Discovery of a New ER UMa-Type Dwarf Nova IX Draconis

Details Discovery of a New ER UMa-Type Dwarf Nova IX Draconis Discovery of a New ER UMa-Type Dwarf Nova IX Draconis

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasj...53l..51i&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.53, No. 6, pp. L51-L54

Astronomy and Astrophysics

Astronomy

12

Stars: Cataclysmic Variables, Stars: Dwarf Novae, Stars: Individual (Ix Draconis)

Scientific paper

We observed a new dwarf nova, IX Dra, for 46 days between 2000 November 10 and 2001 June 17, and revealed that IX Dra is the fifth member of a peculiar group of SU UMa stars, called ER UMa stars. The light curve is almost perfectly identical to that of V1159 Ori: supercycle, 53 d; interval of normal outbursts, 3--4 d; duty cycle, ~ 30%; and the outburst amplitude, 2.5 mag. From a time-series observation during the superoutbursts, we obtained a presumable superhump period of 0.067 d. We note that some clustering may exist in the period distribution of ER UMa stars. It is needed to confirm this clustering by a larger number of examples.

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