تقرير
ASASSN-18fk: A new WZ Sge-type dwarf nova with multiple rebrightenings and a new candidate for a superhumping intermediate polar
| العنوان: | ASASSN-18fk: A new WZ Sge-type dwarf nova with multiple rebrightenings and a new candidate for a superhumping intermediate polar |
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| المؤلفون: | Pavlenko, E., Niijima, K., Mason, P., Wells, N., Sosnovskij, A., Antonyuk, K., Simon, A., Pit, N., Littlefield, C., Itoh, H., Kiyota, S., Tordai, T., Dubovsky, P., Vanmunster, T., Stone, G., Kato, T., Sergeev, A., Godunova, V., Lyumanov, E., Antonyuk, O., Baklanov, A., Babina, Ju., Isogai, K., Romanyuk, Ya., Troianskyi, V., Kashuba, V. |
| المصدر: | Contributions of the Astronomical Observatory Skalnat'e Pleso, vol. 49, no. 2, p. 204-216, 2019 |
| سنة النشر: | 2019 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | We present the result of a multi-longitude campaign on the photometric study of the dwarf nova ASASSN-18fk during its superoutburst in 2018. It was observed with 18 telescopes at 15 sites during ~70 nights within a three-month interval. Observations covered the main outburst, six rebrightenings and 50-d decline to a near-quiescent state. We identify ASASSN-18fk as WZ Sge-type dwarf nova with multiple rebrightenings and show the evolution of the 0.06-d superhump period over all stages of the superoutburst. A strong 22-min brightness modulation that superimposed on superhumps is found during rebrightenings and decline. Some evidence of this modulation in a form of a sideband signal is detected during the very onset of the outburst. We interpret the 22-min modulation as a spin period of the white dwarf and suggest that ASASSN-18fk is a good candidate for a superhumping intermediate polar. Comment: 12 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| الوصول الحر: | http://arxiv.org/abs/1907.00623Test |
| رقم الانضمام: | edsarx.1907.00623 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |