Volume 396, Number 3, December IV 2002
|Page(s)||929 - 932|
|Section||Interstellar and circumstellar matter|
|Published online||05 December 2002|
Two X-ray bright cataclysmic variables with unusual activities: GZ Cnc and NSV 10934
Department of Astronomy, Kyoto University, Kyoto 606-8502, Japan
2 MEDUZA group, Vedecko-kulturne centrum na Orave, 027 42 Podbiel 194, Slovakia
3 19 Greenland Drive, Drouin 3818, Victoria, Australia
4 46394 Roanne Drive Macomb, MI 48044, USA
5 Faculty of Science, Kyushu University, Fukuoka 810-8560, Japan
6 RMB 2493, Ellinbank 3820, Australia
7 Bronberg Observatory, PO Box 11426, Tiegerpoort 0056, South Africa
8 32 Monash Ave, Nedlands, WA 6009, Australia
9 PO Box 157, NSW 2340, Australia
Corresponding author: T. Kato, firstname.lastname@example.org
Accepted: 1 October 2002
We report on a discovery of unexpected activities in two X-ray bright dwarf novae. GZ Cnc showed an anomalous clustering of outbursts in 2002, in contrast to a low outburst frequency in the past record. The activity resembles an increased activity seen in some intermediate polars or candidates. We identified NSV 10934, X-ray selected high-amplitude variable star, as a dwarf nova with unusually rapid decline. The outburst characteristics make NSV 10934 a twin of recently discovered intermediate polar (HT Cam) with dwarf nova-type outbursts. We propose that these activities in X-ray strong dwarf novae may be a previously overlooked manifestation of outburst activities in magnetic cataclysmic variables.
Key words: accretion, accretion disks / novae, cataclysmic variables / stars: dwarf novae / stars: individual: GZ Cnc, NSV 10934
© ESO, 2002
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