Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Sosnovskij, Aleksei A"'
Autor:
Tampo, Yusuke, Kato, Taichi, Kojiguchi, Naoto, Shugarov, Sergey Yu., Itoh, Hiroshi, Matsumoto, Katsura, Nakagawa, Momoka, Nishida, Yukitaka, Richmond, Michael, Shibata, Masaaki, Ito, Junpei, Kokhirova, Gulchehra, Rakhmatullaeva, Firuza, Tordai, Tamás, Kiyota, Seiichiro, Ruiz, Javier, Dubovsky, Pavol A., Medulka, Tomáš, Pavlenko, Elena P., Antonyuk, Oksana I., Sosnovskij, Aleksei A., Baklanov, Aleksei V., Krushevska, Viktoriia, Vanmunster, Tonny, Brincat, Stephen M., Petrik, Karol, Galdies, Charles, Hambsch, Franz-Josef, Maeda, Yutaka, Nogami, Daisaku
Superoutbursts in WZ Sge-type dwarf novae (DNe) are characterized by both early superhumps and ordinary superhumps originating from the 2:1 and 3:1 resonances, respectively. However, some WZ Sge-type DNe show a superoutburst lacking early superhumps;
Externí odkaz:
http://arxiv.org/abs/2303.17960
Autor:
Kato, Taichi, Kasai, Kiyoshi, Pavlenko, Elena P., Pit, Nikolaj V., Sosnovskij, Aleksei A., Itoh, Hiroshi, Akazawa, Hidehiko, Brincat, Stephen M., Keir, Leonid E., Udovichenko, Sergei N., Tampo, Yusuke, Kojiguchi, Naoto, Shibata, Masaaki, Wakamatsu, Yasuyuki, Tordai, Tamas, Vanmunster, Tonny, Galdies, Charles
We made a time-resolved photometric campaign of the bright cataclysmic variable ASAS J071404+7004.3 in 2020. Inight et al. (2022, arXiv/2109.14514) recently published time-resolved optical spectroscopy, X-ray observations and long- and short-term opt
Externí odkaz:
http://arxiv.org/abs/2202.11832
ASASSN-V J205543.90+240033.5 has been suggested to be a white dwarf pulsar by Kato (2021, arXiv:2108.09060). We obtained time-resolved photometry and identified the orbital and spin periods to be 0.523490(1) d and 0.00678591(1) d = 9.77 min, respecti
Externí odkaz:
http://arxiv.org/abs/2109.03979
Autor:
Niijima, Keito, Kimura, Mariko, Wakamatsu, Yasuyuki, Kato, Taichi, Nogami, Daisaku, Isogai, Keisuke, Kojiguchi, Naoto, Ohnishi, Ryuhei, Shidatsu, Megumi, Stone, Geoffrey, Hambsch, Franz-Josef, Tordai, Tamás, Richmond, Michael, Vanmunster, Tonny, Myers, Gordon, Brincat, Stephen M., Dubovsky, Pavol A., Medulka, Tomas, Kudzej, Igor, Parimucha, Stefan, Littlefield, Colin, Monard, Berto, Ulowetz, Joseph, Pavlenko, Elena P., Antonyuk, Oksana I., Sosnovskij, Aleksei A., Baklanov, Aleksei V., Antoniuk, Kirill A., Pit, Nikolai V., Belan, Sergei P., Babina, Julia V., Sklyanov, Aleksandr S., Zaostrozhnykh, Anna M., Simon, Andrew V., Cook, Lewis M., Miller, Ian, Itoh, Hiroshi, Licchelli, Domenico, Dvorak, Shawn, Sabo, Richard, Ögmen, Yenal, Starkey, Donn R., Nelson, Peter, de Miguel, Enrique, Galdies, Charles, Menzies, Kenneth, Kiyota, Seiichiro, Oksanen, Arto, Pickard, Roger D., Zubareva, Alexandra M., Wenzel, Klaus, Denisenko, Denis
Publikováno v:
Variable Star Bulletin, 74, 2021
How a black hole accretes matter and how this process is regulated are fundamental but unsolved questions in astrophysics. In transient black-hole binaries, a lot of mass stored in an accretion disk is suddenly drained to the central black hole becau
Externí odkaz:
http://arxiv.org/abs/2107.03681
Autor:
Kimura, Mariko, Yamada, Shinya, Nakaniwa, Nozomi, Makita, Yoshihiro, Negoro, Hitoshi, Shidatsu, Megumi, Kato, Taichi, Enoto, Teruaki, Isogai, Keisuke, Mihara, Tatehiro, Akazawa, Hidehiko, Gendreau, Keith C., Hambsch, Franz-Josef, Dubovsky, Pavol A., Kudzej, Igor, Kasai, Kiyoshi, Tordai, Tamás, Pavlenko, Elena, Sosnovskij, Aleksei A., Babina, Julia V., Antonyuk, Oksana I., Itoh, Hiroshi, Maehara, Hiroyuki
SS Cyg has long been recognized as the prototype of a group of dwarf novae that show only outbursts. However, this object has entered a quite anomalous event in 2021, which at first appeared to be standstill, i.e., an almost constant luminosity state
Externí odkaz:
http://arxiv.org/abs/2106.15756
Autor:
Kato, Taichi, Tampo, Yusuke, Kojiguchi, Naoto, Shibata, Masaaki, Ito, Junpei, Isogai, Keisuke, Itoh, Hiroshi, Hambsch, Franz-Josef, Monard, Berto, Kiyota, Seiichiro, Vanmunster, Tonny, Sosnovskij, Aleksei A., Pavlenko, Elena P., Dubovsky, Pavol A., Kudzej, Igor, Medulka, Tomas
IW And stars are a recently recognized subgroup of dwarf novae which are characterized by (often repetitive) slowly rising standstills terminated by brightening, but the exact mechanism for this variation is not yet identified. We have identified BO
Externí odkaz:
http://arxiv.org/abs/2106.15028
Autor:
Tampo, Yusuke, Isogai, Keisuke, Kojiguchi, Naoto, Maehara, Hiroyuki, Taguchi, Kenta, Kato, Taichi, Kimura, Mariko, Wakamatsu, Yasuyuki, Shibata, Masaaki, Nogami, Daisaku, Kawabata, Miho, Maeda, Keiichi, Namekata, Kosuke, Okamoto, Soshi, Otsuka, Masaaki, Umut, Burgaz, Nagoshi, Shumpei, Itoh, Hiroshi, Vanmunster, Tonny, Tordai, Tamas, Stone, Geoffrey, Matsumoto, Katsura, Fujii, Daiti, Matsumura, Ryota, Nakagawa, Momoka, Takeuchi, Nodoka, Zenkou, Yuki, Pavlenko, Elena P., Antonyuk, Kirill A., Pit, Nikolaj V., Antonyuk, Oksana I., Babina, Julia V., Baklanov, Aleksei V., Sosnovskij, Aleksei A., Shugarov, Sergey Yu., Katysheva, Nataly, Chochol, Drahomir, Dvorak, Shawn, Dubovsky, Pavol A., Medulka, Tomas, Kudzej, Igor, Kiyota, Seiichiro, Zubareva, Alexandra M., Belinski, Alexandr A., Ikonnikova, Natalia P., Burlak, Marina A., Sano, Yasuo, Mizutani, Masanori, Ruiz, Javier, pickard, Roger D., Franz-josef, Hambsch, Dufoer, Sjoerd, Brincat, Stephen M., Galdies, Charles, Menzies, Kenneth, Moriyama, Masayuki, Hiraga, Mitsutaka, Maeda, Yutaka, Hirosawa, Kenji, Funada, Masao, Yamamoto, Minoru
We present spectroscopic and photometric observations of 17 dwarf-nova superoutbursts obtained by KOOLS-IFU mounted on the 3.8 m telescope Seimei at Okayama Observatory of Kyoto University and through VSNET collaboration. Our spectroscopic observatio
Externí odkaz:
http://arxiv.org/abs/2104.04948
Autor:
Kimura, Mariko, Isogai, Keisuke, Kato, Taichi, Kojiguchi, Naoto, Wakamatsu, Yasuyuki, Ohnishi, Ryuhei, Sugiura, Yuki, Matsumoto, Hanami, Sumiya, Sho, Ito, Daiki, Nikai, Kengo, Matsumoto, Katsura, Shugarov, Sergey Yu., Kathysheva, Natalia, Itoh, Hiroshi, Dubovsky, Pavol A., Kudzej, Igor, Akitaya, Hiroshi, Oide, Kohei, Kanai, Takahiro, Ishioka, Chihiro, Oasa, Yumiko, Vanmunster, Tonny, Oksanen, Arto, Tordai, Tamás, Murata, Katsuhiro L., Shiraishi, Kazuki, Adachi, Ryo, Oeda, Motoki, Tachibana, Yutaro, Kiyota, Seiichiro, Pavlenko, Elena P., Antonyuk, Kirill, Antonyuk, Oksana, Pit, Nikolai, Sosnovskij, Aleksei, Babina, Julia, Baklanov, Alex, Kawabata, Koji S., Kawabata, Miho, Nakaoka, Tatsuya, Yamanaka, Masayuki, Kasai, Kiyoshi, Miller, Ian, Brincat, Stephen M., Liu, Wei, Sasada, Mahito, Nogami, Daisaku
We report on the multi-wavelength photometry of the 2018 superoutburst in EG Cnc. We have detected stage A superhumps and long-lasting late-stage superhumps via the optical photometry and have constrained the binary mass ratio and its possible range.
Externí odkaz:
http://arxiv.org/abs/2008.11871
Autor:
Kato, Taichi, Isogai, Keisuke, Wakamatsu, Yasuyuki, Hambsch, Franz-Josef, Itoh, Hiroshi, Tordai, Tamas, Vanmunster, Tonny, Dubovsky, Pavol A., Kudzej, Igor, Medulka, Tomas, Kimura, Mariko, Ohnishi, Ryuhei, Monard, Berto, Pavlenko, Elena P., Antonyuk, Kirill A., Pit, Nikolaj V., Antonyuk, Oksana I., Babina, Julia V., Baklanov, Aleksei V., Sosnovskij, Aleksei A., Pickard, Roger D., Miller, Ian, Maeda, Yutaka, de Miguel, Enrique, Brincat, Stephen M., Licchelli, Domenico, Cook, Lewis M., Shugarov, Sergey Yu., Zaostrojnykh, Anna M., Chochol, Drahomir, Golysheva, Polina, Katysheva, Natalia, Zubareva, Alexandra M., Stone, Geoff, Kasai, Kiyoshi, Starr, Peter, Littlefield, Colin, Kiyota, Seiichiro, Andreev, Maksim V., Sergeev, Alexandr V., Ruiz, Javier, Myers, Gordon, Simon, Andrii O., Vasylenko, Volodymyr V., Soldan, Francisco, Ogmen, Yenal, Nakajima, Kazuhiro, Nelson, Peter, Masi, Gianluca, Menzies, Kenneth, Sabo, Richard, Bolt, Greg, Dvorak, Shawn, Stanek, Krzysztof Z., Shields, Joseph V., Kochanek, Christopher S., Holoien, Thomas W. -S., Shappee, Benjamin, Prieto, Jose L., Kojima, Tadashi, Nishimura, Hideo, Kaneko, Shizuo, Fujikawa, Shigehisa, Stubbings, Rod, Muyllaert, Eddy, Poyner, Gary, Moriyama, Masayuki, Maehara, Hiroyuki, Schmeer, Patrick, Denisenko, Denis
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
Externí odkaz:
http://arxiv.org/abs/1911.04645
Autor:
Kato, Taichi, Pavlenko, Elena P., Pit, Nikolaj V., Antonyuk, Kirill A., Antonyuk, Oksana I., Babina, Julia V., Baklanov, Aleksei V., Sosnovskij, Aleksei A., Belan, Sergey P., Maeda, Yutaka, Sugiura, Yuki, Sumiya, Sho, Matsumoto, Hanami, Ito, Daiki, Nikai, Kengo, Kojiguchi, Naoto, Matsumoto, Katsura, Dubovsky, Pavol A., Kudzej, Igor, Medulka, Tomas, Wakamatsu, Yasuyuki, Ohnishi, Ryuhei, Seki, Takaaki, Isogai, Keisuke, Simon, Andrii O., Romanjuk, Yaroslav O., Baransky, Alexsandr R., Sergeev, Aleksandr V., Godunova, Vira G., Izviekova, Inna O., Kozlov, Volodymyr A., Sklyanov, Aleksandr S., Zhuchkov, Roman Ya., Gutaev, Alexei G., Ponomarenko, Vasyl O., Vasylenko, Volodymyr V., Miller, Ian, Kasai, Kiyoshi, Dvorak, Shawn, Menzies, Kenneth, de Miguel, Enrique, Brincat, Stephen M., Pickard, Roger D.
We found that the SU UMa-type dwarf nova NY Ser in the period gap [orbital period 0.097558(6) d] showed standstills twice in 2018. This is the first clear demonstration of a standstill occurring between superoutbursts of an SU UMa-type dwarf nova. Th
Externí odkaz:
http://arxiv.org/abs/1901.05100