Zobrazeno 1 - 10
of 112
pro vyhledávání: '"Tamura A"'
Autor:
Yuki Omiya, Kazuhiro Nakazawa, Kyoko Matsushita, Shogo B Kobayashi, Nobuhiro Okabe, Kosuke Sato, Takayuki Tamura, Yutaka Fujita, Liyi Gu, Tetsu Kitayama, Takuya Akahori, Kohei Kurahara, Tomohiro Yamaguchi
Publikováno v:
Publications of the Astronomical Society of Japan. 75:37-51
CIZA J1358.9−4750 is a nearby galaxy cluster in the early phase of a major merger. The two-dimensional temperature map using XMM-Newton EPIC-PN observation confirms the existence of a high-temperature region, which we call the “hot region,” in
Autor:
Mitsuhiko Honda, Ryo Tazaki, Koji Murakawa, Hiroshi Terada, Tomoyuki Kudo, Takashi Hattori, Jun Hashimoto, Motohide Tamura, Makoto Watanabe
Publikováno v:
Publications of the Astronomical Society of Japan. 74:851-856
Spatially resolved L-band spectro-polarimetric observations were carried out toward a protoplanetary disk around the Herbig Fe star HD 142527 using the polarimetry mode of the InfraRed Camera and Spectrometer on the 8.2 m Subaru Telescope. The 2.9–
Autor:
Taiki Kagetani, Norio Narita, Tadahiro Kimura, Teruyuki Hirano, Masahiro Ikoma, Hiroyuki Tako Ishikawa, Steven Giacalone, Akihiko Fukui, Takanori Kodama, Rebecca Gore, Ashley Schroeder, Yasunori Hori, Kiyoe Kawauchi, Noriharu Watanabe, Mayuko Mori, Yujie Zou, Kai Ikuta, Vigneshwaran Krishnamurthy, Jon Zink, Kevin Hardegree-Ullman, Hiroki Harakawa, Tomoyuki Kudo, Takayuki Kotani, Takashi Kurokawa, Nobuhiko Kusakabe, Masayuki Kuzuhara, Jerome P de Leon, John H Livingston, Jun Nishikawa, Masashi Omiya, Enric Palle, Hannu Parviainen, Takuma Serizawa, Huan-Yu Teng, Akitoshi Ueda, Motohide Tamura
Publikováno v:
Publications of the Astronomical Society of Japan.
We report on the determination of the mass of TOI-519 b, a transiting substellar object around a mid-M dwarf. We carried out radial velocity measurements using Subaru/InfraRed Doppler (IRD), revealing that TOI-519 b is a planet with a mass of $0.463^
Autor:
Akiharu Nakagawa, Atsushi Morita, Nobuyuki Sakai, Tomoharu Kurayama, Hiroshi Sudou, Gabor Orosz, Akito Yuda, Daichi Kaseda, Masako Matsuno, Shota Hamada, Toshihiro Omodaka, Yuji Ueno, Katsunori M Shibata, Yoshiaki Tamura, Takaaki Jike, Ken Hirano, Mareki Honma
Publikováno v:
Publications of the Astronomical Society of Japan.
The results of astrometric very long baseline interferometry (VLBI) observations toward an extreme OH/IR star candidate NSV 17351 are presented. Using the VERA (VLBI Exploration of Radio Astrometry) VLBI array , we observed 22 GHz H2O masers of NSV 1
Autor:
Wako Aoki, Timothy C Beers, Satoshi Honda, Hiroyuki T Ishikawa, Tadafumi Matsuno, Vinicius M Placco, Jinmi Yoon, Hiroki Harakawa, Teruyuki Hirano, Klaus Hodapp, Masato Ishizuka, Shane Jacobson, Takayuki Kotani, Tomoyuki Kudo, Takashi Kurokawa, Masayuki Kuzuhara, Jun Nishikawa, Masashi Omiya, Takuma Serizawa, Motohide Tamura, Akitoshi Ueda, Sébastien Vievard
Publikováno v:
Publications of the Astronomical Society of Japan, 74(2), 273-282. Oxford University Press
Silicon and Strontium are key elements to explore the nucleosynthesis and chemical evolution of the Galaxy by measurements of very metal-poor stars. There are, however, only a few useful spectral lines of these elements in the optical range that are
Autor:
Hiroki Harakawa, Takuma Serizawa, Klaus W. Hodapp, Teruyuki Hirano, Motohide Tamura, Jun Nishikawa, Akitoshi Ueda, Masayuki Kuzuhara, Takashi Kurokawa, Mihoko Konishi, Takayuki Kotani, Eric Gaidos, Tomoyuki Kudo, Sébastien Vievard, Masato Ishizuka, Masashi Omiya, Shane Jacobson, Bun'ei Sato
Publikováno v:
Publications of the Astronomical Society of Japan. 72
Precision radial velocity (RV) measurements in the near-infrared are a powerful tool to detect and characterize exoplanets around low-mass stars or young stars with higher magnetic activity. However, the presence of strong telluric absorption lines a
Autor:
Tomoharu Kurayama, Tomoya Hirota, Yukitoshi Kan-ya, Yuuki Adachi, Mareki Honma, Takumi Nagayama, Yoshiaki Tamura
Publikováno v:
Publications of the Astronomical Society of Japan. 72
We present the VEra Data Analyzer (VEDA) software package for Very Long Baseline Interferometry (VLBI) phase-referencing observations and parallax measurements. The Japanese VLBI project VLBI Exploration of Radio Astrometry (VERA) provides high-preci
Autor:
Aleksander S. Sklyanov, Kojiguchi Naoto, Mariko Kimura, Tomas Medulka, Akihiko Fukui, Tonny Vanmunster, Javier Ruiz, Daisaku Nogami, Charles Galdies, Yuka Terada, Motohide Tamura, Kirill A. Antonyuk, Yusuke Tampo, Pavol A. Dubovsky, M. A. Burlak, Tamás Tordai, Nikolaj V. Pit, A. Belinski, Igor Kudzej, Brandon McIntyre, Roi Alonso, Masanori Mizutani, Egor O. Mishin, Norio Narita, Taichi Kato, Ian Miller, K. Kawauchi, Nicolas Crouzet, Felipe Mugas, Julia V. Babina, Taku Nishiumi, Kenneth Menzies, Geoffrey Stone, Sergey A. Potanin, Enric Palle, Víctor J. S. Béjar, Noriharu Watanabe, N. P. Ikonnikova, Jesse Leahy-McGregor, Aleksei V. Baklanov, Nobuhiko Kusakabe, Michael Richmond, Yasuyuki Wakamatsu, A. V. Dodin, A. M. Zubareva, Keisuke Isogai, Stephen M. Brincat, Hiroshi Itoh, Kirill Sokolovsky, Oksana I. Antonyuk, Hidehiko Akazawa, Roger D. Pickard, Elena P. Pavlenko, Núria Casasayas-Barris
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
arXiv:2004.10508v1
et al.
We report on photometric and spectroscopic observations and analysis of the 2019 superoutburst of TCP J21040470+4631129. This object showed a 9 mag superoutburst with early superhumps and ordinary superhumps, which
et al.
We report on photometric and spectroscopic observations and analysis of the 2019 superoutburst of TCP J21040470+4631129. This object showed a 9 mag superoutburst with early superhumps and ordinary superhumps, which
Autor:
Takaaki Jike, Katsunori M. Shibata, Tomoya Hirota, Mi Kyoung Kim, Toshihiro Omodaka, Hideyuki Kobayashi, Mareki Honma, Takumi Nagayama, Akiharu Nakagawa, Tomoaki Oyama, Daisuke Sakai, Yoshiaki Tamura
Publikováno v:
Publications of the Astronomical Society of Japan. 72
Very Long Baseline Interferometry (VLBI) astrometry using the phase-referencing technique remains an open issue for the quantitative characterization of the observing conditions to achieve a feasible parallax precision of 10 micro-arcseconds (μas).
Autor:
Takumi Nagayama, Yoshiaki Tamura, Atsushi Morita, Tomoharu Kurayama, Mareki Honma, Toshihiro Omodaka, Akiharu Nakagawa, Katsunori M. Shibata, Yuji Ueno, Masako Matsuno, Takaaki Jike
Publikováno v:
Publications of the Astronomical Society of Japan. 72
We report the results of astrometric VLBI observations toward the Mira variable star BX Cam using the VERA VLBI array. The observation was performed from 2012 February to 2014 November. The parallax obtained is 1.73 ± 0.03 mas corresponding to a dis