Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. III: The Third Year (2010--2011)
Creators: name: Kato, Taichi
name: Maehara, Hiroyuki
name: Miller, Ian
name: Ohshima, Tomohito
name: de Miguel, Enrique
name: Tanabe, Kenji
name: Imamura, Kazuyoshi
name: Akazawa, Hidehiko
name: Kunitomi, Nanae
name: Takagi, Ryosuke
name: Nose, Mikiha
name: Hambsch, Franz-Josef
name: Kiyota, Seiichiro
name: Pavlenko, Elena P.
name: Baklanov, Aleksei V.
name: Antonyuk, Oksana I.
name: Samsonov, Denis
name: Sosnovskij, Aleksei
name: Antonyuk, Kirill
name: Andreev, Maksim V.
name: Morelle, Etienne
name: Dubovsky, Pavol A.
name: Kudzej, Igor
name: Oksanen, Arto
name: Masi, Gianluca
name: Krajci, Thomas
name: Pickard, Roger D.
name: Sabo, Richard
name: Itoh, Hiroshi
name: Stein, William
name: Dvorak, Shawn
name: Henden, Arne
name: Nakagawa, Shinichi
name: Noguchi, Ryo
name: Iino, Eriko
name: Matsumoto, Katsura
name: Nishitani, Hiroki
name: Aoki, Tomoya
name: Kobayashi, Hiroshi
name: Akasaka, Chihiro
name: Bolt, Greg
name: Shears, Jeremy
name: Ruiz, Javier
name: Shugarov, Sergey Yu.
name: Chochol, Drahomir
name: Parakhin, Nikolai A.
name: Monard, Berto
name: Shiokawa, Kazuhiko
name: Kasai, Kiyoshi
name: Staels, Bart
name: Miyashita, Atsushi
name: Starkey, Donn R.
name: Ogmen, Yenal
name: Littlefield, Colin
name: Katysheva, Natalia
name: Sergey, Ivan M.
name: Denisenko, Denis
name: Tordai, Tamas
name: Fidrich, Robert
name: Goranskij, Vitaly P.
name: Virtanen, Jani
name: Crawford, Tim
name: Pietz, Jochen
name: Koff, Robert A.
name: Boyd, David
name: Brady, Steve
name: James, Nick
name: Goff, William N.
name: Itagaki, Koh-ichi
name: Nishimura, Hideo
name: Nakashima, Youichirou
name: Yoshida, Seiichi
name: Stubbings, Rod
name: Poyner, Gary
name: Maeda, Yutaka
name: Korotkiy, Stanislav A.
name: Sokolovsky, Kirill V.
name: Ueda, Seiji
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Continuing the project described by Kato et al. (2009, PASJ 61, S395, arXiv:0905.1757), we collected times of superhump maxima for 51 SU UMa-type dwarf novae mainly observed during the 2010-2011 season. Although most of the new data for systems with short superhump periods basically confirmed the findings by Kato et al. (2009) and Kato et al. (2010, PASJ 62, 1525, arXiv:1009.5444), the long-period system GX Cas showed an exceptionally large positive period derivative. An analysis of public Kepler data of V344 Lyr and V1504 Cyg yielded less striking stage transitions. In V344 Lyr, there was prominent secondary component growing during the late stage of superoutbursts, and the component persisted at least for two more cycles of successive normal outbursts. We also investigated the superoutbursts of two conspicuous eclipsing objects: HT Cas and the WZ Sge-type object SDSS J080434.20+510349.2. Strong beat phenomena were detected in both objects, and late-stage superhumps in the latter object had an almost constant luminosity during the repeated rebrightenings. The WZ Sge-type object SDSS J133941.11+484727.5 showed a phase reversal around the rapid fading from the superoutburst. The object showed a prominent beat phenomenon even after the end of the superoutburst. A pilot study of superhump amplitudes indicated that the amplitudes of superhumps are strongly correlated with orbital periods, and the dependence on the inclination is weak in systems with inclinations smaller than 80 deg.
description: 87 pages, 92 figures, Accepted for publication in PASJ, correction in the author list and text