RT Journal Article
T1 Discovery of Standstills in the SU UMa-Type Dwarf Nova NY Serpentis
A1 Kato, Taichi
A1 Miguel Agustino, Enrique de
A1 Pickard, Roger D.
AB 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).
PB Cornell University
YR 2019
FD 2019-01
LK https://hdl.handle.net/10272/25358
UL https://hdl.handle.net/10272/25358
LA eng
NO Kato, T., Pavlenko, E. P., Pit, N. V., Antonyuk, K. A., Antonyuk, O. I., Babina, J. V., Baklanov, A. V., Sosnovskij, A. A., Belan, S. P., Maeda, Y., Sugiura, Y., Sumiya, S., Matsumoto, H., Ito, D., Nikai, K., Kojiguchi, N., Matsumoto, K., Dubovsky, P. A., Kudzej, I., … Pickard, R. D. (2019). Discovery of Standstills in the SU UMa-Type Dwarf Nova NY Serpentis. arXiv. https://doi.org/10.48550/ARXIV.1901.05100
NO Preprint submitted to Publications of Astronomical Society of Japan (PASJ)
NO We acknowledge with thanks the variable star observationsfrom the AAVSO International Database contributedby observers worldwide and used in this research.We also acknowledge Mayaky observational team(V. V. Troianskyi and V. I. Kashuba) for the short termobservational support. This work was performed withthe use of observational data obtained at North-Caucasusastronomical station of KFU. The work is partially performedaccording to the Russian Government Program ofCompetitive Growth of Kazan Federal University. Thiswork was funded by the subsidy allocated to KazanFederal University for the state assignment in the sphereof scientific activities 3.9780.2017/8.9. The observationsmade by Vihorlat Observatory team were supported bythe Slovak Research and Development Agency under thecontract No. APVV-15-0458. We are grateful to the ASASSNteam for making their data available to the public.
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026