Discovery of Standstills in the SU UMa-Type Dwarf Nova NY Serpentis
arXiv:1901.05100 · doi:10.1093/pasj/psz007
Abstract
We found that the SU UMa-type dwarf nova NY Ser in the period gap [orbital period 0.097558(6) d] showed standstills twice in 2018. This is the first clear demonstration of a standstill occurring between superoutbursts of an SU UMa-type dwarf nova. There was no sign of superhumps during the standstill, and at least one superoutburst directly started from the standstill. This provides strong evidence that the 3:1 resonance was excited during standstills. This phenomenon indicates that the disk radius can grow during standstills. We also interpret that the condition close to the limit of the tidal instability caused early quenching of superoutbursts, which resulted substantial amount of matter left in the disk after the superoutburst. We interpret that the substantial matter in the disk in condition close to the limit of the tidal instability is responsible for standstills (as in the high mass-transfer system NY Ser) or multiple rebrightenings (as in the low mass-transfer system V1006 Cyg).
arXiv comment6 pages, 2 figures, Supporting information in si.pdf, accepted for publication in PASJ (Letters)
References in corpus (15)
- The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
- The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae
- Variable Star Network: World Center for Transient Object Astronomy and Variable Stars
- New Method to Estimate Binary Mass Ratios by Using Superhumps
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012)
- BK Lyncis: The Oldest Old Nova?... And a Bellwether for Cataclysmic-Variable Evolution
- The Cause of the Superoutburst in SU UMa Stars is Finally Revealed by Kepler Light Curve of V1504 Cygni
- Study of Superoutbursts and Superhumps in SU UMa Stars by the Kepler Light Curves of V344 Lyrae and V1504 Cygni
- On Echo Outbursts and ER UMa Supercycles in SU UMa-type Cataclysmic Variables
- Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. V: The Fifth Year (2012-2013)
- Three Z Cam-Type Dwarf Novae Exhibiting IW And-Type Phenomenon
- V1006 Cygni: Dwarf Nova Showing Three Types of Outbursts and Simulating Some Features of the WZ Sge-Type Behavior
- NY Serpentis: SU UMa-Type Nova in the Period Gap with Diversity of Normal Outbursts
- Superoutburst of WZ Sge-type Dwarf Nova Below the Period Minimum: ASASSN-15po
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- BO Ceti: Dwarf Nova Showing Both IW And and SU UMa-Type Features
- ASASSN-18aan: An Eclipsing SU UMa-type Cataclysmic Variable with a 3.6-hour Orbital Period and a Late G-type Secondary Star
- A systematic study of spiral density waves in the accretion discs of Cataclysmic Variables
- Superoutbursts and Positive Superhumps Occurred During the Standstill of a Z Cam-type Dwarf Nova
- CS Indi: SU UMa-Type Dwarf Nova with Long Precursor Outburst