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Author Brahm, R.; Ulmer-Moll, S.; Hobson, M.J.; Jordan, A.; Henning, T.; Trifonov, T.; Jones, M.I.; Schlecker, M.; Espinoza, N.; Rojas, F.I.; Torres, P.; Sarkis, P.; Tala, M.; Eberhardt, J.; Kossakowski, D.; Munoz, D.J.; Hartman, J.D.; Boyle, G.; Suc, V.; Bouchy, F.; Deline, A.; Chaverot, G.; Grieves, N.; Lendl, M.; Suarez, O.; Guillot, T.; Triaud, A.H.M.J.; Crouzet, N.; Dransfield, G.; Cloutier, R.; Barkaoui, K.; Schwarz, R.P.; Stockdale, C.; Harris, M.; Mireles, I.; Evans, P.; Mann, A.W.; Ziegler, C.; Dragomir, D.; Villanueva, S.; Mordasini, C.; Ricker, G.; Vanderspek, R.; Latham, D.W.; Seager, S.; Winn, J.N.; Jenkins, J.M.; Vezie, M.; Youngblood, A.; Daylan, T.; Collins, .KA.; Caldwell, D.A.; Ciardi, D.R.; Palle, E.; Murgas, F.
Title (up) Three Long-period Transiting Giant Planets from TESS Type
Year 2023 Publication Astronomical Journal Abbreviated Journal Astron. J.
Volume 165 Issue 6 Pages 227
Keywords LIMB-DARKENING COEFFICIENTS; WARM-JUPITER; HOT JUPITER; STELLAR TRACKS; MESA ISOCHRONES; K KEPLER; MASS; MIGRATION; MODELS; EVOLUTION
Abstract We report the discovery and orbital characterization of three new transiting warm giant planets. These systems were initially identified as presenting single-transit events in the light curves generated from the full-frame images of the Transiting Exoplanet Survey Satellite. Follow-up radial velocity measurements and additional light curves were used to determine the orbital periods and confirm the planetary nature of the candidates. The planets orbit slightly metal-rich late F- and early G-type stars. We find that TOI 4406b has a mass of M ( P ) = 0.30 +/- 0.04 M (J), a radius of R ( P ) = 1.00 +/- 0.02 R (J), and a low-eccentricity orbit (e = 0.15 +/- 0.05) with a period of P = 30.08364 +/- 0.00005 days. TOI 2338b has a mass of M ( P ) = 5.98 +/- 0.20 M (J), a radius of R ( P ) = 1.00 +/- 0.01 R (J), and a highly eccentric orbit (e = 0.676 +/- 0.002) with a period of P = 22.65398 +/- 0.00002 days. Finally, TOI 2589b has a mass of M ( P ) = 3.50 +/- 0.10 M (J), a radius of R ( P ) = 1.08 +/- 0.03 R (J), and an eccentric orbit (e = 0.522 +/- 0.006) with a period of P = 61.6277 +/- 0.0002 days. TOI 4406b and TOI 2338b are enriched in metals compared to their host stars, while the structure of TOI 2589b is consistent with having similar metal enrichment to its host star.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0004-6256 ISBN Medium
Area Expedition Conference
Notes WOS:000992608400001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1827
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Author Psaridi, A.; Bouchy, F.; Lendl, M.; Grieves, N.; Stassun, K.G.; Carmichael, T.; Gill, S.; Rojas, P.A.P.; Gan, T.J.; Shporer, A.; Bieryla, A.; Brahm, R.; Christiansen, J.L.; Crossfield, I.J.M.; Galland, F.; Hooton, M.J.; Jenkins, J.M.; Jenkins, J.S.; Latham, D.W.; Lund, M.B.; Rodriguez, J.E.; Ting, E.B.; Udry, S.; Ulmer-Moll, S.; Wittenmyer, R.A.; Zhang, Y.Z.; Zhou, G.; Addison, B.; Cointepas, M.; Collins, K.A.; Collins, K.I.; Deline, A.; Dressing, C.D.; Evans, P.; Giacalone, S.; Heitzmann, A.; Mireles, I.; Mounzer, D.; Otegi, J.; Radford, D.J.; Rudat, A.; Schlieder, J.E.; Schwarz, R.P.; Srdoc, G.; Stockdale, C.; Suarez, O.; Wright, D.J.; Zhao, Y.A.
Title (up) Three new brown dwarfs and a massive hot Jupiter revealed by TESS around early-type stars Type
Year 2022 Publication Astronomy & Astrophysics Abbreviated Journal Astron. Astrophys.
Volume 664 Issue Pages A94
Keywords brown dwarfs; planetary systems; techniques: photometric; techniques: radial velocities; stars: early-type; binaries: eclipsing
Abstract ontext. The detection and characterization of exoplanets and brown dwarfs around massive AF-type stars is essential to investigate and constrain the impact of stellar mass on planet properties. However, such targets are still poorly explored in radial velocity (RV) surveys because they only feature a small number of stellar lines and those are usually broadened and blended by stellar rotation as well as stellar jitter. As a result, the available information about the formation and evolution of planets and brown dwarfs around hot stars is limited.

Aims. We aim to increase the sample and precisely measure the masses and eccentricities of giant planets and brown dwarfs transiting early-type stars detected by the Transiting Exoplanet Survey Satellite (TESS).

Methods. We followed bright (V < 12 mag) stars with T-eff > 6200 K that host giant companions (R > 7R(circle plus)) using ground-based photometric observations as well as high precision radial velocity measurements from the CORALIE, CHIRON, TRES, FEROS, and MINERVA-Australis spectrographs.

Results. In the context of the search for exoplanets and brown dwarfs around early-type stars, we present the discovery of three brown dwarf companions, TOI-629b, TOI-1982b, and TOI-2543b, and one massive planet, TOI-1107b. From the joint analysis of TESS and ground-based photometry in combination with high precision radial velocity measurements, we find the brown dwarfs have masses between 66 and 68 M-Jup, periods between 7.54 and 17.17 days, and radii between 0.95 and 1.11 R-Jup. The hot Jupiter TOI-1107b has an orbital period of 4.08 days, a radius of 1.30 R-Jup, and a mass of 3.35 M-Jup. As a by-product of this program, we identified four low-mass eclipsing components (TOI-288b, TOI-446b, TOI-478b, and TOI-764b).

Conclusions. Both TOI-1107b and TOI-1982b present an anomalously inflated radius with respect to the age of these systems. TOI-629 is among the hottest stars with a known transiting brown dwarf. TOI-629b and T01-1982b are among the most eccentric brown dwarfs. The massive planet and the three brown dwarfs add to the growing population of well-characterized giant planets and brown dwarfs transiting AF-type stars and they reduce the apparent paucity.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0004-6361 ISBN Medium
Area Expedition Conference
Notes WOS:000840123200001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1640
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