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

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.

9 pages, 8 figures. Accepted for publication in PASJ

References in corpus (2)

• Is evidence for enhanced mass transfer during dwarf-nova outbursts well substantiated?
• Photometric study of new southern SU UMa-type dwarf novae and candidates: V877 Ara, KK Tel and PU CMa

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