Two X-ray bright cataclysmic variables with unusual activities: GZ Cnc and NSV 10934
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 2002
- DOI:
- 10.1051/0004-6361:20021435
- arXiv:
- arXiv:astro-ph/0210015
- Bibcode:
- 2002A&A...396..929K
- Keywords:
-
- accretion;
- accretion disks;
- novae;
- cataclysmic variables;
- stars: dwarf novae;
- stars: individual: GZ Cnc;
- NSV 10934;
- Astrophysics
- E-Print:
- 4 pages, 5 figures, accepted for publication in Astron. Astrophys