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. Issue 1 (17th September 2019)

• Record Type: Journal Article
• Authors: Kossakowski, Diana; Espinoza, Néstor; Brahm, Rafael; Jordán, Andrés; Henning, Thomas; Rojas, Felipe; Kürster, Martin; Sarkis, Paula; Schlecker, Martin; Pozuelos, Francisco J; Barkaoui, Khalid; Jehin, Emmanuël; Gillon, Michaël; Matthews, Elisabeth; Horch, Elliott P; Ciardi, David R; Crossfield, Ian J M; Gonzales, Erica; Howell, Steve B; Matson, Rachel; Schlieder, Joshua; Jenkins, Jon; Ricker, George; Seager, Sara; Winn, Joshua N; Li, Jie; Rose, Mark E; Smith, Jeffrey C; Dynes, Scott; Morgan, Ed; Villasenor, Jesus Noel; Charbonneau, David; Jaffe, Tess; Yu, Liang; Bakos, Gaspar; Bhatti, Waqas; Bouchy, François; Collins, Karen A; Collins, Kevin I; Csubry, Zoltan; Evans, Phil; Jensen, Eric L N; Lovis, Christophe; Marmier, Maxime; Nielsen, Louise D; Osip, David; Pepe, Francesco; Relles, Howard M; Ségransan, Damien; Shporer, Avi; Stockdale, Chris; Suc, Vincent; Turner, Oliver; Udry, Stéphane;
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 490:Issue 1(2019)
• Page Start: 1094
• Page End: 1110
• Publication Date: 2019-09-17
• Subjects: techniques: photometric -- planets and satellites: detection -- stars: individual: HD271181 -- stars: individual: TIC 179317684 -- stars: individual: TIC 271893367 -- stars: individual: TYC9191-519-1; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stz2433
• Languages: English
• ISSNs: 0035-8711

Abstract

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 $1.254\pm 0.016\ \rm {R}_ \rm{J}$, massive ($2.61^{+0.19}_{-0.12}\ \rm {M}_ \rm{J}$ ) hot Jupiter in a 5.857-d orbit, while TOI-163b is an inflated ($R_ \rm{P}$ = $1.478^{+0.022}_{-0.029} \, \mathrm{ R}_ \rm{J}$, $M_ \rm{P}$ = $1.219\pm 0.11 \, \rm{M}_ \rm{J}$ ) 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).