2002/07/23 by T. Kato, Takeo Kato, Pavol A. Dubovský +9
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0207484
4 pages, 2 figures, submitted to Inf. Bull. Var. Stars
arxiv created 2002/07/23 · openalex publication_date 2002/07/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
GZ Cnc was discovered as a variable star by Takamizawa (Tmz V34), which turned out to a cataclysmic variable (CV). Past studies have shown that this object is a good candidate for a rarely outbursting, long-period dwarf nova. Only three outbursts were recorded between 1999 and 2001. In 2002 March-May, the object suddenly showed a dramatic increase of the outburst frequency. The shortest observed interval was only 11 d. We suggest that the present behavior may be interpreted as a clustering of short outbursts occasionally seen in intermediate polars (magnetic CVs). The present activity can also be comparable to V426 Oph, another dwarf nova which is known to show occasionally increased activities. The resemblances in the X-ray properties and the outburst behavior suggests that GZ Cnc and V426 Oph may comprise a new class of (weakly magnetic) cataclysmic variables.