TOI-150b and TOI-163b: two transiting hot Jupiters, one eccentric and one inflated, revealed by TESS near and at the edge of the JWST CVZ
Henning, Thomas; Kürster, Martin; Jordán, Andrés; Espinoza, Néstor; Kossakowski, Diana; Brahm, Rafael; Howell, Steve B.; Crossfield, Ian J. M.; Schlecker, Martin; Collins, Karen A.; Seager, Sara; Winn, Joshua N.; Barkaoui, Khalid; Shporer, Avi; Collins, Kevin I.; Ciardi, David R.; Udry, Stéphane; Gillon, Michaël; Evans, Phil; Stockdale, Chris; Jensen, Eric L. N.; Pozuelos, Francisco J.; Matthews, Elisabeth; Jehin, Emmanuël; Relles, Howard M.; Schlieder, Joshua; Bouchy, François; Nielsen, Louise D.; Villasenor, Jesus Noel; Charbonneau, David; Pepe, Francesco; Horch, Elliott P.; Sarkis, Paula; Ricker, George; Dynes, Scott; Yu, Liang; Rose, Mark E.; Smith, Jeffrey C.; Lovis, Christophe; Gonzales, Erica; Matson, Rachel; Jenkins, Jon; Ségransan, Damien; Li, Jie; Turner, Oliver; Rojas, Felipe; Suc, Vincent; Marmier, Maxime; Bhatti, Waqas; Osip, David; Csubry, Zoltan; Bakos, Gaspar; Morgan, Ed; Jaffe, Tess
Germany, Chile, Belgium, Morocco, United States, Switzerland, Australia
Abstract
We present the discovery of TYC9191-519-1b (TOI-150b, TIC 271893367) and HD271181b (TOI-163b, TIC 179317684), two hot Jupiters initially detected using 30-min cadence Transiting Exoplanet Survey Satellite (TESS) photometry from Sector 1 and thoroughly characterized through follow-up photometry (CHAT, Hazelwood, LCO/CTIO, El Sauce, TRAPPIST-S), high-resolution spectroscopy (FEROS, CORALIE), and speckle imaging (Gemini/DSSI), confirming the planetary nature of the two signals. A simultaneous joint fit of photometry and radial velocity using a new fitting package JULIET reveals that TOI-150b is a 1.254± 0.016 {R}_ {J}, massive (2.61^{+0.19}_{-0.12} {M}_ {J}) hot Jupiter in a 5.857-d orbit, while TOI-163b is an inflated (R_ {P} = 1.478^{+0.022}_{-0.029} R_ {J}, M_ {P} = 1.219± 0.11 {M}_ {J}) hot Jupiter on a P = 4.231-d orbit; both planets orbit F-type stars. A particularly interesting result is that TOI-150b shows an eccentric orbit (e=0.262^{+0.045}_{-0.037}), which is quite uncommon among hot Jupiters. We estimate that this is consistent, however, with the circularization time-scale, which is slightly larger than the age of the system. These two hot Jupiters are both prime candidates for further characterization - in particular, both are excellent candidates for determining spin-orbit alignments via the Rossiter-McLaughlin (RM) effect and for characterizing atmospheric thermal structures using secondary eclipse observations considering they are both located closely to the James Webb Space Telescope (JWST) Continuous Viewing Zone (CVZ).