|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012) | | Taichi Kato
; Franz-Josef Hambsch
; Hiroyuki Maehara
; Gianluca Masi
; Ian Miller
; Ryo Noguchi
; Chihiro Akasaka
; Tomoya Aoki
; Hiroshi Kobayashi
; Katsura Matsumoto
; Shinichi Nakagawa
; Takuma Nakazato
; Takashi Nomoto
; Kazuyuki Ogura
; Rikako Ono
; Keisuke Taniuchi
; William Stein
; Arne Henden
; Enrique de Miguel
; Seiichiro Kiyota
; Pavol A. Dubovsky
; Igor Kudzej
; Kazuyoshi Imamura
; Hidehiko Akazawa
; Ryosuke Takagi
; Yuya Wakabayashi
; Minako Ogi
; Kenji Tanabe
; Joseph Ulowetz
; Etienne Morelle
; Roger D. Pickard
; Tomohito Ohshima
; Kiyoshi Kasai
; Elena P. Pavlenko
; Oksana I. Antonyuk
; Aleksei V. Baklanov
; Kirill Antonyuk
; Denis Samsonov
; Nikolaj Pit
; Aleksei Sosnovskij
; Colin Littlefield
; Richard Sabo
; Javier Ruiz
; Thomas Krajci
; Shawn Dvorak
; Arto Oksanen
; Kenji Hirosawa
; William N. Goff
; Berto Monard
; Jeremy Shears
; David Boyd
; Irina B. Voloshina
; Sergey Yu. Shugarov
; Drahomir Chochol
; Atsushi Miyashita
; Jochen Pietz
; Natalia Katysheva
; Hiroshi Itoh
; Greg Bolt
; Maksim V. Andreev
; Nikolai Parakhin
; Viktor Malanushenko
; Fabio Martinelli
; Denis Denisenko
; Chris Stockdale
; Mike Simonsen
; Paul. J. Tristram
; Akihiko Fukui
; Tamas Tordai
; Robert Fidrich
; Kevin B. Paxson
; Koh-ichi Itagaki
; Youichirou Nakashima
; Seiichi Yoshida
; Hideo Nishimura
; Timur V. Kryachko
; Andrey V. Samokhvalov
; Stanislav A. Korotkiy
; Boris L. Satovski
; Rod Stubbings
; Gary Poyner
; Eddy Muyllaert
; Vladimir Gerke
; Walter MacDonald II
; Michael Linnolt
; Yutaka Maeda
; Hubert Hautecler
; | | Date: |
Tue, 2 Oct 2012 07:40:39 GMT (1807kb) | | Abstract: | Continuing the project described by Kato et al. (2009, arXiv:0905.1757), we
collected times of superhump maxima for 86 SU UMa-type dwarf novae mainly
observed during the 2011-2012 season. We confirmed the general trends recorded
in our previous studies. There are some systems showing positive period
derivatives despite the long orbital periods. We observed the 2011 outburst of
the WZ Sge-type dwarf nova BW Scl, and recorded an O-C diagram similar to those
of previously known WZ Sge-type dwarf novae. The WZ Sge-type dwarf nova OT
J184228.1+483742 showed an unusual pattern of double outbursts composed of an
outburst with early superhumps and one with ordinary superhumps. We propose an
interpretation that a very small growth rate of the 3:1 resonance due to an
extremely low mass-ratio led to a quenching of the superoutburst before
ordinary superhumps appeared. We systematically studied ER UMa-type dwarf novae
and found that V1159 Ori showed positive superhumps similar to ER UMa in the
1990s. The recently recognized ER UMa-type object BK Lyn dominantly showed
negative superhumps, and its behavior was very similar to the present-day state
of ER UMa. The pattern of period variations in AM CVn-type objects were very
similar to short-period hydrogen-rich SU UMa-type dwarf novae, making them as
helium analogue of hydrogen-rich SU UMa-type dwarf novae. SBS 1108+574, a
peculiar hydrogen-rich dwarf nova below the period minimum, showed a very
similar pattern of period variations to those of short-period SU UMa-type dwarf
novae. The mass-ratio derived from the detected orbital period suggests that
this system contains a brown-dwarf secondary if the white dwarf has a mass
typical to dwarf novae. CC Scl, MASTER OT J072948.66+593824.4 and OT
J173516.9+154708 showed only low-amplitude superhumps with complex profiles.
(abridged) | | Source: | arXiv, 1210.0678 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER