TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf

Fukui, A.; Kimura, T.; Hirano, T.; Narita, N.; Kodama, T.; Hori, Y.; Ikoma, M.; Pallé, E.; Murgas, F.; Parviainen, H.; Kawauchi, K.; Mori, M.; Esparza-Borges, E.; Bieryla, A.; Irwin, J.; Safonov, B.S.; Stassun, K.G.; Alvarez-Hernandez, L.; Béjar Víctor, J.S.; Casasayas-Barris, N.; Chen, G.; Crouzet, N.; de Leon, J.P.; Isogai, K.; Kagetani, T.; Klagyivik, P.; Korth, J.; Kurita, S.; Kusakabe, N.; Livingston, J.; Luque, R.; Madrigal-Aguado, A.; Morello, G.; Nishiumi, T.; Orell-Miquel, J.; Oshagh, M.; Sánchez-Benavente, M.; Stangret, M.; Terada, Y.; Watanabe, N.; Zou, Y.; Tamura, M.; Kurokawa, T.; Kuzuhara, M.; Nishikawa, J.; Omiya, M.; Vievard, S.; Ueda, A.; Latham, D.W.; Quinn, S.N.; Strakhov, I.S.; Belinski, A.A.; Jenkins, J.M.; Ricker, G.R.; Seager, S.; Vanderspek, R.; Winn, J.N.; Charbonneau, D.; Ciardi, D.R.; Collins, K.A.; Doty, J.P.; Bachelet, E.; Harbeck, D.

Авторы: Fukui Akihiko, Kimura Tadahiro, Hirano Teruyuki, Narita Norio, Kodama Takanori, Hori Yasunori, Ikoma Masahiro, Pallé Enric, Murgas Felipe, Parviainen Hannu, Kawauchi Kiyoe, Mori Mayuko, Esparza-Borges Emma, Bieryla Allyson, Irwin Jonathan, Safonov Boris S., Stassun Keivan G., Alvarez-Hernandez Leticia, Béjar Víctor J.S., Casasayas-Barris Núria, Chen Guo, Crouzet Nicolas, de Leon Jerome P., Isogai Keisuke, Kagetani Taiki, Klagyivik Peter, Korth Judith, Kurita Seiya, Kusakabe Nobuhiko, Livingston John, Luque Rafael, Madrigal-Aguado Alberto, Morello Giuseppe, Nishiumi Taku, Orell-Miquel Jaume, Oshagh Mahmoudreza, Sánchez-Benavente Manuel, Stangret Monika, Terada Yuka, Watanabe Noriharu, Zou Yujie, Tamura Motohide, Kurokawa Takashi, Kuzuhara Masayuki, Nishikawa Jun, Omiya Masashi, Vievard Sébastien, Ueda Akitoshi, Latham David W., Quinn Samuel N., Strakhov Ivan S., Belinski Alexandr A., Jenkins Jon M., Ricker George R., Seager Sara, Vanderspek Roland, Winn Joshua N., Charbonneau David, Ciardi David R., Collins Karen A., Doty John P., Bachelet Etienne, Harbeck Daniel
Журнал: Publications of the Astronomical Society of Japan
Том: 74
Номер: 1
Год издания: 2022
Издательство: Astronomical Society of Japan
Местоположение издательства: Japan
Первая страница: L1
Последняя страница: L8
DOI: 10.1093/pasj/psab106
Аннотация: We report the discovery of TOI-2285b, a sub-Neptune-sized planet transiting a nearby (42 pc) M dwarf with a period of 27.3 d. We identified the transit signal from the Transiting Exoplanet Survey Satellite photometric data, which we confirmed with ground-based photometric observations using the multiband imagers MuSCAT2 and MuSCAT3. Combining these data with other follow-up observations including high-resolution spectroscopy with the Tillinghast Reflector Echelle Spectrograph, high-resolution imaging with the SPeckle Polarimeter, and radial velocity (RV) measurements with the InfraRed Doppler instrument, we find that the planet has a radius of 1.74±0.08R⊕, a mass of <19.5M⊕ (95% c.l.), and an insolation flux of 1.54 ± 0.14 times that of the Earth. Although the planet resides just outside the habitable zone for a rocky planet, if the planet harbors an H2O layer under a hydrogen-rich atmosphere, then liquid water could exist on the surface of the H2O layer depending on the planetary mass and water mass fraction. The bright host star in the near-infrared (Ks = 9.0) makes this planet an excellent target for further RV and atmospheric observations to improve our understanding of the composition, formation, and habitability of sub-Neptune-sized planets.
Добавил в систему: Сафонов Борис Сергеевич

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TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarfстатья