2006/02/15 by Akira Imada, Taichi Kato, L. A. G. Monard +3
Physics and Astronomy · #Accretion disc #Amplitude #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Dwarf nova #Light curve #Photometry (optics) #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1093/pasj/58.2.383
6 pages, 7 figures, accepted for publication in PASJ
arxiv created 2006/02/15 · openalex publication_date 2006/04/25 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract We report on the time-resolved photometry of the 2005 July superoutburst of a dwarf nova, 2QZ J021927.9-304545. The resultant light curves showed conspicuous superhumps with a period of 0.081113(19) days, confirming the SU UMa nature of the object. Although we missed the maximum phase of the outburst, the amplitude of the superoutburst well exceeded 5 mag. This value is slightly larger than that of typical SU UMa-type dwarf novae. The superhump period decreased as the time elapsed, as can be seen in most SU UMa-type dwarf novae. Based on the archive of ASAS-3, the recurrence time of a superoutburst of the variable turned out to be about 400 days. This value is typical of well-known SU UMa stars. The distance to this system was roughly estimated as 370 (+20,-60) pc using an empirical relation.