A New Cataclysmic Variable in Hercules

Astronomy and Astrophysics – Astrophysics

Scientific paper

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20 pages, 7 figures. Data in paper available at http://www.aavso.org/data/download/ Accepted for publication in PASP Dec 2004

Scientific paper

10.1086/427272

We present time-series observations, spectra and archival outburst data of a newly-discovered variable star in Hercules, Var Her 04. Its orbital period, mass ratio, and outburst amplitude resemble those of the UGWZ-type subclass of UGSU dwarf novae. However, its supercycle and outburst light curve defy classification as a clear UGWZ. Var Her 04 is most similar to the small group of possible hydrogen-burning ``period bouncers'', dwarf novae that have passed beyond the period minimum and returned.

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