Driving extreme variability: the evolving corona and evidence for jet launching in Markarian 335

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dc.creator Wilkins, D. R.
dc.creator Gallo, Luigi C.
dc.date.accessioned 2017-08-29T18:33:50Z
dc.date.available 2017-08-29T18:33:50Z
dc.date.issued 2015-05-01
dc.identifier.issn 0035-8711
dc.identifier.uri http://library2.smu.ca/handle/01/27061
dc.description Publisher's version/PDF en_CA
dc.description.abstract Variations in the X-ray emission from the narrow-line Seyfert 1 galaxy, Markarian 335, are studied on both long and short time-scales through observations made between 2006 and 2013 with XMM–Newton, Suzaku and NuSTAR. Changes in the geometry and energetics of the corona that give rise to this variability are inferred through measurements of the relativistically blurred reflection seen from the accretion disc. On long time-scales, we find that during the high-flux epochs the corona has expanded, covering the inner regions of the accretion disc out to a radius of 26[superscript +10][subscript -7]r[subscript g]. The corona contracts to within 12r[subscript g] and 5r[subscript g] in the intermediate- and low-flux epochs, respectively. While the earlier high-flux observation made in 2006 is consistent with a corona extending over the inner part of the accretion disc, a later high-flux observation that year revealed that the X-ray source had become collimated into a vertically extended jet-like corona and suggested relativistic motion of material upwards. On short time-scales, we find that an X-ray flare during a low-flux epoch in 2013 corresponded to a reconfiguration from a slightly extended corona to one much more compact, within just 2∼3r[subscript g] of the black hole. There is evidence that during the flare itself, the spectrum softened and the corona became collimated and slightly extended vertically as if a jet-launching event was aborted. Understanding the evolution of the X-ray emitting corona may reveal the underlying mechanism by which the luminous X-ray sources in AGN are powered. en_CA
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dc.description.provenance Made available in DSpace on 2017-08-29T18:33:50Z (GMT). No. of bitstreams: 1 Gallo_Luigi_C_article_2015_f.pdf: 1222268 bytes, checksum: e7681a751f14a1a159f6a57c17c73d9a (MD5) Previous issue date: 2015 en
dc.language.iso en en_CA
dc.publisher Oxford University Press en_CA
dc.relation.uri http://dx.doi.org/doi:10.1093/mnras/stv162
dc.rights This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
dc.subject.lcsh Accretion (Astrophysics)
dc.subject.lcsh X-ray sources, Galactic -- Accretion
dc.subject.lcsh Seyfert galaxies
dc.title Driving extreme variability: the evolving corona and evidence for jet launching in Markarian 335 en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Monthly Notices of the Royal Astronomical Society 449(1), 129-146. (2015) en_CA
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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
 
Published Version: http://dx.doi.org/doi:10.1093/mnras/stv162
 
 

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