Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Yoshifusa Ita"'
Autor:
Kengo Tachibana, Takashi Miyata, Takafumi Kamizuka, Ryou Ohsawa, Satoshi Takita, Akiharu Nakagawa, Yoshifusa Ita, Mizuho Uchiyama
Publikováno v:
Publications of the Astronomical Society of Japan.
Asymptotic giant branch (AGB) stars are one of the main sources of dust in the Universe. They form and supply dust triggered by stellar pulsations, but the details of the mechanism are still unknown. Among all AGB stars, dusty AGB stars are the most
Autor:
Yoshifusa Ita, Takashi Ichikawa, Hironori Tsutsui, Takumi Hanaue, Takahiro Komiyama, Hiroki Onozato, Atsushi Iwamatsu, Ryosuke Morita, Yuta Habasaki, Ryuto Amemiya, Miho Hanawa, Kenshi Yanagisawa, Hideyuki Izumiura, Yoshikazu Nakada
A near-infrared telescope with an effective aperture diameter of thirty millimeters has been developed. The primary objective of the development is to observe northern bright stars in the $J$, $H$, and $K_{\rm s}$ bands and provide accurate photometr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e08dfe83e66501b980c10c2c77058c6
Autor:
Yujin E. Nakagawa, Miku Kurimata, Yoshitomo Maeda, Jin Li, Yudai Suwa, Tomoya Kinugawa, Norio Narita, Naoki Ogino, Tatehiro Mihara, Yoichi Yatsu, Kazutaka Yamaoka, Satoshi Sugita, Yuu Niino, Toru Tanimori, Takaaki Tanaka, Teruaki Enoto, Shunsuke Kurosawa, Shigehiro Nagataki, Masaomi Tanaka, Kohji Tsumura, Akihiro Miyasaka, Nobuyuki Kawai, Makoto Yamauchi, Jin Matsumoto, Yoshikatsu Kawata, Keisuke Tamura, Akira Mizuta, Ayumi Yamamoto, T. Sakamoto, Hidehiro Kaneda, Junko S. Hiraga, Hatsune Goto, Kohta Murase, Motoko Serino, Kunihito Ioka, Makoto Arimoto, Hideyuki Izumiura, Masanori Ohno, Akihiko Fukui, Atsumasa Yoshida, Akihiro Doi, Hirotaka Ito, Keitaro Takahashi, Makoto Tashiro, Kenta Kiuchi, Michitoshi Yoshida, Akisato Ohashi, Shuichi Gunji, Kei Sano, Shuji Matsuura, Daito Yuhi, Hirokazu Ikeda, Hiroshi Akitaya, Koji S. Kawabata, Daisuke Yonetoku, Yoshifusa Ita, Hikaru Yamaguchi, Hiroki Nagakura, Yoshikazu Nakada, Takashi Nakamura, Takeru Fujii, Tomonori Totani, Hirofumi Okita, Kensyo Sei, Yusuke Amaya, Tatsuya Sawano, Katsuaki Asano, Kenshi Yanagisawa, Hyeongsoon Wang, Yuji Urata, Ikuyuki Mitsuishi, Tomohiro Yamaguchi, Norita Kawanaka, Jun'ichi Yokoyama, Toshio Murakami, Ryo Yamazaki, Kentaro Motohara, Toru Tamagawa, Takehiko Wada, Susumu Inoue, Shota Kisaka, Kenji Toma, Kohei Inayoshi, Toshio Matsumoto, Takahiro Tanaka, Hirofumi Noda, Hiroshi Tomida
Publikováno v:
Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray.
HiZ-GUNDAM is a future satellite mission which will lead the time-domain astronomy and the multi-messenger astronomy through observations of high-energy transient phenomena. A mission concept of HiZ-GUNDAM was approved by ISAS/JAXA, and it is one of
Autor:
Shiang-Yu Wang, Yasumasa Kasaba, Takashi Miyata, Hiromichi Ebihara, Takurou Tsuchikawa, Takehiko Wada, Daichi Ishikawa, Kumiko Morihana, Takuma Kokusho, Shinki Oyabu, Daisuke Ishihara, Mitsuyoshi Yamagishi, Kosei Matsumoto, Youichi Ohyama, Takao Nakagawa, Toyoaki Suzuki, Satoshi Itoh, Naoki Isobe, Masato Naruse, Mizuho Uchiyama, Shunsuke Onishi, Hiroshi Maeshima, Hideo Matsuhara, Hidehiro Kaneda, Takeshi Sakanoi, Takafumi Kamizuka, Hanae Inami, Takafumi Ootsubo, Ryan Lau, Koji S. Kawabata, Yuki Kuroda, Hiroshi Shibai, Koichi Nagase, Itsuki Sakon, Masayuki Akiyama, Kohji Tsumura, Yoshifusa Ita
Publikováno v:
Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave.
SMI (SPICA Mid-infrared Instrument) is one of the three focal-plane science instruments for SPICA. SMI is the Japanese-led instrument proposed and managed by a university consortium. SMI covers the wavelength range from 10 to 36 μm with four separat
Autor:
K. Yanagisawa, Takashi Miyata, Yoshikazu Nakada, Kentaro Asano, Ryou Ohsawa, Hiroki Onozato, Hiroyuki Mito, Toshiya Ueta, Yoshifusa Ita, Hideyuki Izumiura, Takafumi Kamizuka
Non-variable OH/IR stars are thought to have just left the asymptotic giant branch (AGB) phase. In this conventional picture, they must still show strong circumstellar extinction caused by the dust ejected during the AGB phase, and the extinction is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba2bdc7a6779e4ae4afc22f9798a853a
http://arxiv.org/abs/2008.06897
http://arxiv.org/abs/2008.06897
Autor:
Noriyuki Matsunaga, Yoshifusa Ita, Toshihiko Tanabe, Masaki Takayama, Yoshikazu Nakada, John W. Menzies, Takahiro Nagayama, Michael Feast, Patricia A. Whitelock
The goal of this paper is to characterise the light variation properties of Mira variables in the Small Magellanic Cloud. We have investigated a combined optical and near infrared multi-epoch dataset of Mira variables based on our monitoring data obt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f550cafa47c84b33fb4bcf7455b0d3f3
Autor:
Johan Kero, Noriaki Arima, Hiroyuki Maehara, Masaomi Tanaka, Mikiya Sato, Kohei Morita, Mamoru Doi, Yuki Mori, Koji Nishimura, Toshihiro Kasuga, Ken'ichi Tarusawa, Shinsuke Abe, Takuya Yamashita, Nozomu Tominaga, Tomoki Morokuma, Makoto Ichiki, Shiro Ikeda, Akira Hirota, Takashi Miyata, Mikio Morii, Yuki Sarugaku, Masahiro Konishi, Yasunori Fujiwara, Toshikazu Shigeyama, Daniel Kastinen, Yoshikazu Nakada, Tsutomu Aoki, Takuji Nakamura, Takao Soyano, Kentaro Motohara, Jun-ichi Watanabe, Fumihiko Usui, Naoto Kobayashi, Mitsuru Kokubo, Yoshifusa Ita, Makoto Yoshikawa, Shin-ichiro Okumura, Seitaro Urakawa, Csilla Szasz, Ryou Ohsawa, Hidenori Takahashi, Ko Arimatsu, Shigeyuki Sako
Radar and optical simultaneous observations of meteors are important to understand the size distribution of the interplanetary dust. However, faint meteors detected by high power large aperture radar observations, which are typically as faint as 10 m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5f187e52d9fec840005faa6bb830756
Autor:
Yoshifusa Ita, Masaki Takayama
The origin of long secondary periods (LSPs) in red giant variables is unknown. We investigate whether stellar pulsations in red giants can explain the properties of the LSP variability. VIJHKs light curves obtained by OGLE and the IRSF/SIRIUS survey
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::834f2c5b18ed680b25e580a1829a2301
http://arxiv.org/abs/1912.10244
http://arxiv.org/abs/1912.10244
Red clump (RC) stars are widely used as an excellent standard candle. To make them even better, it is important to know the dependence of their absolute magnitudes on age and metallicity. We observed star clusters in the Large Magellanic Cloud to fil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66cbd3db3d3cd57c3f8dabec420675f6
http://arxiv.org/abs/1904.12874
http://arxiv.org/abs/1904.12874
Autor:
H. Nakaya, Yasushi Nakajima, Daisuke Kato, Patricia A. Whitelock, Yoshifusa Ita, Noriyuki Matsunaga, Takahiro Nagayama, Mikio Kurita, Michael Feast, Yoshikazu Nakada, Toshihiko Tanabe, Tetsuya Nagata, Motohide Tamura, John W. Menzies, Chie Nagashima
Publikováno v:
Monthly Notices of the Royal Astronomical Society.
A very long term near-infrared variable star survey towards the Large and Small Magellanic Clouds was carried out using the 1.4m InfraRed Survey Facility at the South African Astronomical Observatory. This project was initiated in December 2000 in th