TESS Hunt for Young and Maturing Exoplanets (THYME). VII. Membership, Rotation, and Lithium in the Young Cluster Group-X and a New Young Exoplanet

Newton, E.R.; Rampalli, R.; Kraus, A.L.; Mann, A.W.; Curtis, J.L.; Vanderburg, A.; Krolikowski, D.M.; Huber, D.; Petter, G.C.; Bieryla, A.; Tofflemire, B.M.; Thao, P.C.; Wood, M.L.; Kerr, R.; Safanov, B.S.; Strakhov, I.A.; Ciardi, D.R.; Giacalone, S.; Dressing, C.D.; Gill, H.; Savel, A.B.; Collins, K.A.; Brown, P.; Murgas, F.; Isogai, K.; Narita, N.; Palle, E.; Quinn, S.N.; Eastman, J.D.; Fűrész, G.; Shiao, B.; Daylan, T.; Caldwell, D.A.; Ricker, G.R.; Vanderspek, R.; Seager, S.; Winn, J.N.; Jenkins, J.M.; Latham, D.W.

Авторы: Newton Elisabeth R., Rampalli Rayna, Kraus Adam L., Mann Andrew W., Curtis Jason L., Vanderburg Andrew, Krolikowski Daniel M., Huber Daniel, Petter Grayson C., Bieryla Allyson, Tofflemire Benjamin M., Thao Pa Chia, Wood Mackenna L., Kerr Ronan, Safanov Boris S., Strakhov Ivan A., Ciardi David R., Giacalone Steven, Dressing Courtney D., Gill Holden, Savel Arjun B., Collins Karen A., Brown Peyton, Murgas Felipe, Isogai Keisuke, Narita Norio, Palle Enric, Quinn Samuel N., Eastman Jason D., Fűrész Gábor, Shiao Bernie, Daylan Tansu, Caldwell Douglas A., Ricker George R., Vanderspek Roland, Seager Sara, Winn Joshua N., Jenkins Jon M., Latham David W.
Журнал: Astronomical Journal
Том: 164
Номер: 3
Год издания: 2022
Издательство: American Astronomical Society
Местоположение издательства: United States
Первая страница: 115
DOI: 10.3847/1538-3881/ac8154
Аннотация: The public, all-sky surveys Gaia and TESS provide the ability to identify new young associations and determine their ages. These associations enable study of planetary evolution by providing new opportunities to discover young exoplanets. A young association was recently identified by Tang et al. and Fürnkranz et al. using astrometry from Gaia (called "Group-X" by the former). In this work, we investigate the age and membership of this association, and we validate the exoplanet TOI 2048 b, which was identified to transit a young, late G dwarf in Group-X using photometry from TESS. We first identified new candidate members of Group-X using Gaia EDR3 data. To infer the age of the association, we measured rotation periods for candidate members using TESS data. The clear color-period sequence indicates that the association is the same age as the 300 ± 50 Myr old NGC 3532. We obtained optical spectra for candidate members that show lithium absorption consistent with this young age. Further, we serendipitously identify a new, small association nearby Group-X, which we call MELANGE-2. Lastly, we statistically validate TOI 2048 b, which is a 2.1 ± 0.2 R ⊕ radius planet on a 13.8-day orbit around its 300 Myr old host star.
Добавил в систему: Страхов Иван Александрович

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TESS Hunt for Young and Maturing Exoplanets (THYME). VII. Membership, Rotation, and Lithium in the Young Cluster Group-X and a New Young Exoplanetстатья