T
Takeshi Sakanoi
Researcher at Tohoku University
Publications - 163
Citations - 2918
Takeshi Sakanoi is an academic researcher from Tohoku University. The author has contributed to research in topics: Ionosphere & Magnetosphere. The author has an hindex of 26, co-authored 143 publications receiving 2325 citations. Previous affiliations of Takeshi Sakanoi include Japan Aerospace Exploration Agency & Kumamoto University.
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Journal ArticleDOI
Traveling ionospheric disturbances detected in the FRONT Campaign
A. Saito,M. Nishimura,Mamoru Yamamoto,Shoichiro Fukao,Minoru Kubota,Kazuo Shiokawa,Yuichi Otsuka,T. Tsugawa,Tadahiko Ogawa,Mamoru Ishii,Takeshi Sakanoi,S. Miyazaki +11 more
TL;DR: The F-region Radio and Optical measurement of nighttime TID (FRONT) campaign was conducted to clarify the non-classical features of traveling ionospheric disturbances (TIDs) at mid-latitudes in May, 1998 and August, 1999 as mentioned in this paper.
Journal ArticleDOI
Primary Black Hole Spin in OJ 287 as Determined by the General Relativity Centenary Flare
Mauri Valtonen,Stanisław Zoła,Stanisław Zoła,Stefano Ciprini,Stefano Ciprini,Achamveedu Gopakumar,Katsura Matsumoto,Kozo Sadakane,M. R. Kidger,Kosmas Gazeas,Kari Nilsson,Andrei Berdyugin,Vilppu Piirola,Helen Jermak,Kiran S. Baliyan,F. Alicavus,David Boyd,M. Campas Torrent,F. Campos,J. Carrillo Gómez,Daniel B. Caton,V. H. Chavushyan,J. Dalessio,B. Debski,Dinko Dimitrov,Marek Drozdz,H. Er,Ahmet Erdem,A. Escartin Pérez,V. Fallah Ramazani,Alexei V. Filippenko,Shashikiran Ganesh,F. Garcia,F. Gómez Pinilla,Maheswar Gopinathan,J. B. Haislip,René Hudec,René Hudec,G. Hurst,K. M. Ivarsen,Martin Jelínek,Arti Joshi,Masato Kagitani,Navpreet Kaur,William C. Keel,Aaron P. LaCluyze,Byeong-Cheol Lee,Byeong-Cheol Lee,Elina Lindfors,J. Lozano de Haro,J. P. Moore,Markus Mugrauer,R. Naves Nogues,A. W. Neely,R. H. Nelson,Waldemar Ogloza,S. Okano,Jeewan C. Pandey,M. Perri,M. Perri,Pauli Pihajoki,Gary Poyner,Judith L. Provencal,T. Pursimo,A. Raj,A. Raj,Daniel E. Reichart,R. Reinthal,S. Sadegi,Takeshi Sakanoi,J.-L. Salto González,Sameer,T. Schweyer,T. Schweyer,Michal Siwak,F. C. Soldán Alfaro,Eda Sonbas,Iain A. Steele,John T. Stocke,Jan Strobl,L. O. Takalo,Toma Tomov,L. Tremosa Espasa,J. R. Valdes,J. Valero Pérez,F. Verrecchia,F. Verrecchia,James R. Webb,Mizuki Yoneda,M. Zejmo,WeiKang Zheng,J. H. Telting,J. Saario,T. M. Reynolds,Andreas Kvammen,E. Gafton,R. Karjalainen,Jussi Harmanen,Pere Blay +98 more
TL;DR: In this paper, a quasi-periodic quasar with roughly 12-year optical cycles displays prominent outbursts that are predictable in a binary black hole model, and the model predicted a major optical outburst in 2015 December.
Journal ArticleDOI
AKATSUKI returns to Venus
Masato Nakamura,Takeshi Imamura,Nobuaki Ishii,Takumi Abe,Yasuhiro Kawakatsu,Chikako Hirose,Takehiko Satoh,Makoto Suzuki,Munetaka Ueno,Atsushi Yamazaki,Naomoto Iwagami,Shigeto Watanabe,Makoto Taguchi,Tetsuya Fukuhara,Yukihiro Takahashi,Manabu Yamada,Masataka Imai,Shoko Ohtsuki,Kazunori Uemizu,George Hashimoto,Masahiro Takagi,Yoshihisa Matsuda,Kazunori Ogohara,Naoki Sato,Yasumasa Kasaba,Toru Kouyama,Naru Hirata,Ryosuke Nakamura,Yukio Yamamoto,Takeshi Horinouchi,Masaru Yamamoto,Yoshi-Yuki Hayashi,Hiroki Kashimura,Ko ichiro Sugiyama,Takeshi Sakanoi,Hiroki Ando,Shin-ya Murakami,Takao M. Sato,Seiko Takagi,Kensuke Nakajima,Javier Peralta,Yeon Joo Lee,Junichi Nakatsuka,Tsutomu Ichikawa,Kozaburo Inoue,Tomoaki Toda,Hiroyuki Toyota,Sumitaka Tachikawa,Shinichiro Narita,Tomoko Hayashiyama,Akiko Hasegawa,Yukio Kamata +51 more
TL;DR: The Japanese Venus Climate Orbiter (AKATSUKI) as discussed by the authors was designed to investigate the climate system of Venus and reached the planet on December 7, 2015, where a westward equatorial orbit with apoapsis of ~440,000 km and orbital period of 14 days was initiated.
Journal ArticleDOI
Time of flight analysis of pulsating aurora electrons, considering wave-particle interactions with propagating whistler mode waves
Yoshizumi Miyoshi,Yuto Katoh,Takanori Nishiyama,Takeshi Sakanoi,Kazushi Asamura,Masafumi Hirahara +5 more
TL;DR: In this article, a model for the energy dispersion of electron precipitation associated with pulsating auroras, considering the waveparticle interactions with propagating whistler mode waves from the equator, was proposed.
Journal ArticleDOI
Primary black hole spin in OJ287 as determined by the General Relativity centenary flare
Mauri Valtonen,Staszek Zola,S. Ciprini,Achamveedu Gopakumar,Katsura Matsumoto,Kozo Sadakane,M. R. Kidger,Kosmas Gazeas,Kari Nilsson,Andrei Berdyugin,Vilppu Piirola,Helen Jermak,Kiran S. Baliyan,F. Alicavus,David Boyd,M. Campas Torrent,F. Campos,J. Carrillo Gómez,Daniel B. Caton,V. H. Chavushyan,J. Dalessio,B. Debski,Dinko Dimitrov,Marek Drozdz,H. Er,Ahmet Erdem,A. Escartin Pérez,V. Fallah Ramazani,Alexei V. Filippenko,Shashikiran Ganesh,F. Garcia,F. Gómez Pinilla,Maheswar Gopinathan,J. B. Haislip,René Hudec,G. Hurst,K. M. Ivarsen,Martin Jelínek,Arti Joshi,Masato Kagitani,Navpreet Kaur,William C. Keel,A. P. LaCluyze,Byeong-Cheol Lee,Elina Lindfors,J. Lozano de Haro,J. P. Moore,Markus Mugrauer,R. Naves Nogues,A. W. Neely,R. H. Nelson,Waldemar Ogloza,S. Okano,Jeewan C. Pandey,M. Perri,Pauli Pihajoki,Gary Poyner,Judith L. Provencal,T. Pursimo,A. Raj,Daniel E. Reichart,R. Reinthal,S. Sadegi,Takeshi Sakanoi,J.-L. Salto González,Tassilo Schweyer,Michal Siwak,F. C. Soldán Alfaro,Eda Sonbas,Iain A. Steele,John T. Stocke,Jan Strobl,L. O. Takalo,Toma Tomov,L. Tremosa Espasa,J. R. Valdes,J. Valero Pérez,F. Verrecchia,James R. Webb,Mizuki Yoneda,M. Zejmo,WeiKang Zheng,J. H. Telting,J. Saario,T. M. Reynolds,Andreas Kvammen,E. Gafton,R. Karjalainen,Jussi Harmanen,Pere Blay +89 more
TL;DR: In this article, the authors found that the outburst did occur within the expected time range, peaking on 2015 December 5 at magnitude 12.9 in the optical R-band, based on Swift/XRT satellite measurements and optical polarization data.