Zobrazeno 1 - 10
of 147
pro vyhledávání: '"NAKADA,Yoshikazu"'
Autor:
Ita, Yoshifusa, Ichikawa, Takashi, Tsutsui, Hironori, Hanaue, Takumi, Komiyama, Takahiro, Onozato, Hiroki, Iwamatsu, Atsushi, Morita, Ryosuke, Habasaki, Yuta, Amemiya, Ryuto, Hanawa, Miho, Yanagisawa, Kenshi, Izumiura, Hideyuki, Nakada, Yoshikazu
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:
http://arxiv.org/abs/2202.09962
Autor:
Matsunaga, Noriyuki, Itane, Akinori, Hattori, Kohei, Crestani, Juliana, Braga, Vittorio, Bono, Giuseppe, Taniguchi, Daisuke, Baba, Junichi, Maehara, Hiroyuki, Ukita, Nobuharu, Sakamoto, Tsuyoshi, Kobayashi, Naoto, Aoki, Tsutomu, Soyano, Takao, Tarusawa, Ken'ichi, Sarugaku, Yuki, Mito, Hiroyuki, Sako, Shigeyuki, Doi, Mamoru, Nakada, Yoshikazu, Izumi, Natsuko, Ita, Yoshifusa, Onozato, Hiroki, Jian, Mingjie, Kondo, Sohei, Hamano, Satoshi, Yasui, Chikako, Tsujimoto, Takuji, Otsubo, Shogo, Ikeda, Yuji, Kawakita, Hideyo
Metal-deficient stars are important tracers for understanding the early formation of the Galaxy. Recent large-scale surveys with both photometric and spectroscopic data have reported an increasing number of metal-deficient stars whose kinematic featu
Externí odkaz:
http://arxiv.org/abs/2201.05402
Autor:
Ita, Yoshifusa, Menzies, John W., Whitelock, Patricia A., Matsunaga, Noriyuki, Takayama, Masaki, Nakada, Yoshikazu, Tanabe, Toshihiko, Feast, Michael W., Nagayama, Takahiro
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:
http://arxiv.org/abs/2010.08171
Autor:
Ohsawa, Ryou, Hirota, Akira, Morita, Kohei, Abe, Shinsuke, Kastinen, Daniel, Kero, Johan, Szasz, Csilla, Fujiwara, Yasunori, Nakamura, Takuji, Nishimura, Koji, Sako, Shigeyuki, Watanabe, Jun-ichi, Aoki, Tsutomu, Arima, Noriaki, Arimatsu, Ko, Doi, Mamoru, Ichiki, Makoto, Ikeda, Shiro, Ita, Yoshifusa, Kasuga, Toshihiro, Kobayashi, Naoto, Kokubo, Mitsuru, Konishi, Masahiro, Maehara, Hiroyuki, Miyata, Takashi, Mori, Yuki, Morii, Mikio, Morokuma, Tomoki, Motohara, Kentaro, Nakada, Yoshikazu, Okumura, Shin-ichiro, Sarugaku, Yuki, Sato, Mikiya, Shigeyama, Toshikazu, Soyano, Takao, Takahashi, Hidenori, Tanaka, Masaomi, Tarusawa, Ken'ichi, Tominaga, Nozomu, Urakawa, Seitaro, Usui, Fumihiko, Yamashita, Takuya, Yoshikawa, Makoto
Publikováno v:
Planetary and Space Science 194 (2020) 10511
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:
http://arxiv.org/abs/2008.08942
Autor:
Kamizuka, Takafumi, Nakada, Yoshikazu, Yanagisawa, Kenshi, Ohsawa, Ryou, Ita, Yoshifusa, Izumiura, Hideyuki, Mito, Hiroyuki, Onozato, Hiroki, Asano, Kentaro, Ueta, Toshiya, Miyata, Takashi
Publikováno v:
The Astrophysical Journal, Volume 897, Issue 1, id.42, 20 pp. (2020)
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:
http://arxiv.org/abs/2008.06897
Autor:
Richmond, Michael W., Tanaka, Masaomi, Morokuma, Tomoki, Sako, Shigeyuki, Ohsawa, Ryou, Arima, Noriaki, Tominaga, Nozomu, Doi, Mamoru, Aoki, Tsutomu, Arimatsu, Ko, Ichiki, Makoto, Ikeda, Shiro, Ita, Yoshifusa, Kasuga, Toshihiro, Kawabata, Koji S., Kawakita, Hideyo, Kobayashi, Naoto, Kokubo, Mitsuru, Konishi, Masahiro, Maehara, Hiroyuki, Mito, Hiroyuki, Miyata, Takashi, Mori, Yuki, Morii, Mikio, Motohara, Kentaro, Nakada, Yoshikazu, Shin-Ich, Onozato, Hiroki, Sarugaku, Yuki, Sato, Mikiya, Shigeyama, Toshikazu, Soyano, Takao, Takahashi, Hidenori, Tanikawa, Ataru, Tarusawa, Ken'ichi, Urakawa, Seitaro, Usui, Fumihiko, Watanabe, Junichi, Yamashita, Takuya, Yoshikawa, Makoto
Using a prototype of the Tomo-e Gozen wide-field CMOS mosaic camera, we acquire wide-field optical images at a cadence of 2 Hz and search them for transient sources of duration 1.5 to 11.5 seconds. Over the course of eight nights, our survey encompas
Externí odkaz:
http://arxiv.org/abs/1910.11343
Autor:
Arimatsu, Ko, Ohsawa, Ryou, Hashimoto, George L., Urakawa, Seitaro, Takahashi, Jun, Tozuka, Miyako, Itoh, Yoichi, Yamashita, Misato, Usui, Fumihiko, Aoki, Tsutomu, Arima, Noriaki, Doi, Mamoru, Ichiki, Makoto, Ikeda, Shiro, Ita, Yoshifusa, Kasuga, Toshihiro, Kobayashi, Naoto, Kokubo, Mitsuru, Konishi, Masahiro, Maehara, Hiroyuki, Matsunaga, Noriyuki, Miyata, Takashi, Morii, Mikio, Morokuma, Tomoki, Motohara, Kentaro, Nakada, Yoshikazu, Okumura, Shin-ichiro, Sako, Shigeyuki, Sarugaku, Yuki, Sato, Mikiya, Shigeyama, Toshikazu, Soyano, Takao, Takahashi, Hidenori, Tarusawa, Ken'ichi, Tominaga, Nozomu, Watanabe, Jun-ichi, Yamashita, Takuya, Yoshikawa, Makoto
We report observations of a stellar occultation by the classical Kuiper belt object (50000) Quaoar occurred on 28 June 2019. A single-chord high-cadence (2 Hz) photometry dataset was obtained with the Tomo-e Gozen CMOS camera mounted on the 1.05 m Sc
Externí odkaz:
http://arxiv.org/abs/1910.09988
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:
http://arxiv.org/abs/1904.12874
Autor:
Ita, Yoshifusa, Matsunaga, Noriyuki, Tanabe, Toshihiko, Nakada, Yoshikazu, Kato, Daisuke, Nagayama, Takahiro, Nagashima, Chie, Kurita, Mikio, Nakajima, Yasushi, Whitelock, Patricia A., Menzies, John W., Feast, Michael W., Nagata, Tetsuya, Tamura, Motohide, Nakaya, Hidehiko
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
Externí odkaz:
http://arxiv.org/abs/1810.01617
Autor:
Ohsawa, Ryou, Sako, Shigeyuki, Sarugaku, Yuki, Usui, Fumihiko, Ootsubo, Takafumi, Fujiwara, Yasunori, Sato, Mikiya, Kasuga, Toshihiro, Arimatsu, Ko, Watanabe, Jun-ichi, Doi, Mamoru, Kobayashi, Naoto, Takahashi, Hidenori, Motohara, Kentaro, Morokuma, Tomoki, Konishi, Masahiro, Aoki, Tsutomu, Soyano, Takao, Tarusawa, Ken'ichi, Mori, Yuki, Nakada, Yoshikazu, Ichiki, Makoto, Arima, Noriaki, Kojima, Yuto, Morita, Masahiro, Shigeyama, Toshikazu, Ita, Yoshifusa, Kokubo, Mitsuru, Mitsuda, Kazuma, Maehara, Hiroyuki, Tominaga, Nozomu, Yamashita, Takuya, Ikeda, Shiro, Morii, Mikio, Urakawa, Seitaro, Okumura, Shin-ichiro, Yoshikawa, Makoto
Imaging observations of faint meteors were carried out on April 11 and 14, 2016 with a wide-field CMOS mosaic camera, Tomo-e PM, mounted on the 105-cm Schmidt telescope at Kiso Observatory, the University of Tokyo. Tomo-e PM, which is a prototype mod
Externí odkaz:
http://arxiv.org/abs/1809.08816