Zobrazeno 1 - 10
of 1 104
pro vyhledávání: '"Nishikawa, Jun"'
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:
Tanaka, Masaomi, Domoto, Nanae, Aoki, Wako, Ishigaki, Miho N., Wanajo, Shinya, Hotokezaka, Kenta, Kawaguchi, Kyohei, Kato, Daiji, Lee, Jae-Joon, Lee, Ho-Gyu, Hirano, Teruyuki, Kotani, Takayuki, Kuzuhara, Masayuki, Nishikawa, Jun, Omiya, Masashi, Tamura, Motohide, Ueda, Akitoshi
Observations of the kilonova from a neutron star merger event GW170817 opened a way to directly study r-process nucleosynthesis by neutron star mergers. It is, however, challenging to identify the individual elements in the kilonova spectra due to la
Externí odkaz:
http://arxiv.org/abs/2306.04697
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:
Hirano, Teruyuki, Dai, Fei, Livingston, John H., Kasagi, Yui, Narita, Norio, Ishikawa, Hiroyuki Tako, Grziwa, Sascha, Lam, Kristine W. F., Miyakawa, Kohei, Serrano, Luisa M., Matsumoto, Yuji, Kokubo, Eiichiro, Kimura, Tadahiro, Ikoma, Masahiro, Winn, Joshua N., Wisniewski, John P., Harakawa, Hiroki, Teng, Huan-Yu, Cochran, William D., Fukui, Akihiko, Gandolfi, Davide, Guenther, Eike W., Hori, Yasunori, Ikuta, Kai, Kawauchi, Kiyoe, Knudstrup, Emil, Korth, Judith, Kotani, Takayuki, Krishnamurthy, Vigneshwaran, Kudo, Tomoyuki, Kurokawa, Takashi, Kuzuhara, Masayuki, Luque, Rafael, Mori, Mayuko, Nishikawa, Jun, Omiya, Masashi, Orell-Miquel, Jaume, Palle, Enric, Persson, Carina M., Redfield, Seth, Serabyn, Eugene, Smith, Alexis M. S., Takahashi, Aoi, Takarada, Takuya, Ueda, Akitoshi, Van Eylen, Vincent, Vievard, Sebastien, Tamura, Motohide, Sato, Bun'ei
We report on the discovery of an Earth-sized transiting planet ($R_p=1.015\pm0.051\,R_\oplus$) in a $P=4.02$ day orbit around K2-415 (EPIC 211414619), an M5V star at 22 pc. The planet candidate was first identified by analyzing the light curve data b
Externí odkaz:
http://arxiv.org/abs/2302.00699
Autor:
Currie, Thayne, Brandt, G. Mirek, Brandt, Timothy D., Lacy, Brianna, Burrows, Adam, Guyon, Olivier, Tamura, Motohide, Liu, Ranger Y., Sagynbayeva, Sabina, Tobin, Taylor, Chilcote, Jeffrey, Groff, Tyler, Marois, Christian, Thompson, William, Murphy, Simon, Kuzuhara, Masayuki, Lawson, Kellen, Lozi, Julien, Deo, Vincent, Vievard, Sebastien, Skaf, Nour, Uyama, Taichi, Jovanovic, Nemanja, Martinache, Frantz, Kasdin, N. Jeremy, Kudo, Tomoyuki, McElwain, Michael, Janson, Markus, Wisniewski, John, Hodapp, Klaus, Nishikawa, Jun, Helminiak, Krzysztof, Kwon, Jungmi, Hayashi, Masa
Direct imaging of gas giant exoplanets provides key information on planetary atmospheres and the architectures of planetary systems. However, few planets have been detected in blind surveys used to achieve imaging detections. Using Gaia and Hipparcos
Externí odkaz:
http://arxiv.org/abs/2212.00034
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