOI Link: 10.1111/j.1365-2966.2011.18866.x
ISSN: 0035-8711
eISSN: 1365-2966
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS. This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2011 The Authors. Published by Royal Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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