Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. VI. Confirmation of a Long-period Giant Planet Discovered with a Single TESS Transit

Essack, Z.; Dragomir, D.; Dalba, P.A.; Battley, M.P.; Ciardi, D.R.; Collins, K.A.; Howell, S.B.; Jones, M.I.; Kane, S.R.; Mamajek, E.E.; Mann, C.R.; Mireles, I.; Oddo, D.; Sgro, L.A.; Stassun, K.G.; Ulmer-Moll, S.; Watkins, C.N.; Yee, S.W.; Ziegler, C.; Bieryla, A.; Apergis, I.; Barkaoui, K.; Brahm, R.; Bryant, E.M.; Esposito, T.M.; Figueira, P.; Fulton, B.J.; Gill, S.; Howard, A.W.; Isaacson, H.; Kendall, A.; Law, N.; Lund, M.B.; Mann, A.W.; Matson, R.A.; Murgas, F.; Palle, E.; Quinn, S.N.; Revol, A.; Saha, S.; Schwarz, R.P.; Sefako, R.; Shporer, A.; Strakhov, I.A.; Villanueva, S.; Ricker, G.R.; Vanderspek, R.; Latham, D.W.; Seager, S.; Winn, J.N.; Bosch-Cabot, P.; Collins, K.I.; Forés-Toribio, R.; Rodriguez, F.F.; Girardin, E.; Helm, I.J.; Lewin, P.; Muñoz, J.A.; Newman, P.; Plavchan, P.; Srdoc, G.; Stockdale, C.; Wünsche, A.; Billiani, M.; Davy, M.; Douvas, A.; Fukui, K.; Guillet, B.; Ostrem, C.; Rushton, M.; Schmidt, A.; Finardi, A.; Girard, P.; Goto, T.; de Lambilly, J.S.; Leroux, L.; Mortecrette, F.; Pickering, J.W.; Primm, M.; Ribot, M.; Teng, E.; Verveen, A.; Will, S.; Ziegler, M.

Авторы: Essack Zahra, Dragomir Diana, Dalba Paul A., Battley Matthew P., Ciardi David R., Collins Karen A., Howell Steve B., Jones Matias I., Kane Stephen R., Mamajek Eric E., Mann Christopher R., Mireles Ismael, Oddo Dominic, Sgro Lauren A., Stassun Keivan G., Ulmer-Moll Solene, Watkins Cristilyn N., Yee Samuel W., Ziegler Carl, Bieryla Allyson, Apergis Ioannis, Barkaoui Khalid, Brahm Rafael, Bryant Edward M., Esposito Thomas M., Figueira Pedro, Fulton Benjamin J., Gill Samuel, Howard Andrew W., Isaacson Howard, Kendall Alicia, Law Nicholas, Lund Michael B., Mann Andrew W., Matson Rachel A., Murgas Felipe, Palle Enric, Quinn Samuel N., Revol Alexandre, Saha Suman, Schwarz Richard P., Sefako Ramotholo, Shporer Avi, Strakhov Ivan A., Villanueva Steven, Ricker George R., Vanderspek Roland, Latham David W., Seager Sara, Winn Joshua N., Bosch-Cabot Pau, Collins Kevin I., Forés-Toribio Raquel, Rodriguez Frustagia Fabian, Girardin Eric, Helm Ian J., Lewin Pablo, Muñoz Jose A., Newman Patrick, Plavchan Peter, Srdoc Gregor, Stockdale Chris, Wünsche Anaël, Billiani Mario, Davy Martin, Douvas Alex, Fukui Keiichi, Guillet Bruno, Ostrem Cory, Rushton Michael, Schmidt Angsar, Finardi Andrea, Girard Patrice, Goto Tateki, de Lambilly Julien S., Leroux Liouba, Mortecrette Fabrice, Pickering John W., Primm Michael, Ribot Marc, Teng Ethan, Verveen Aad, Will Stefan, Ziegler Mark
Журнал: Astronomical Journal
Том: 170
Номер: 1
Год издания: 2025
Издательство: American Astronomical Society
Местоположение издательства: United States
Первая страница: 41
DOI: 10.3847/1538-3881/add88b
Аннотация: We report the discovery and confirmation of TOI-4465 b, a 1.25RJ ‑0.07RJ+0.08RJ , 5.89MJ ± 0.26MJ giant planet orbiting a G dwarf star at d ≃ 122 pc. The planet was detected as a single-transit event in data from Sector 40 of the Transiting Exoplanet Survey Satellite (TESS) mission. Radial velocity (RV) observations of TOI-4465 showed a planetary signal with an orbital period of ∼102 days and an orbital eccentricity of e = 0.24 ± 0.01. TESS reobserved TOI-4465 in Sector 53 and Sector 80 but did not detect another transit of TOI-4465 b, as the planet was not expected to transit during these observations based on the RV period. A global ground-based photometry campaign was initiated to observe another transit of TOI-4465 b after the RV period determination. The ∼12 hr long transit event was captured from multiple sites around the world and included observations from 24 citizen scientists, confirming the orbital period as ∼102 days. TOI-4465 b is a relatively dense (3.73 ± 0.53 g cm‑3), temperate (375–478 K) giant planet. Based on giant planet structure models, TOI-4465 b appears to be enriched in heavy elements at a level consistent with late-stage accretion of icy planetesimals. Additionally, we explore TOI-4465 b's potential for atmospheric characterization and obliquity measurement. Increasing the number of long-period planets by confirming single-transit events is crucial for understanding the frequency and demographics of planet populations in the outer regions of planetary systems.
Добавил в систему: Страхов Иван Александрович

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Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. VI. Confirmation of a Long-period Giant Planet Discovered with a Single TESS Transitстатья

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