Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Imai, Masataka"'
Autor:
Lee, Yeon Joo, Muñoz, Antonio García, Yamazaki, Atsushi, Quémerais, Eric, Mottola, Stefano, Hellmich, Stephan, Granzer, Thomas, Bergond, Gilles, Roth, Martin, Gallego-Cano, Eulalia, Chaufray, Jean-Yves, Robidel, Rozenn, Murakami, Go, Masunaga, Kei, Kaplan, Murat, Erece, Orhan, Hueso, Ricardo, Kabáth, Petr, Špoková, Magdaléna, Sánchez-Lavega, Agustín, Kim, Myung-Jin, Mangano, Valeria, Jessup, Kandis-Lea, Widemann, Thomas, Sugiyama, Ko-ichiro, Watanabe, Shigeto, Yamada, Manabu, Satoh, Takehiko, Nakamura, Masato, Imai, Masataka, Cabrera, Juan
We performed a unique Venus observation campaign to measure the disk brightness of Venus over a broad range of wavelengths in August and September 2020. The primary goal of the campaign is to investigate the absorption properties of the unknown absor
Externí odkaz:
http://arxiv.org/abs/2207.13495
Autor:
Ishiguro, Masateru, Bach, Yoonsoo P., Geem, Jooyeon, Naito, Hiroyuki, Kuroda, Daisuke, Im, Myungshin, Lee, Myung Gyoon, Seo, Jinguk, Jin, Sunho, Kwon, Yuna G., Oono, Tatsuharu, Takagi, Seiko, Sato, Mitsuteru, Kuramoto, Kiyoshi, Ito, Takashi, Hasegawa, Sunao, Yoshida, Fumi, Arai, Tomoko, Akitaya, Hiroshi, Sekiguchi, Tomohiko, Okazaki, Ryo, Imai, Masataka, Ohtsuka, Katsuhito, Watanabe, Makoto, Takahashi, Jun, Devogele, Maxime, Fedorets, Grigori, Siltala, Lauri, Granvik, Mikael
The investigation of asteroids near the Sun is important for understanding the final evolutionary stage of primitive solar system objects. A near-Sun asteroid, (155140) 2005 UD, has orbital elements similar to those of (3200) Phaethon (the target ast
Externí odkaz:
http://arxiv.org/abs/2111.00152
Autor:
Geem, Jooyeon, Ishiguro, Masateru, Bach, Yoonsoo P., Kuroda, Daisuke, Naito, Hiroyuki, Hanayama, Hidekazu, Kim, Yoonyoung, Kwon, Yuna G., Jin, Sunho, Sekiguchi, Tomohiko, Okazaki, Ryo, Vaubaillon, Jeremie J., Imai, Masataka, Oono, Tatsuharu, Futamura, Yuki, Takagi, Seiko, Sato, Mitsuteru, Kuramoto, Kiyoshi, Watanabe, Makoto
Publikováno v:
A&A 658, A158 (2022)
Context. Asteroids in comet-like orbits (ACOs) consist of asteroids and dormant comets. Due to their similar appearance, it is challenging to distinguish dormant comets from ACOs via general telescopic observations. Surveys for discriminating dormant
Externí odkaz:
http://arxiv.org/abs/2111.00151
Autor:
Okazaki, Ryo, Sekiguchi, Tomohiko, Ishiguro, Masateru, Naito, Hiroyuki, Urakawa, Seitaro, Imai, Masataka, Ono, Tatsuharu, Warner, Brian D., Watanabe, Makoto
We report on optical polarimetric observations of two Apollo type near-Earth asteroids, (422699) 2000 PD3 and (3200) Phaethon, and BVRI photometric observations of 2000 PD3 using the 1.6m Pirka telescope in 2017. We derived the geometric albedo of pv
Externí odkaz:
http://arxiv.org/abs/1910.04305
Autor:
Imai, Masataka, Kouyama, Toru, Takahashi, Yukihiro, Yamazaki, Atsushi, Watanabe, Shigeto, Yamada, Manabu, Imamura, Takeshi, Satoh, Takehiko, Nakamura, Masato, Murakami, Shin-ya, Ogohara, Kazunori, Horinouchi, Takeshi
Planetary-scale waves at the Venusian cloud-top cause periodic variations in both winds and ultraviolet (UV) brightness. While the wave candidates are the 4-day Kelvin wave and 5-day Rossby wave with zonal wavenumber 1, their temporal evolutions are
Externí odkaz:
http://arxiv.org/abs/1908.08220
Akademický článek
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Significantly high polarization degree of the very low-albedo asteroid (152679) 1998 KU$_\mathrm{2}$
Autor:
Kuroda, Daisuke, Ishiguro, Masateru, Watanabe, Makoto, Hasegawa, Sunao, Sekiguchi, Tomohiko, Naito, Hiroyuki, Usui, Fumihiko, Imai, Masataka, Sato, Mitsuteru, Kuramoto, Kiyoshi
Publikováno v:
A&A 611, A31 (2018)
We present a unique and significant polarimetric result regarding the near-Earth asteroid (152679) 1998 KU$_\mathrm{2}$ , which has a very low geometric albedo. From our observations, we find that the linear polarization degrees of 1998 KU$_\mathrm{2
Externí odkaz:
http://arxiv.org/abs/1712.01444
Autor:
Ishiguro, Masateru, Kuroda, Daisuke, Watanabe, Makoto, Bach, Yoonsoo P., Kim, Jooyeon, Lee, Mingyeong, Sekiguchi, Tomohiko, Naito, Hiroyuki, Ohtsuka, Katsuhito, Hanayama, Hidekazu, Hasegawa, Sunao, Usui, Fumihiko, Urakawa, Seitaro, Imai, Masataka, Sato, Mitsuteru, Kuramoto, Kiyoshi
We conducted a polarimetric observation of the fast-rotating near-Earth asteroid (1566) Icarus at large phase (Sun-asteroid-observer's) angles $\alpha$= 57 deg--141deg around the 2015 summer solstice. We found that the maximum values of the linear po
Externí odkaz:
http://arxiv.org/abs/1709.01603
Autor:
Morokuma, Tomoki, Tanaka, Masaomi, Tanaka, Yasuyuki T., Itoh, Ryosuke, Tominaga, Nozomu, Gandhi, Poshak, Pian, Elena, Mazzali, Paolo, Ohta, Kouji, Matsumoto, Emiko, Shibata, Takumi, Akimoto, Hinako, Akitaya, Hiroshi, Ali, Gamal B., Aoki, Tsutomu, Doi, Mamoru, Ebisuda, Nana, Essam, Ahmed, Fujisawa, Kenta, Fukushima, Hideo, Goda, Shuhei, Gouda, Yuya, Hanayama, Hidekazu, Hashiba, Yasuhito, Hashimoto, Osamu, Hayashida, Kenzo, Hiratsuka, Yuichiro, Honda, Satoshi, Imai, Masataka, Inoue, Kanichiro, Ishibashi, Michiko, Iwata, Ikuru, Izumiura, Hideyuki, Kanda, Yuka, Kawabata, Miho, Kawaguchi, Kenji, Kawai, Nobuyuki, Kokubo, Mitsuru, Kuroda, Daisuke, Maehara, Hiroyuki, Mito, Hiroyuki, Mitsuda, Kazuma, Miyagawa, Ryota, Miyaji, Takeshi, Miyamoto, Yusuke, Morihana, Kumiko, Moritani, Yuki, Morokuma-Matsui, Kana, Murakami, Kotone, Murata, Katsuhiro L., Nagayama, Takahiro, Nakamura, Kazuki, Nakaoka, Tatsuya, Niinuma, Kotaro, Nishimori, Takafumi, Nogami, Daisaku, Oasa, Yumiko, Oda, Tatsunori, Ohshima, Tomohito, Saito, Yoshihiko, Sakata, Shuichiro, Sako, Shigeyuki, Sarugaku, Yuki, Sawada-Satoh, Satoko, Seino, Genta, Sorai, Kazuo, Soyano, Takao, Taddia, Francesco, Takahashi, Jun, Takagi, Yuhei, Takaki, Katsutoshi, Takata, Koji, Tarusawa, Ken'ichi, Uemura, Makoto, Ui, Takahiro, Urago, Riku, Ushioda, Kazutoshi, Watanabe, Jun-ichi, Watanabe, Makoto, Yamashita, Satoshi, Yanagisawa, Kenshi, Yonekura, Yoshinori, Yoshida, Michitoshi
We present monitoring campaign observations at optical and near-infrared (NIR) wavelengths for a radio-loud active galactic nucleus (AGN) at z=0.840, SDSS~J110006.07+442144.3 (hereafter, J1100+4421), which was identified during a flare phase in late
Externí odkaz:
http://arxiv.org/abs/1707.05416
Autor:
Yamanaka, Masayuki, Nakaoka, Tatsuya, Tanaka, Masaomi, Maeda, Keiichi, Honda, Satoshi, Hanayama, Hidekazu, Morokuma, Tomoki, Imai, Masataka, Kinugasa, Kenzo, Murata, Katsuhiro L., Nishimori, Takefumi, Hashimoto, Osamu, Gima, Hirotaka, Hosoya, Kensuke, Ito, Ayano, Karita, Mayu, Kawabata, Miho, Morihana, Kumiko, Morikawa, Yuto, Murakami, Kotone, Nagayama, Takahiro, Ono, Tatsuharu, Onozato, Hiroki, Sarugaku, Yuki, Sato, Mitsuteru, Suzuki, Daisuke, Takahashi, Jun, Takayama, Masaki, Yaguchi, Hijiri, Akitaya, Hiroshi, Asakura, Yuichiro, Kawabata, Koji S., Kuroda, Daisuke, Nogami, Daisaku, Oasa, Yumiko, Omodaka, Toshihiro, Saito, Yoshihiko, Sekiguchi, Kazuhiro, Tominaga, Nozomu, Uemura, Makoto, Watanabe, Makoto
We present the early-phase spectra and the light curves of the broad-lined supernova (SN) 2016coi from $t=7$ to $67$ days after the estimated explosion date. This SN was initially reported as a broad-lined Type SN Ic (SN Ic-BL). However, we found tha
Externí odkaz:
http://arxiv.org/abs/1702.02035