The SU UMa Nature of the Dwarf Nova, DM Lyrae
Abstract
We carried out time-resolved -band photometry of DM Lyr during long outbursts in 1996 July and in 1996 February-March at Ouda Station, Kyoto University and at Osaka Kyoiku University. Since superhumps were clearly detected in the light curves, DM Lyr was first identified with an SU UMa-type dwarf nova. The superhump period is 0.0673(2) d, and the superhump excess is 2.8(3) %. The duration of the superoutburst, the outburst amplitude, the decline rate in the plateau phase, and the superhump excess were typical values for a usual SU UMa star. According to visual and CCD observations reported to VSNET, this star has experienced a dramatic change of the outburst pattern from a superoutburst phase to a normal outburst phase. There may exist mechanisms to decrease the number of the normal outburst between two successive superoutbursts and to elongate the recurrence cycle of the superoutburst.
Cite
@article{arxiv.astro-ph/0301036,
title = {The SU UMa Nature of the Dwarf Nova, DM Lyrae},
author = {D. Nogami and H. Baba and K. Matsumoto and T. Kato},
journal= {arXiv preprint arXiv:astro-ph/0301036},
year = {2015}
}
Comments
6 pages, 5 figures, accepted for publication in PASJ