Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Ikuta, Kai"'
Autor:
Gillon, Michaël, Pedersen, Peter P., Rackham, Benjamin V., Dransfield, Georgina, Ducrot, Elsa, Barkaoui, Khalid, Burdanov, Artem Y., Schroffenegger, Urs, Chew, Yilen Gómez Maqueo, Lederer, Susan M., Alonso, Roi, Burgasser, Adam J., Howell, Steve B., Narita, Norio, de Wit, Julien, Demory, Brice-Olivier, Queloz, Didier, Triaud, Amaury H. M. J., Delrez, Laetitia, Jehin, Emmanuël, Hooton, Matthew J., Garcia, Lionel J., Muñoz, Clàudia Jano, Murray, Catriona A., Pozuelos, Francisco J., Sebastian, Daniel, Timmermans, Mathilde, Thompson, Samantha J., Aceituno, Jesús, Aganze, Christian, Amado, Pedro J., Baycroft, Thomas, Benkhaldoun, Zouhair, Berardo, David, Bolmont, Emeline, Clark, Catherine A., Davis, Yasmin T., Davoudi, Fatemeh, de Beurs, Zoë L., de Leon, Jerome P., Ikoma, Masahiro, Ikuta, Kai, Isogai, Keisuke, Fukuda, Izuru, Fukui, Akihiko, Gerasimov, Roman, Ghachoui, Mourad, Günther, Maximilian N., Hasler, Samantha, Hayashi, Yuya, Heng, Kevin, Hu, Renyu, Kagetani, Taiki, Kawai, Yugo, Kawauchi, Kiyoe, Kitzmann, Daniel, Koll, Daniel D. B., Lendl, Monika, Livingston, John H., Lyu, Xintong, Valdés, Erik A. Meier, Mori, Mayuko, McCormac, James J., Murgas, Felipe, Niraula, Prajwal, Pallé, Enric, Plauchu-Frayn, Ilse, Rebolo, Rafael, Sabin, Laurence, Schackey, Yannick, Schanche, Nicole, Selsis, Franck, Sota, Alfredo, Stalport, Manu, Standing, Matthew R., Stassun, Keivan G., Tamura, Motohide, Theissen, Christopher A., Turbet, Martin, Van Grootel, Valérie, Varas, Roberto, Watanabe, Noriharu, Lang, Francis Zong
Located at the bottom of the main sequence, ultracool dwarf stars are widespread in the solar neighbourhood. Nevertheless, their extremely low luminosity has left their planetary population largely unexplored, and only one of them, TRAPPIST-1, has so
Externí odkaz:
http://arxiv.org/abs/2406.00794
Gliese 12 b: A temperate Earth-sized planet at 12 pc ideal for atmospheric transmission spectroscopy
Autor:
Kuzuhara, M., Fukui, A., Livingston, J. H., Caballero, J. A., de Leon, J. P., Hirano, T., Kasagi, Y., Murgas, F., Narita, N., Omiya, M., Orell-Miquel, Jaume, Palle, E., Changeat, Q., Esparza-Borges, E., Harakawa, H., Hellier, C., Hori, Yasunori, Ikuta, Kai, Ishikawa, H. T., Kodama, T., Kotani, T., Kudo, T., Morales, J. C., Mori, M., Nagel, E., Parviainen, H., Perdelwitz, V., Reiners, A., Ribas, I., Sanz-Forcada, J., Sato, B., Schweitzer, A., Tabernero, H. M., Takarada, T., Uyama, T., Watanabe, N., Zechmeister, M., García, N. Abreu, Aoki, W., Beichman, C., Béjar, V. J. S., Brandt, T. D., Calatayud-Borras, Y., Carleo, I., Charbonneau, D., Collins, K. A., Currie, T., Doty, J. P., Dreizler, S., Fernández-Rodríguez, G., Fukuda, I., Galán, D., Geraldía-González, S., González-Garcia, J., Hayashi, Y., Hedges, C., Henning, T., Hodapp, K., Ikoma, M., Isogai, K., Jacobson, S., Janson, M., Jenkins, J. M., Kagetani, T., Kambe, E., Kawai, Y., Kawauchi, K., Kokubo, E., Konishi, M., Korth, J., Krishnamurthy, V., Kurokawa, T., Kusakabe, N., Kwon, J., Laza-Ramos, A., Libotte, F., Luque, R., Madrigal-Aguado, A., Matsumoto, Y., Mawet, D., McElwain, M. W., Gallardo, P. P. Meni, Morello, G., Torres, S. Mu~noz, Nishikawa, J., Nugroho, S. K., Ogihara, M., Pel'aez-Torres, A., Rapetti, D., S'anchez-Benavente, M., Schlecker, M., Seager, S., Serabyn, E., Serizawa, T., Stangret, M., Takahashi, A., Teng, H., Tamura, M., Terada, Y., Ueda, A., Usuda, T., Vanderspek, R., Vievard, S., Watanabe, D., Winn, J. N., Osorio, M. R. Zapatero
Publikováno v:
Published on 2024 May 23 by Astrophysical Journal Letters (ApJL) 967 L21
Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres of terrestrial planets via follow-up spectroscopic observations. However, the number of such planets receiving low insolation i
Externí odkaz:
http://arxiv.org/abs/2405.14708
Autor:
Mori, Mayuko, Ikuta, Kai, Fukui, Akihiko, Narita, Norio, de Leon, Jerome P., Livingston, John H., Ikoma, Masahiro, Kawai, Yugo, Kawauchi, Kiyoe, Murgas, Felipe, Palle, Enric, Parviainen, Hannu, Rodríguez, Gareb Fernández, Terada, Yuka, Watanabe, Noriharu, Tamura, Motohide
Detailed atmospheric characterization of exoplanets by transmission spectroscopy requires careful consideration of stellar surface inhomogeneities induced by starspots. This effect is particularly problematic for planetary systems around M-dwarfs, an
Externí odkaz:
http://arxiv.org/abs/2403.13946
Autor:
Ikuta, Kai, Shibata, Kazunari
Flares are intense explosions on the solar and stellar surfaces, and solar flares are sometimes accompanied by filament or prominence eruptions. Recently, a large filament eruption associated with a superflare on a solar-type star EK Dra was discover
Externí odkaz:
http://arxiv.org/abs/2401.04279
Autor:
Namekata, Kosuke, Airapetian, Vladimir S., Petit, Pascal, Maehara, Hiroyuki, Ikuta, Kai, Inoue, Shun, Notsu, Yuta, Paudel, Rishi R., Arzoumanian, Zaven, Avramova-Boncheva, Antoaneta A., Gendreau, Keith, Jeffers, Sandra V., Marsden, Stephen, Morin, Julien, Neiner, Coralie, Vidotto, Aline A., Shibata, Kazunari
Young solar-type stars frequently produce superflares, serving as a unique window into the young Sun-Earth environments. Large solar flares are closely linked to coronal mass ejections (CMEs) associated with filament/prominence eruptions, but its obs
Externí odkaz:
http://arxiv.org/abs/2311.07380
Autor:
Notsu, Yuta, Kowalski, Adam F., Maehara, Hiroyuki, Namekata, Kosuke, Hamaguchi, Kenji, Enoto, Teruaki, Tristan, Isaiah I., Hawley, Suzanne L., Davenport, James R. A., Honda, Satoshi, Ikuta, Kai, Inoue, Shun, Namizaki, Keiichi, Nogami, Daisaku, Shibata, Kazunari
We conducted the time-resolved simultaneous optical spectroscopic and photometric observations of mid M dwarf flare stars YZ CMi, EV Lac, and AD Leo. Spectroscopic observations were obtained using Apache Point Observatory 3.5m and Small \& Moderate A
Externí odkaz:
http://arxiv.org/abs/2310.02450
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 $0.463^{+0.082}
Externí odkaz:
http://arxiv.org/abs/2304.14703
Autor:
Ikuta, Kai, Namekata, Kosuke, Notsu, Yuta, Maehara, Hiroyuki, Okamoto, Soshi, Honda, Satoshi, Nogami, Daisaku, Shibata, Kazunari
Starspots and stellar flares are indicators of stellar magnetic activity.The magnetic energy stored around spots is thought to be the origin of flares, but the connection is not completely understood. To investigate the relation between spot location
Externí odkaz:
http://arxiv.org/abs/2302.09249
Autor:
Hirano, Teruyuki, Dai, Fei, Livingston, John H., Kasagi, Yui, Narita, Norio, Ishikawa, Hiroyuki Tako, Grziwa, Sascha, Lam, Kristine W. F., Miyakawa, Kohei, Serrano, Luisa M., Matsumoto, Yuji, Kokubo, Eiichiro, Kimura, Tadahiro, Ikoma, Masahiro, Winn, Joshua N., Wisniewski, John P., Harakawa, Hiroki, Teng, Huan-Yu, Cochran, William D., Fukui, Akihiko, Gandolfi, Davide, Guenther, Eike W., Hori, Yasunori, Ikuta, Kai, Kawauchi, Kiyoe, Knudstrup, Emil, Korth, Judith, Kotani, Takayuki, Krishnamurthy, Vigneshwaran, Kudo, Tomoyuki, Kurokawa, Takashi, Kuzuhara, Masayuki, Luque, Rafael, Mori, Mayuko, Nishikawa, Jun, Omiya, Masashi, Orell-Miquel, Jaume, Palle, Enric, Persson, Carina M., Redfield, Seth, Serabyn, Eugene, Smith, Alexis M. S., Takahashi, Aoi, Takarada, Takuya, Ueda, Akitoshi, Van Eylen, Vincent, Vievard, Sebastien, Tamura, Motohide, Sato, Bun'ei
We report on the discovery of an Earth-sized transiting planet ($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:
Ikuta, Kai
甲第23006号
理博第4683号
新制||理||1672(附属図書館)
学位規則第4条第1項該当
Doctor of Science
Kyoto University
DFAM
理博第4683号
新制||理||1672(附属図書館)
学位規則第4条第1項該当
Doctor of Science
Kyoto University
DFAM
Externí odkaz:
http://hdl.handle.net/2433/263467