Long-Term Activity of a Little Known Dwarf Nova DT Octantis
Simon V, Edelmann H (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 74
Pages Range: 490-496
Journal Issue: 4
DOI: 10.1134/S199034131904014X
Abstract
We analyze the long-term activity of a little known dwarf nova (DN) DT Oct. We use photographic observations from the Bamberg Observatory (Southern Patrol Photographic Sky Survey), CCD data from ASAS-3 survey, and AAVSO data (both CCD and visual). We determined the recurrence times of the superoutbursts, T-Cso, and of the normal outbursts, T-Cno, to be approximately 311 d and about 30 d, respectively. Although the length of T-Cso evolves gradually and undergoes only small variations (increases and decreases) of the nearby or neighbouring events (on the timescale of a few epochs), the evolution of T-Cso displays considerably larger changes on the longer timescales. They suggest a dominant trend of a decrease of T-Cso on the timescale of tens of years. The possibly magnetized white dwarf does not prevent DT Oct to show the long-term activity of the SUUMa systems. We place the time evolution of the superoutbursts of DT Oct in the context of DNe of various sub-types.
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Czech Republic (CZ)How to cite
APA:
Simon, V., & Edelmann, H. (2019). Long-Term Activity of a Little Known Dwarf Nova DT Octantis. Astrophysical Bulletin, 74(4), 490-496. https://doi.org/10.1134/S199034131904014X
MLA:
Simon, V., and Heinz Edelmann. "Long-Term Activity of a Little Known Dwarf Nova DT Octantis." Astrophysical Bulletin 74.4 (2019): 490-496.
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