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X-ray observations of SU UMa throughout six outbursts
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Collins, David J. and Wheatley, P. J. (2010) X-ray observations of SU UMa throughout six outbursts. Monthly Notices of the Royal Astronomical Society, Vol.402 (No.3). pp. 1816-1823. doi:10.1111/j.1365-2966.2009.16009.x
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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2009.16009.x
Abstract
We present RXTE observations covering six normal outbursts of the dwarf nova SU UMa, the prototype of its class. The outbursts showed consistent X-ray behaviour with the X-ray count rate dropping suddenly by a factor of 4, and with evidence for a half-day delay between the optical rise and the X-ray suppression. In contrast to SS Cygni, an X-ray flux increase at the beginning of outburst was not observed, although it is expected from boundary-layer models. The X-ray flux was high and decreasing during quiescence, in conflict with the disc instability model. The X-ray spectrum of SU UMa was softer in outburst than during quiescence, and it was consistent with constant reflection.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science > Physics | ||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
| Publisher: | Wiley | ||||
| ISSN: | 0035-8711 | ||||
| Official Date: | 1 March 2010 | ||||
| Dates: |
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| Volume: | Vol.402 | ||||
| Number: | No.3 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | pp. 1816-1823 | ||||
| DOI: | 10.1111/j.1365-2966.2009.16009.x | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | NASA/Goddard Space Flight Centre, STFC Studentship |
Data sourced from Thomson Reuters' Web of Knowledge
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