Polarimetry and the Long Awaited Superoutburst of BZ UMa

Details Polarimetry and the Long Awaited Superoutburst of BZ UMa Polarimetry and the Long Awaited Superoutburst of BZ UMa

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.1203p&link_type=abstract

American Astronomical Society, AAS Meeting #212, #12.03; Bulletin of the American Astronomical Society, Vol. 40, p.205

Astronomy and Astrophysics

Astronomy

Scientific paper

The dwarf novae BZ UMa has perplexed astronomers for decades. Regular outbursts typical of UGSU dwarf nova have been detected. However, despite good coverage no UGSU type superoutbursts had been detected while peculiar emission lines, intense quiescent flaring and quasiperiodic oscillations during outburst have all been reported. This has led to speculation that it could be an intermediate polar (IP) or a hybrid between an IP and a UGSU star. We report null polarimetry results and also detection of the long awaited superoutburst. We make the case for BZ UMa as an UGSU-type cataclysmic variable star, but some peculiarities remain to be addressed.

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