Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Serizawa, Takuma"'
Autor:
Hirano, Teruyuki, Gaidos, Eric, Harakawa, Hiroki, Hodapp, Klaus W., Kotani, Takayuki, Kudo, Tomoyuki, Kurokawa, Takashi, Kuzuhara, Masayuki, Mann, Andrew W., Nishikawa, Jun, Omiya, Masashi, Serizawa, Takuma, Tamura, Motohide, Thao, Pa Chia, Ueda, Akitoshi, Vievard, Sebastien
Exoplanets in their infancy are ideal targets to probe the formation and evolution history of planetary systems, including the planet migration and atmospheric evolution and dissipation. In this paper, we present spectroscopic observations and analys
Externí odkaz:
http://arxiv.org/abs/2404.07262
Autor:
Wright, Sam O. M., Nugroho, Stevanus K., Brogi, Matteo, Gibson, Neale P., de Mooij, Ernst J. W., Waldmann, Ingo, Tennyson, Jonathan, Kawahara, Hajime, Kuzuhara, Masayuki, Hirano, Teruyuki, Kotani, Takayuki, Kawashima, Yui, Masuda, Kento, Birkby, Jayne L., Watson, Chris A., Tamura, Motohide, Zwintz, Konstanze, Harakawa, Hiroki, Kudo, Tomoyuki, Hodapp, Klaus, Jacobson, Shane, Konishi, Mihoko, Kurokawa, Takashi, Nishikawa, Jun, Omiya, Masashi, Serizawa, Takuma, Ueda, Akitoshi, Vievard, Sébastien, Yurchenko, Sergei N.
Individual vibrational band spectroscopy presents an opportunity to examine exoplanet atmospheres in detail by distinguishing where the vibrational state populations of molecules differ from the current assumption of a Boltzmann distribution. Here, r
Externí odkaz:
http://arxiv.org/abs/2305.11071
Autor:
Kagetani, Taiki, Narita, Norio, Kimura, Tadahiro, Hirano, Teruyuki, Ikoma, Masahiro, Ishikawa, Hiroyuki Tako, Giacalone, Steven, Fukui, Akihiko, Kodama, Takanori, Gore, Rebecca, Schroeder, Ashley, Hori, Yasunori, Kawauchi, Kiyoe, Watanabe, Noriharu, Mori, Mayuko, Zou, Yujie, Ikuta, Kai, Krishnamurthy, Vigneshwaran, Zink, Jon, Hardegree-Ullman, Kevin, Harakawa, Hiroki, Kudo, Tomoyuki, Kotani, Takayuki, Kurokawa, Takashi, Kusakabe, Nobuhiko, Kuzuhara, Masayuki, de Leon, Jerome P., Livingston, John H., Nishikawa, Jun, Omiya, Masashi, Palle, Enric, Parviainen, Hannu, Serizawa, Takuma, Teng, Huan-Yu, Ueda, Akitoshi, Tamura, Motohide
We report the mass determination 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^{+0.082}
Externí odkaz:
http://arxiv.org/abs/2304.14703
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:
Krishnamurthy, Vigneshwaran, Hirano, Teruyuki, Gaidos, Eric, Sato, Bunei, Kopparapu, Ravi, Barclay, Thomas, Garcia-Sage, Katherine, Harakawa, Hiroki, Hodapp, Klaus, Jacobson, Shane, Konishi, Mihoko, Kotani, Takayuki, Kudo, Tomoyuki, Kurokawa, Takashi, Kuzuhara, Masayuki, Lopez, Eric, Nishikawa, Jun, Omiya, Masashi, Schlieder, Joshua E., Serizawa, Takuma, Tamura, Motohide, Ueda, Akitoshi, Vievard, Sebastien
\textit{Kepler} showed a paucity of planets with radii of 1.5 - 2 $\mathrm R_{\oplus}$ around solar mass stars but this radius-gap has not been well studied for low-mass star planets. Energy-driven escape models like photoevaporation and core-powered
Externí odkaz:
http://arxiv.org/abs/2302.01479
Autor:
Gaidos, Eric, Hirano, Teruyuki, Lee, Rena A., Harakawa, Hiroki, Hodapp, Klaus, Jacobson, Shane, Kotani, Takayuki, Kudo, Tomoyuki, Kurokawa, Takashi, Kuzuhara, Masayuki, Nishikawa, Jun, Omiya, Masashi, Serizawa, Takuma, Tamura, Motohide, Ueda, Akitoshi, Vievard, Sebastien
We report a search for excess absorption in the 1083.2 nm line of ortho (triplet) helium during transits of TOI-1807b and TOI-2076b, 1.25 and 2.5R$_{\rm Earth}$ planets on 0.55- and 10.4-day orbits around nearby $\sim$200~Myr-old K dwarf stars. We li
Externí odkaz:
http://arxiv.org/abs/2211.02887
Autor:
Harakawa, Hiroki, Takarada, Takuya, Kasagi, Yui, Hirano, Teruyuki, Kotani, Takayuki, Kuzuhara, Masayuki, Omiya, Masashi, Kawahara, Hajime, Fukui, Akihiko, Hori, Yasunori, Ishikawa, Hiroyuki Tako, Ogihara, Masahiro, Livingston, John, Brandt, Timothy D., Currie, Thayne, Aoki, Wako, Beichman, Charles A., Henning, Thomas, Hodapp, Klaus, Ishizuka, Masato, Izumiura, Hideyuki, Jacobson, Shane, Janson, Markus, Kambe, Eiji, Kodama, Takanori, Kokubo, Eiichiro, Konishi, Mihoko, Krishnamurthy, Vigneshwaran, Kudo, Tomoyuki, Kurokawa, Takashi, Kusakabe, Nobuhiko, Kwon, Jungmi, Matsumoto, Yuji, McElwain, Michael W., Mitsui, Koyu, Nakagawa, Takao, Narita, Norio, Nishikawa, Jun, Nugroho, Stevanus K., Serabyn, Eugene, Serizawa, Takuma, Takahashi, Aoi, Ueda, Akitoshi, Uyama, Taichi, Vievard, Sébastien, Wang, Ji, Wisniewski, John, Tamura, Motohide, Sato, Bun'ei
We report the near-infrared radial-velocity (RV) discovery of a super-Earth planet on a 10.77-day orbit around the M4.5 dwarf Ross 508 ($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:
Mori, Mayuko, Livingston, John H., de Leon, Jerome, Narita, Norio, Hirano, Teruyuki, Fukui, Akihiko, Collins, Karen A., Fujita, Naho, Hori, Yasunori, Ishikawa, Hiroyuki Tako, Kawauchi, Kiyoe, Stassun, Keivan G., Watanabe, Noriharu, Giacalone, Steven, Gore, Rebecca, Schroeder, Ashley, Dressing, Courtney D., Bieryla, Allyson, Jensen, Eric L. N., Massey, Bob, Shporer, Avi, Kuzuhara, Masayuki, Charbonneau, David, Ciardi, David R., Doty, John P., Esparza-Borges, Emma, Harakawa, Hiroki, Hodapp, Klaus, Ikoma, Masahiro, Ikuta, Kai, Isogai, Keisuke, Jenkins, Jon M., Kagetani, Taiki, Kimura, Tadahiro, Kodama, Takanori, Kotani, Takayuki, Krishnamurthy, Vigneshwaran, Kudo, Tomoyuki, Kurita, Seiya, Kurokawa, Takashi, Kusakabe, Nobuhiko, Latham, David W., McLean, Brian, Murgas, Felipe, Nishikawa, Jun, Nishiumi, Taku, Omiya, Masashi, Osborn, Hugh P., Palle, Enric, Parviainen, Hannu, Ricker, George R., Seager, Sara, Serizawa, Takuma, Tamura, Motohide, Teng, Huan-Yu, Terada, Yuka, Twicken, Joseph D., Ueda, Akitoshi, Vanderspek, Roland, Vievard, Sébastien, Winn, Joshua N., Zou, Yujie
We present the discovery and validation of a temperate sub-Neptune around the nearby mid-M dwarf TIC 470381900 (TOI-1696), with a radius of $3.09 \pm 0.11 \,R_\oplus$ and an orbital period of $2.5 \,\rm{days}$, using a combination of TESS and follow-
Externí odkaz:
http://arxiv.org/abs/2203.02694
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:
Krishnamurthy, Vigneshwaran, Hirano, Teruyuki, Stefánsson, Guðmundur, Ninan, Joe P., Mahadevan, Suvrath, Gaidos, Eric, Kopparapu, Ravi, Sato, Bunei, Hori, Yasunori, Bender, Chad F., Cañas, Caleb I., Diddams, Scott A., Halverson, Samuel, Harakawa, Hiroki, Hawley, Suzanne, Hearty, Fred, Hebb, Leslie, Hodapp, Klaus, Jacobson, Shane, Kanodia, Shubham, Konishi, Mihoko, Kotani, Takayuki, Kowalski, Adam, Kudo, Tomoyuki, Kurokawa, Takashi, Kuzuhara, Masayuki, Lin, Andrea, Maney, Marissa, Metcalf, Andrew J., Morris, Brett, Nishikawa, Jun, Omiya, Masashi, Robertson, Paul, Roy, Arpita, Schwab, Christian, Serizawa, Takuma, Tamura, Motohide, Ueda, Akitoshi, Vievard, Sébastien, Wisniewski, John
We obtained high-resolution spectra of the ultra-cool M-dwarf TRAPPIST-1 during the transit of its planet `b' using two high dispersion near-infrared spectrographs, IRD instrument on the Subaru 8.2m telescope and HPF instrument on the 10m Hobby-Eberl
Externí odkaz:
http://arxiv.org/abs/2106.11444