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Period change of Superhumps in the WZ Sge-Type Dwarf Nova, HV Virginis

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arxiv astro-ph/0303224 v1 pith:RA5DCM7M submitted 2003-03-11 astro-ph

R. Ishioka , T. Kato , M. Uemura , J. Pietz , T. Vanmunster , T. Krajci , K. Torii , K. Tanabe
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S. Kiyota K. Kinugasa G. Masi K. Morikawa L. M. Cook P. Schmeer H. Yamaoka
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keywords periodsuperhumpssuperoutburstchangeclearlysge-typeagreementcharacteristics
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abstract

After 10 years of quiescence, HV Vir underwent a superoutburst in January 2002. We report time-series observations clearly revealing the period change of ordinary superhumps during the superoutburst. We derived a mean superhump period of 0.058260 d and a positive period derivative of $7 \times 10^{-5}$. These results are in good agreement with the value obtained from the 1992 superoutburst. We also detected early superhumps, which were not clearly recognized in the past outburst, and a possible rebrightening. Both of them are the common characteristics of WZ Sge-type stars.

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