Photometric study of new southern SU UMa-type dwarf novae and candidates: V877 Ara, KK Tel and PU CMa
arXiv:astro-ph/0210674 · doi:10.1046/j.1365-8711.2003.06229.x
Abstract
We photometrically observed three dwarf novae V877 Ara, KK Tel and PU CMa. We discovered undisputed presence of superhumps in V877 Ara and KK Tel, with mean periods of 0.08411(2) d and 0.08808(3) d, respectively. Both V877 Ara and KK Tel are confirmed to belong to long-period SU UMa-type dwarf novae. In V877 Ara, we found a large decrease of the superhump period (dot(P)/P = -14.5 +/- 2.1 x 10^(-5)). There is evidence that the period of KK Tel decreased at a similar or a more exceptional rate. Coupled with the past studies of superhump period changes, these findings suggest that a previously neglected diversity of phenomena is present in long-period SU UMa-type dwarf novae. The present discovery of a diversity in long-period SU UMa-type systems would become an additional step toward a full understanding the dwarf nova phenomenon. PU CMa is shown to be an excellent candidate for an SU UMa-type dwarf nova. We examined the outburst properties of these dwarf novae, and derived characteristic outburst recurrence times. Combined with the recently published measurement of the orbital period of PU CMa, we propose that PU CMa is the first object filling the gap between the extreme WZ Sge-type and ER UMa-type stars.
12 pages, 14 figures, accepted for publication in MNRAS
References in corpus (14)
- SPH simulations of tidally unstable accretion disks in cataclysmic variables
- Early humps in WZ Sge stars
- HV Virginis and WZ Sge-Type Dwarf Novae
- Simulations of superhumps and superoutbursts
- The precession of eccentric discs in close binaries
- The Dwarf Novae of Shortest Period
- The nature of dwarf nova outbursts
- On Echo Outbursts and ER UMa Supercycles in SU UMa-type Cataclysmic Variables
- High Speed photometry of faint Cataclysmic Variables: I. V359 Cen, XZ Eri, HY Lup, V351 Pup, V630 Sgr, YY Tel, CQ Vel, CE-315
- Superoutbursts, superhumps and the tidal-thermal instability model
- 1998 Superoutburst of the Large-Amplitude SU UMa-Type Dwarf Nova WX Ceti
- On The Nature Of Superoutbursts In Dwarf Novae
- Superhumps in Cataclysmic Binaries. XXII. 1RXS J232953.9+062814
- Five Dwarf Novae with Orbital Periods Below Two Hours
Cited by in corpus (14)
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae
- Variable Star Network: World Center for Transient Object Astronomy and Variable Stars
- Superhumps and Repetitive Rebrightenings of the WZ Sge-Type Dwarf Nova, EG Cancri
- TV Corvi Revisited: Precursor and Superhump Period Derivative Linked to the Disk Instability Model
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VIII: The Eighth Year (2015-2016)
- Superhumps in the Rarely Outbursting SU UMa-Type Dwarf Nova, HO Delphini
- Late Superhumps in WZ Sge-Type Dwarf Novae
- In-the-Gap SU UMa-Type Dwarf Nova, Var73 Dra with a Supercycle of about 60 Days
- Period change of Superhumps in the WZ Sge-Type Dwarf Nova, HV Virginis
- Photometric study of new southern SU UMa-type dwarf novae - II: Authentication of BF Ara as a Normal SU UMa-type Dwarf Nova with the Shortest Supercycle
- Photometric study of southern SU UMa-type dwarf novae and candidates -- III: NSV 10934, MM Sco, AB Nor, CAL 86
- A New SU UMa-Type Dwarf Nova, QW Serpentis (= TmzV46)
- The 2006 November outburst of EG Aquarii: the SU UMa nature revealed
- Dwarf Novae in the Shortest Orbital Period Regime: I. A New Short Period Dwarf Nova, OT J055717+683226