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TOI-1842b: A Transiting Warm Saturn Undergoing Reinflation around an Evolving Subgiant
Wittenmyer, Robert
Clark, Jake
Trifonov, Trifon
Addison, Brett
Wright, Duncan
Stassun, Keivan
Horner, Jonathan
Lowson, Nataliea
Kielkopf, John
Kane, Stephen
Plavchan, Peter
Shporer, Avi
Zhang, Hui
Bowler, Brendan
Mengel, Matthew
Okumura, Jack
Johnson, Marshall
Harbeck, Daniel
Tronsgaard, René
Buchhave, Lars
Collins, Karen
Collins, Kevin
Gan, Tianjun
Jensen, Eric
Howell, Steve
Furlan, E.
Gnilka, Crystal
Lester, Kathryn
Matson, Rachel
Scott, Nicholas
Ricker, George
Vanderspek, Roland
Latham, David
Seager, S.
Winn, Joshua
Jenkins, Jon
Rudat, Alexander
Quintana, Elisa
Rodriguez, David
Caldwell, Douglas
Quinn, Samuel
Essack, Zahra
Bouma, Luke
The Astronomical Journal
2022
The imminent launch of space telescopes designed to probe the atmospheres of exoplanets has prompted new efforts to prioritize the thousands of transiting planet candidates for follow-up characterization. We report the detection and confirmation of TOI-1842b, a warm Saturn identified by TESS and confirmed with ground-based observations from Minerva-Australis, NRES, and the Las Cumbres Observatory Global Telescope. This planet has a radius of R J, a mass of M J, an orbital period of days, and an extremely low density (? = 0.252 0.091 g cm-3). TOI-1842b has among the best known combinations of large atmospheric scale height (893 km) and host-star brightness (J = 8.747 mag), making it an attractive target for atmospheric characterization. As the host star is beginning to evolve off the main sequence, TOI-1842b presents an excellent opportunity to test models of gas giant reinflation. The primary transit duration of only 4.3 hr also makes TOI-1842b an easily-schedulable target for further ground-based atmospheric characterization. © 2022. The American Astronomical Society. All rights reserved.
Exoplanet detection methods
Transit photometry
Radial velocity
Extrasolar gaseous giant planets
Ciencias físicas