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Witnessing the magnetospheric boundary at work in Vela X-1

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dc.contributor.author Doroshenko V.
dc.contributor.author Santangelo A.
dc.contributor.author Suleimanov V.
dc.date.accessioned 2018-09-18T20:01:38Z
dc.date.available 2018-09-18T20:01:38Z
dc.date.issued 2011
dc.identifier.issn 0004-6361
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/135854
dc.description.abstract We present an analysis of the Vela X-1 "off-states" based on Suzaku observations taken in June 2008. Defined as states in which the flux suddenly decreases below the instrumental sensitivity, these "off-states" have been interpreted by several authors as the onset of the "propeller regime". For the first time ever, however, we find that the source does not turn off and, although the flux drops by a factor of 20 during the three recorded "off-states", pulsations are still observed. The spectrum and the pulse profiles of the "off-states" are also presented. We discuss our findings in the framework of the "gated accretion" scenario and conclude that most likely the residual flux is due to the accretion of matter leaking through the magnetosphere by means of Kelvin-Helmholz instabilities (KHI). © 2011 ESO.
dc.relation.ispartofseries Astronomy and Astrophysics
dc.subject Pulsars: individual: Vela X-1
dc.subject X-rays: binaries
dc.title Witnessing the magnetospheric boundary at work in Vela X-1
dc.type Article
dc.relation.ispartofseries-volume 529
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS00046361-2011-529-SID79953273109


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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