Discovery of a New Dwarf Nova, TSS J022216.4+412259.9: WZ Sge-Type Dwarf Nova Breaking the Shortest Superhump Period Record
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...
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| Published in: | Publications of the Astronomical Society of Japan Vol. 58; no. 4; pp. L23 - L27 |
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| Main Authors: | , , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Oxford, UK
Oxford University Press
25-08-2006
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | 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. |
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| ISSN: | 0004-6264 2053-051X |
| DOI: | 10.1093/pasj/58.4.L23 |