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arXiv · 1412.4364

HW Bootis: an enigmatic cataclysmic variable star

Jeremy Shears·David Boyd·Graham Darlington·Ian Miller·Roger Pickard·Gary Poyner·Richard Sabo·Mike Simonsen·William Stein
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Abstract

We present the 13-year light curve of HW Boo between 2001 May and 2014 May. We identified 12 outbursts, which typically lasted 2 to 5 days, with an amplitude of 2.7 to 3.6 magnitudes. Time resolved photometry during two outbursts revealed small hump-like structures which increased in size as the outburst progressed, reaching a peak-to-peak amplitude of ~0.8 mag. They occurred on timescales of 15 min to an hour, but did not exhibit a stable period. Similar irregular hump-like variations of 0.1 to 0.8 magnitudes, at intervals of 7 to 30 minutes, were also detected during quiescence. We discuss whether HW Boo might be a dwarf nova of the SU UMa family or an Intermediate Polar, but require further observations to support classification.

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Jeremy Shears, David Boyd, Graham Darlington, Ian Miller, Roger Pickard, Gary Poyner, Richard Sabo, Mike Simonsen, William Stein. 2014-12-14. HW Bootis: an enigmatic cataclysmic variable star. https://arxiv.org/abs/1412.4364

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