IW And is a Z Cam-Type Dwarf Nova
Astrophysics
2007-05-23 v1
Abstract
IW And was discovered as a unique blue variable, which spends 72% of time in "inactive" state, and was only occasionally observed in bright or faint states. Although the past spectroscopy confirmed that the object is a cataclysmic variable (CV), the object has been regarded as significantly different from the known subclasses of CVs. We observed IW And on 55 nights between 2001 December 6 and 2002 March 25. These observations clearly indicate that the object is a Z Cam-type dwarf nova. The duty cycle of standstill in IW And is exceptionally high among Z Cam stars. IW And is apparently the first object to fill the gap between classical Z Cam stars and novalike (NL) stars.
Cite
@article{arxiv.astro-ph/0204353,
title = {IW And is a Z Cam-Type Dwarf Nova},
author = {T. Kato and R. Ishioka and M. Uemura},
journal= {arXiv preprint arXiv:astro-ph/0204353},
year = {2007}
}
Comments
4 pages, 1 figure, submitted to Inf. Bull. Var Stars