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X-ray observations of SU UMa throughout six outbursts
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Collins, David J. and Wheatley, Peter 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. ISSN 0035-8711
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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-Blackwell Publishing, Inc |
| ISSN: | 0035-8711 |
| Date: | 1 March 2010 |
| Volume: | Vol.402 |
| Number: | No.3 |
| Number of Pages: | 8 |
| Page Range: | pp. 1816-1823 |
| Identification Number: | 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 |
| URI: | http://wrap.warwick.ac.uk/id/eprint/6412 |
Data sourced from Thomson Reuters' Web of Knowledge
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