Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. X: The Tenth Year (2017)
astro-ph.SR
/ Authors
Taichi Kato, Keisuke Isogai, Yasuyuki Wakamatsu, Franz-Josef Hambsch, Hiroshi Itoh, Tamas Tordai, Tonny Vanmunster, Pavol A. Dubovsky, Igor Kudzej, Tomas Medulka
and 60 more authors
Mariko Kimura, Ryuhei Ohnishi, Berto Monard, Elena P. Pavlenko, Kirill A. Antonyuk, Nikolaj V. Pit, Oksana I. Antonyuk, Julia V. Babina, Aleksei V. Baklanov, Aleksei A. Sosnovskij, Roger D. Pickard, Ian Miller, Yutaka Maeda, Enrique de Miguel, Stephen M. Brincat, Domenico Licchelli, Lewis M. Cook, Sergey Yu. Shugarov, Anna M. Zaostrojnykh, Drahomir Chochol, Polina Golysheva, Natalia Katysheva
/ Abstract
Continuing the project described by Kato et al. (2009, PASJ, 61, S395, arXiv/0905.1757), 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 7 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 long-lasting phase of stage A superhumps. We also summarized the recent advances in understanding of SU UMa-type and WZ Sge-type dwarf novae.