Survey of period variations of superhumps in SU UMa-type dwarf novae. X: The tenth year (2017)
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Abstract
Continuing the project described by Kato et al. (2009, PASJ, 61, S395), we collected times of superhump maxima for 102 SU UMa-type dwarf novae observed mainly during the 2017 season, and characterized these objects. WZ Sge-type stars identified in this study are PT And, ASASSN-17ei, ASASSN-17el, ASASSN-17es, ASASSN-17fn, ASASSN-17fz, ASASSN-17hw, ASASSN-17kd, ASASSN-17la, PNV J20205397+2508145, and TCP J00332502-3518565. We obtained new mass ratios for seven objects using growing superhumps (stage A). ASASSN-17gf is an EI Psc-type object below the period minimum. CRTS J080941.3+171528 and DDE 51 are objects in the period gap, and both showed a long-lasting phase of stage A superhumps. We also summarize the recent advances in understanding of SU UMa-type and WZ Sge-type dwarf novae.
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Kato, T., Isogai, K., Wakamatsu, Y., Hambsch, F.-J., Itoh, H., Tordai, T., Vanmunster, T., Dubovsky, P. A., Kudzej, I., Medulka, T., Kimura, M., Ohnishi, R., Monard, B., Pavlenko, E. P., Antonyuk, K. A., Pit, N. V., Antonyuk, O. I., Babina, J. V., Baklanov, A. V., … Denisenko, D. (2020). Survey of period variations of superhumps in SU UMa-type dwarf novae. X. The tenth year (2017). In Publications of the Astronomical Society of Japan (Vol. 72, Issue 1). Oxford University Press (OUP). https://doi.org/10.1093/pasj/psz134
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