2006年8月
Discovery of a new dwarf nova, TSS J022216.4+412259.9: WZ Sge-type dwarf nova breaking the shortest superhump period record
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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- 巻
- 58
- 号
- 4
- 開始ページ
- L23
- 終了ページ
- L27
- 記述言語
- 英語
- 掲載種別
- 速報,短報,研究ノート等(学術雑誌)
- DOI
- 10.1093/pasj/58.4.L23
- 出版者・発行元
- OXFORD UNIV PRESS
We report on the time-resolved CCD photometry of a newly discovered variable star, TSS J022216.4+412259.9 during an outburst in a 2005 November-December brightening. The obtained light curves unambiguously show 0.2-0.3 mag modulations, which we confirmed to be the superhump observed among SU UMa-type dwarf novae. We also performed a period search for data obtained during the outburst plateau phase, and revealed the existence of the two periodicities: 0.054868(98) d for the first two nights and 0.055544(26) d for the following plateau phase. This bi-periodicity is hardly observed in the usual SU UMa-type dwarf novae, but is characteristic of WZ Sge-type stars. We undoubtedly detected a rebrightening in the post-outburst stage, which is typical of short-period SU UMa-type dwarf novae, including WZ Sge-type stars. These observations suggest that TSS J022216.4+412259.9 may be a new WZ Sge star breaking the shortest superhump period so far of 0.05648 d for V592 Her among this class with a known superhump period.
- リンク情報
- ID情報
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- DOI : 10.1093/pasj/58.4.L23
- ISSN : 0004-6264
- eISSN : 2053-051X
- Web of Science ID : WOS:000240376000001