The Discovery and Follow-up of Four Transiting Short-period Sub-Neptunes Orbiting M Dwarfs

Hori, Y.; Fukui, A.; Hirano, T.; Narita, N.; de Leon, J.P.; Ishikawa, H.T.; Hartman, J.D.; Morello, G.; García, N.A.; Hernández, L.Á.; Béjar Víctor, 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.; Murgas, F.; Orell-Miquel, J.; Palle, E.; Parviainen, H.; Peláez-Torres, A.; Puig-Subirà, M.; Sánchez-Benavente, M.; Sosa-Guillén, P.; Stangret, M.; Terada, Y.; Muñoz, T.S.; 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 Ian, 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.; Timmermans, M.; Waalkes, W.C.; Ziegler, C.; Charbonneau, D.; Essack, Z.; 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.

Авторы: Hori Yasunori, Fukui Akihiko, Hirano Teruyuki, Narita Norio, de Leon Jerome P., Ishikawa Hiroyuki Tako, Hartman Joel D., Morello Giuseppe, García Nestor Abreu, Hernández Leticia Álvarez, Béjar Víctor J.S., Calatayud-Borras Yéssica, Carleo Ilaria, Enoc Gareb, Esparza-Borges Emma, Fukuda Izuru, Galán Daniel, Geraldía-González Samuel, Hayashi Yuya, Ikoma Masahiro, Ikuta Kai, Isogai Keisuke, Kagetani Taiki, Kawai Yugo, Kawauchi Kiyoe, Kimura Tadahiro, Kodama Takanori, Korth Judith, Kusakabe Nobuhiko, Laza-Ramos Andrés, Livingston John H., Luque Rafael, Miyakawa Kohei, Mori Mayuko, Murgas Felipe, Orell-Miquel Jaume, Palle Enric, Parviainen Hannu, Peláez-Torres Alberto, Puig-Subirà Marta, Sánchez-Benavente Manuel, Sosa-Guillén Paula, Stangret Monika, Terada Yuka, Muñoz Torres Sara, Watanabe Noriharu, Bakos Gaspar Á., Barkaoui Khalid, Beichman Charles, Benkhaldoun Zouhair, Boyle Andrew W., Ciardi David R., Clark Catherine A., Collins Karen A., Collins Kevin I., Conti Dennis M., Crossfield Ian J.M., Everett Mark E., Furlan Elise, Ghachoui Mourad, Gillon Michaël, Gonzales Erica J., Higuera Jesus, Horne Keith, Howell Steve B., Jehin Emmanuël, Lester Kathryn V., Lund Michael B., Matson Rachel, Matthews Elisabeth C., Pozuelos Francisco J., Safonov Boris S., Schlieder Joshua E., Schwarz Richard P., Sefako Ramotholo, Srdoc Gregor, Strakhov Ivan A., Timmermans Mathilde, Waalkes William C., Ziegler Carl, Charbonneau David, Essack Zahra, Guerrero Natalia M., Harakawa Hiroki, Hedges Christina, Ishizuka Masato, Jenkins Jon M., Konishi Mihoko, Kotani Takayuki, Kudo Tomoyuki, Kurokawa Takashi, Kuzuhara Masayuki, Nishikawa Jun, Omiya Masashi, Ricker George R., Seager Sara, Serizawa Takuma, Striegel Stephanie, Tamura Motohide, Ueda Akitoshi, Vanderspek Roland, Vievard Sébastien, Winn Joshua N.
Журнал: Astronomical Journal
Том: 167
Номер: 6
Год издания: 2024
Издательство: American Astronomical Society
Местоположение издательства: United States
Первая страница: 289
DOI: 10.3847/1538-3881/ad4115
Аннотация: Sub-Neptunes with radii of 2–3 R ⊕ 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. In this paper, we present the discovery and follow-up of four sub-Neptunes orbiting M dwarfs (TOI-782, TOI-1448, TOI-2120, and TOI-2406), three of which were newly validated by ground-based follow-up observations and statistical analyses. TOI-782 b, TOI-1448 b, TOI-2120 b, and TOI-2406 b have radii of , , 2.120 ± 0.067 R ⊕, and and orbital periods of P = 8.02, 8.11, 5.80, and 3.08 days, respectively. Doppler monitoring with the Subaru/InfraRed Doppler instrument led to 2σ upper limits on the masses of <19.1 M ⊕, <19.5 M ⊕, <6.8 M ⊕, and <15.6 M ⊕ for TOI-782 b, TOI-1448 b, TOI-2120 b, and TOI-2406 b, respectively. The mass–radius relationship of these four sub-Neptunes testifies to the existence of volatile material in their interiors. These four sub-Neptunes, which are located above the so-called "radius valley," are likely to retain a significant atmosphere and/or an icy mantle on the core, such as a water world. We find that at least three of the four sub-Neptunes (TOI-782 b, TOI-2120 b, and TOI-2406 b), orbiting M dwarfs older than 1 Gyr, are likely to have eccentricities of e ∼ 0.2–0.3. The fact that tidal circularization of their orbits is not achieved over 1 Gyr suggests inefficient tidal dissipation in their interiors.
Добавил в систему: Страхов Иван Александрович

	ИСТИНА	Войти в систему Регистрация
	ФНКЦ РР
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ФНКЦ РР

The Discovery and Follow-up of Four Transiting Short-period Sub-Neptunes Orbiting M Dwarfsстатья

Прикрепленные файлы