2006PASJ...58L..23I

Query : 2006PASJ...58L..23I

2006PASJ...58L..23I - Publ. Astron. Soc. Jap., 58, L23-L27 (2006/August-0)

Discovery of a new dwarf nova, TSS J022216.4+412259.9: WZ Sge-type dwarf nova breaking the shortest superhump period record.

IMADA A., KUBOTA K., KATO T., NOGAMI D., MAEHARA H., NAKAJIMA K., UEMURA M. and ISHIOKA R.

Abstract (from CDS):

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 0.2-0.3mag 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 0.05648d for V592 Her among this class with a known superhump period.

Abstract Copyright: ∼

Journal keyword(s): accretion, accretion disks - stars: dwarf novae - stars: individual (TSS J022216.4+412259.9) - stars: novae, cataclysmic variables - stars: oscillations

CDS comments: Fig.1 star C not in Simbad.

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* WX Cet CV* 01 17 04.1794193856 -17 56 22.414606224           ~ 173 0
2 TYC 2839-127-1 * 02 21 48.7674320112 +41 21 55.434027060   12.78 12.28 12.6   ~ 1 0
3 V* V572 And CV* 02 22 16.40 +41 22 59.9           ~ 16 0
4 V* SW UMa CV* 08 36 42.7492998204 +53 28 37.976599017           ~ 315 0
5 V* EG Cnc CV* 08 43 03.9863206560 +27 51 49.693595508           DAe 195 0
6 V* RZ Leo CV* 11 37 22.2524330304 +01 48 58.617459936     19.6     DA+dM2 170 0
7 V* AL Com CV* 12 32 25.7951754648 +14 20 42.292188276     16.2     ~ 249 0
8 V* V485 Cen CV* 12 57 23.1807645432 -33 12 05.742562932           ~ 111 0
9 V* V592 Her No* 16 30 56.400 +21 16 58.49           ~ 55 0
10 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20 10.817   D 982 0

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