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The X-ray eclipse of OY Car resolved withXMM-Newton : X-ray emission from the polar regions of the white dwarf
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Wheatley, P. J. and West, Richard G. (2003) The X-ray eclipse of OY Car resolved withXMM-Newton : X-ray emission from the polar regions of the white dwarf. Monthly Notices of the Royal Astronomical Society, Volume 345 (Number 3). pp. 1009-1014. doi:10.1046/j.1365-8711.2003.07030.x ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1046/j.1365-8711.2003.07030.x
Abstract
We present the XMM–Newton X-ray eclipse light curve of the dwarf nova OY Car. The eclipse ingress and egress are well resolved for the first time in any dwarf nova placing strong constraints on the size and the location of the X-ray emitting region. We find good fits to a simple linear eclipse model, giving ingress/egress durations of 30 ± 3 s (Δφorb= 0.0054 ± 0.0005). Remarkably, this is shorter than the ingress/egress duration of the sharp eclipse in the optical, as measured by Wood et al. (1989) and ascribed to the white dwarf (43 ± 2 s). We also find that the X-ray eclipse is narrower than the optical eclipse by 14 ± 2 s, which is precisely the difference required to align the second and third contact points of the X-ray and optical eclipses. We discuss these results and conclude that X-ray emission in OY Car arises most likely from the polar regions of the white dwarf.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
Publisher: | Wiley | ||||
ISSN: | 0035-8711 | ||||
Official Date: | 1 November 2003 | ||||
Dates: |
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Volume: | Volume 345 | ||||
Number: | Number 3 | ||||
Page Range: | pp. 1009-1014 | ||||
DOI: | 10.1046/j.1365-8711.2003.07030.x | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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