Zobrazeno 1 - 10
of 3 987
pro vyhledávání: '"A, Kuzuhara"'
Autor:
Kawashima, Yui, Kawahara, Hajime, Kasagi, Yui, Ishikawa, Hiroyuki Tako, Masuda, Kento, Kotani, Takayuki, Kudo, Tamoyuki, Hirano, Teruyuki, Kuzuhara, Masayuki, Nugroho, Stevanus K, Livingston, John, Harakawa, Hiroki, Nishikawa, Jun, Omiya, Masashi, Takarada, Takuya, Tamura, Motohide, Ueda, Akitoshi
Brown dwarfs provide a unique opportunity to study atmospheres and their physical and chemical processes with high precision, especially in temperature ranges relevant to exoplanets. In this study, we performed high-resolution ($R \sim 70,000$) spect
Externí odkaz:
http://arxiv.org/abs/2410.11561
Design, scientific goals, and performance of the SCExAO survey for planets around accelerating stars
Autor:
Morsy, Mona El, Currie, Thayne, Kuzuhara, Masayuki, Chilcote, Jeffrey, Guyon, Olivier, Tobin, Taylor L., Brandt, Timothy, An, Qier, Anh, Kyohoon, Bovie, Danielle, Deo, Vincent, Groff, Tyler, Gu, Ziying, Janson, Markus, Jovanovic, Nemanja, Li, Yiting, Lawson, Kellen, Lozi, Julien, Lucas, Miles, Marois, Christian, Murakami, Naoshi, Nielsen, Eric, Norris, Barnaby, Skaf, Nour, Tamura, Motohide, Thompson, William, Uyama, Taichi, Vievard, Sebastien
We describe the motivation, design, and early results for our 42-night, 125 star Subaru/SCExAO direct imaging survey for planets around accelerating stars. Unlike prior large surveys, ours focuses only on stars showing evidence for an astrometric acc
Externí odkaz:
http://arxiv.org/abs/2409.06773
Autor:
Lillo-Box, J., Latham, D. W., Collins, K. A., Armstrong, D. J., Gandolfi, D., Jensen, E. L. N., Castro-González, A., Balsalobre-Ruza, O., Montesinos, B., Sousa, S. G., Aceituno, J., Schwarz, R. P., Narita, N., Fukui, A., Cabrera, J., Hadjigeorghiou, A., Kuzuhara, M., Hirano, T., Fridlund, M., Hatzes, A. P., Barragán, O., Batalha, N. M.
Publikováno v:
A&A 689, L8 (2024)
The transit technique has been very efficient in detecting planet candidate signals over the past decades. The so-called statistical validation approach has become a popular way of verifying a candidate's planetary nature. However, the incomplete con
Externí odkaz:
http://arxiv.org/abs/2408.11732
Autor:
Morsy, Mona El, Currie, Thayne, Bovie, Danielle, Kuzuhara, Masayuki, Lacy, Brianna, Li, Yiting, Tobin, Taylor, Brandt, Timothy, Chilcote, Jeffrey, Guyon, Olivier, Groff, Tyler, Lozi, Julien, Vievard, Sebastien, Deo, Vincent, Skaf, Nour, Bouchy, Francois, Boisse, Isabelle, Dykes, Erica, Kasdin, N. J., Tamura, Motohide
We present follow-up SCExAO/CHARIS $H$ and $K$-band (R $\sim$ 70) high-contrast integral field spectroscopy and Keck/NIRC2 photometry of directly-imaged brown dwarf companion HD 33632 Ab and new radial-velocity data for the system from the SOPHIE spe
Externí odkaz:
http://arxiv.org/abs/2407.20322
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:
Hori, Y., Fukui, A., Hirano, T., Narita, N., de Leon, J. P., Ishikawa, H. T., Hartman, J. D., Morello, G., García, N. Abreu, Hernández, L. Álvarez, Béjar, V. J. S., Calatayud-Borras, Y., Carleo, I., Enoc, G., Esparza-Borges, E., Fukuda, I., Galán, D., Geraldía-González, S., Hayashi, Y., Ikoma, M., Ikuta, K., Isogai, K., Kagetani, T., Kawai, Y., Kawauchi, K., Kimura, T., Kodama, T., Korth, J., Kusakabe, N., Laza-Ramos, A., Livingston, J. H., Luque, R., Miyakawa, K., Mori, M., Torres, S. Muñoz, Murgas, F., Orell-Miquel, J., Palle, E., Parviainen, H., Peláez-Torres, A., Puig-Subirá, M., Sánchez-Benavente, M., Sosa-Guillén, P., Stangret, M., Terada, Y., Watanabe, N., Bakos, G. Á., Barkaoui, K., Beichman, C., Benkhaldoun, Z., Boyle, A. W., Ciardi, D. R., Clark, C. A., Collins, K. A., Collins, K. I., Conti, D. M., Crossfield, I. J. M., Everett, M. E., Furlan, E., Ghachoui, M., Gillon, M., Gonzales, E. J., Higuera, J., Horne, K., Howell, S. B., Jehin, E., Lester, K. V., Lund, M. B., Matson, R., Matthews, E. C., Pozuelos, F. J., Safonov, B. S., Schlieder, J. E., Schwarz, R. P., Sefako, R., Srdoc, G., Strakhov, I. A., Waalkes, W. C., Ziegler, C., Charbonneau, D., Essack, Z., Timmermans, M., Guerrero, N. M., Harakawa, H., Hedges, C., Ishizuka, M., Jenkins, J. M., Konishi, M., Kotani, T., Kudo, T., Kurokawa, T., Kuzuhara, M., Nishikawa, J., Omiya, M., Ricker, G. R., Seager, S., Serizawa, T., Striegel, S., Tamura, M., Ueda, A., Vanderspek, R., Vievard, S., Winn, J. N.
Sub-Neptunes with $2-3R_\oplus$ are intermediate in size between rocky planets and Neptune-sized planets. The orbital properties and bulk compositions of transiting sub-Neptunes provide clues to the formation and evolution of close-in small planets.
Externí odkaz:
http://arxiv.org/abs/2405.12637
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:
Tobin, Taylor L., Currie, Thayne, Li, Yiting, Chilcote, Jeffrey, Brandt, Timothy D., Lacy, Brianna, Kuzuhara, Masayuki, Vincent, Maria, Morsy, Mona El, Deo, Vincent, Williams, Jonathan P., Guyon, Olivier, Lozi, Julien, Vievard, Sebastien, Skaf, Nour, Ahn, Kyohoon, Groff, Tyler, Kasdin, N. Jeremy, Uyama, Taichi, Tamura, Motohide, Gibbs, Aidan, Lewis, Briley L., Bowens-Rubin, Rachel, Salama, Maïssa, An, Qier, Chen, Minghan
Publikováno v:
2024, AJ, 167, 205
We present the direct-imaging discovery of a substellar companion (a massive planet or low-mass brown dwarf) to the young, $\gamma$ Doradus-type variable star, HIP 39017 (HD 65526). The companion's SCExAO/CHARIS JHK ($1.1-2.4\mu$m) spectrum and Keck/
Externí odkaz:
http://arxiv.org/abs/2403.04000
Autor:
Petrus, Simon, Whiteford, Niall, Patapis, Polychronis, Biller, Beth A., Skemer, Andrew, Hinkley, Sasha, Suárez, Genaro, Lueber, Anna, Palma-Bifani, Paulina, Stone, Jordan M., Vos, Johanna M., Morley, Caroline V., Tremblin, Pascal, Charnay, Benjamin, Helling, Christiane, Miles, Brittany E., Carter, Aarynn L., Wang, Jason J., Janson, Markus, Gonzales, Eileen C., Sutlieff, Ben, Hoch, Kielan K. W., Bonnefoy, Mickaël, Chauvin, Gaël, Absil, Olivier, Balmer, William O., Boccaletti, Anthony, Bonavita, Mariangela, Booth, Mark, Bowler, Brendan P., Briesemeister, Zackery W., Bryan, Marta L., Calissendorff, Per, Cantalloube, Faustine, Chen, Christine H., Choquet, Elodie, Christiaens, Valentin, Cugno, Gabriele, Currie, Thayne, Danielski, Camilla, De Furio, Matthew, Dupuy, Trent J., Factor, Samuel M., Faherty, Jacqueline K., Fitzgerald, Michael P., Fortney, Jonathan J., Franson, Kyle, Girard, Julien H., Grady, Carol A., Henning, Thomas, Hines, Dean C., Hood, Callie E., Howe, Alex R., Kalas, Paul, Kammerer, Jens, Kennedy, Grant M., Kenworthy, Matthew A., Kervella, Pierre, Kim, Minjae, Kitzmann, Daniel, Kraus, Adam L., Kuzuhara, Masayuki, Lagage, Pierre-Olivier, Lagrange, Anne-Marie, Lawson, Kellen, Lazzoni, Cecilia, Leisenring, Jarron M., Lew, Ben W. P., Liu, Michael C., Liu, Pengyu, Llop-Sayson, Jorge, Lloyd, James P., Macintosh, Bruce, Mâlin, Mathilde, Manjavacas, Elena, Marino, Sebastián, Marley, Mark S., Marois, Christian, Martinez, Raquel A., Matthews, Elisabeth C., Matthews, Brenda C., Mawet, Dimitri, Mazoyer, Johan, McElwain, Michael W., Metchev, Stanimir, Meyer, Michael R., Millar-Blanchaer, Maxwell A., Mollière, Paul, Moran, Sarah E., Mukherjee, Sagnick, Pantin, Eric, Perrin, Marshall D., Pueyo, Laurent, Quanz, Sascha P., Quirrenbach, Andreas, Ray, Shrishmoy, Rebollido, Isabel, Redai, Jea Adams, Ren, Bin B., Rickman, Emily, Sallum, Steph, Samland, Matthias, Sargent, Benjamin, Schlieder, Joshua E., Stapelfeldt, Karl R., Tamura, Motohide, Tan, Xianyu, Theissen, Christopher A., Uyama, Taichi, Vasist, Malavika, Vigan, Arthur, Wagner, Kevin, Ward-Duong, Kimberly, Wolff, Schuyler G., Worthen, Kadin, Wyatt, Mark C., Ygouf, Marie, Zurlo, Alice, Zhang, Xi, Zhang, Keming, Zhan, Zhoujian, Zhou, Yifan
The unprecedented medium-resolution (R~1500-3500) near- and mid-infrared (1-18um) spectrum provided by JWST for the young (140+/-20Myr) low-mass (12-20MJup) L-T transition (L7) companion VHS1256b gives access to a catalogue of molecular absorptions.
Externí odkaz:
http://arxiv.org/abs/2312.03852
Autor:
Xiao, Guang-Yao, Teng, Huan-Yu, Zhou, Jianzhao, Sato, Bun'ei, Liu, Yu-Juan, Bi, Shaolan, Takarada, Takuya, Kuzuhara, Masayuki, Hon, Marc, Wang, Liang, Omiya, Masashi, Harakawa, Hiroki, Zhao, Fei, Zhao, Gang, Kambe, Eiji, Izumiura, Hideyuki, Ando, Hiroyasu, Noguchi, Kunio, Wang, Wei, Zhai, Meng, Song, Nan, Yang, Chengqun, Li, Tanda, Brandt, Timothy D., Yoshida, Michitoshi, Itoh, Yoichi, Kokubo, Eiichiro
We present the discoveries of two giant planets orbiting the red giant branch (RGB) star HD 112570 and the red clump (RC) star HD 154391, based on the radial velocity (RV) measurements from Xinglong station and Okayama Astrophysical Observatory (OAO)
Externí odkaz:
http://arxiv.org/abs/2312.01388