Zobrazeno 1 - 10
of 126
pro vyhledávání: '"ISHIZUKA, Masato"'
Autor:
Uyama, Taichi, Beichman, Charles, Kuzuhara, Masayuki, Janson, Markus, Kotani, Takayuki, Mawet, Dimitri, Sato, Bun'ei, Tamura, Motohide, Ishikawa, Hiroyuki Tako, Cale, Bryson, Currie, Thayne, Harakawa, Hiroki, Henning, Thomas, Hirano, Teruyuki, Hodapp, Klaus, Hori, Yasunori, Ishizuka, Masato, Jacobson, Shane, Kasagi, Yui, Kokubo, Eiichiro, Konishi, Mihoko, Kudo, Tomoyuki, Kurokawa, Takashi, Kusakabe, Nobuhiko, Kwon, Jungmi, Machida, Masahiro, Nakagawa, Takao, Narita, Norio, Nishikawa, Jun, Ogihara, Masahiro, Omiya, Masashi, Serizawa, Takuma, Ueda, Akitoshi, Vievard, Sebastien, Wang, Ji
The Subaru telescope is currently performing a strategic program (SSP) using the high-precision near-infrared (NIR) spectrometer IRD to search for exoplanets around nearby mid/late-M~dwarfs via radial velocity (RV) monitoring. As part of the observin
Externí odkaz:
http://arxiv.org/abs/2302.13354
Autor:
Harakawa, Hiroki, Takarada, Takuya, Kasagi, Yui, Hirano, Teruyuki, Kotani, Takayuki, Kuzuhara, Masayuki, Omiya, Masashi, Kawahara, Hajime, Fukui, Akihiko, Hori, Yasunori, Ishikawa, Hiroyuki Tako, Ogihara, Masahiro, Livingston, John, Brandt, Timothy D., Currie, Thayne, Aoki, Wako, Beichman, Charles A., Henning, Thomas, Hodapp, Klaus, Ishizuka, Masato, Izumiura, Hideyuki, Jacobson, Shane, Janson, Markus, Kambe, Eiji, Kodama, Takanori, Kokubo, Eiichiro, Konishi, Mihoko, Krishnamurthy, Vigneshwaran, Kudo, Tomoyuki, Kurokawa, Takashi, Kusakabe, Nobuhiko, Kwon, Jungmi, Matsumoto, Yuji, McElwain, Michael W., Mitsui, Koyu, Nakagawa, Takao, Narita, Norio, Nishikawa, Jun, Nugroho, Stevanus K., Serabyn, Eugene, Serizawa, Takuma, Takahashi, Aoi, Ueda, Akitoshi, Uyama, Taichi, Vievard, Sébastien, Wang, Ji, Wisniewski, John, Tamura, Motohide, Sato, Bun'ei
We report the near-infrared radial-velocity (RV) discovery of a super-Earth planet on a 10.77-day orbit around the M4.5 dwarf Ross 508 ($J_\mathrm{mag}=9.1$). Using precision RVs from the Subaru Telescope IRD (InfraRed Doppler) instrument, we derive
Externí odkaz:
http://arxiv.org/abs/2205.11986
Autor:
Aoki, Wako, Beers, Timothy C., Honda, Satoshi, Ishikawa, Hiroyuki T., Matsuno, Tadafumi, Placco, Vinicius M., Yoon, Jinmi, Harakawa, Hiroki, Hirano, Teruyuki, Hodapp, Klaus, Ishizuka, Masato, Jacobson, Shane, Kotani, Takayuki, Kudo, Tomoyuki, Kurokawa, Takashi, Kuzuhara, Masayuki, Nishikawa, Jun, Omiya, Masashi, Serizawa, Takuma, Tamura, Motohide, Ueda, Akitoshi, Vievard, Sebastien
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
Externí odkaz:
http://arxiv.org/abs/2112.07433
Autor:
Nugroho, Stevanus K., Kawahara, Hajime, Gibson, Neale P., de Mooij, Ernst J. W., Hirano, Teruyuki, Kotani, Takayuki, Kawashima, Yui, Masuda, Kento, Brogi, Matteo, Birkby, Jayne L., Watson, Chris A., Tamura, Motohide, Zwintz, Konstanze, Harakawa, Hiroki, Kudo, Tomoyuki, Kuzuhara, Masayuki, Hodapp, Klaus, Ishizuka, Masato, Jacobson, Shane, Konishi, Mihoko, Kurokawa, Takashi, Nishikawa, Jun, Omiya, Masashi, Serizawa, Takuma, Ueda, Akitoshi, Vievard, Sébastien
We report the first detection of a hydroxyl radical (OH) emission signature in the planetary atmosphere outside the solar system, in this case, in the day-side of WASP-33b. We analyze high-resolution near-infrared emission spectra of WASP-33b taken u
Externí odkaz:
http://arxiv.org/abs/2103.03094
Autor:
Ishizuka, Masato, Kawahara, Hajime, Nugroho, Stevanus K., Kawashima, Yui, Hirano, Teruyuki, Tamura, Motohide
Recent progress in high-dispersion spectroscopy has revealed the presence of vaporized heavy metals and ions in the atmosphere of hot Jupiters whose dayside temperature is larger than 2000 K, categorized as ultra hot Jupiters (UHJs). Using the archiv
Externí odkaz:
http://arxiv.org/abs/2102.00211
Autor:
Hirano, Teruyuki, Kuzuhara, Masayuki, Kotani, Takayuki, Omiya, Masashi, Kudo, Tomoyuki, Harakawa, Hiroki, Vievard, Sébastien, Kurokawa, Takashi, Nishikawa, Jun, Tamura, Motohide, Hodapp, Klaus, Ishizuka, Masato, Jacobson, Shane, Konishi, Mihoko, Serizawa, Takuma, Ueda, Akitoshi, Gaidos, Eric, Sato, Bun'ei
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
Externí odkaz:
http://arxiv.org/abs/2007.11013
Autor:
Hirano, Teruyuki, Krishnamurthy, Vigneshwaran, Gaidos, Eric, Flewelling, Heather, Mann, Andrew W., Narita, Norio, Plavchan, Peter, Kotani, Takayuki, Tamura, Motohide, Harakawa, Hiroki, Hodapp, Klaus, Ishizuka, Masato, Jacobson, Shane, Konishi, Mihoko, Kudo, Tomoyuki, Kurokawa, Takashi, Kuzuhara, Masayuki, Nishikawa, Jun, Omiya, Masashi, Serizawa, Takuma, Ueda, Akitoshi, Vievard, Sébastien
We obtained spectra of the pre-main sequence star AU Microscopii during a transit of its Neptune-sized planet to investigate its orbit and atmosphere. We used the high-dispersion near-infrared spectrograph IRD on the Subaru telescope to detect the Do
Externí odkaz:
http://arxiv.org/abs/2006.13243
Autor:
Hirano, Teruyuki, Gaidos, Eric, Winn, Joshua N., Dai, Fei, Fukui, Akihiko, Kuzuhara, Masayuki, Kotani, Takayuki, Tamura, Motohide, Hjorth, Maria, Albrecht, Simon, Huber, Daniel, Bolmont, Emeline, Harakawa, Hiroki, Hodapp, Klaus, Ishizuka, Masato, Jacobson, Shane, Konishi, Mihoko, Kudo, Tomoyuki, Kurokawa, Takashi, Nishikawa, Jun, Omiya, Masashi, Serizawa, Takuma, Ueda, Akitoshi, Weiss, Lauren M.
In an effort to measure the Rossiter-McLaughlin effect for the TRAPPIST-1 system, we performed high-resolution spectroscopy during transits of planets e, f, and b. The spectra were obtained with the InfraRed Doppler spectrograph on the Subaru 8.2-m t
Externí odkaz:
http://arxiv.org/abs/2002.05892
Autor:
Purevsuren, Munkhtuul, Uehara, Masae, Ishizuka, Masato, Suzuki, Yuichi, Shimbo, Mai, Kakuda, Nobutaka, Ishii, Satoshi, Sumida, Hayakazu, Miyazaki, Miki, Yamashita, Takashi, Yoshizaki, Ayumi, Asano, Yoshihide, Sato, Shinichi, Hatano, Masaru, Komuro, Issei
Publikováno v:
In Journal of Cardiology August 2023 82(2):100-107
Autor:
Ishizuka, Masato, Kotani, Takayuki, Nishikawa, Jun, Kurokawa, Takashi, Mori, Takahiro, Kokubo, Tsukasa, Tamura, Motohide
We report the results of fiber mode scrambler experiments for the Infra-Red Doppler instrument (IRD) on the Subaru 8.2-m telescope. IRD is a fiber-fed, high precision radial velocity (RV) instrument to search for exoplanets around nearby M dwarfs at
Externí odkaz:
http://arxiv.org/abs/1803.08702