X-ray observations of SU UMa throughout six outbursts
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 0035-8711Full text not available from this repository.
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2009.16009.x
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|
|Date:||1 March 2010|
|Number of Pages:||8|
|Page Range:||pp. 1816-1823|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||NASA/Goddard Space Flight Centre, STFC Studentship|
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