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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
Kossakowski, Diana Espinoza, Néstor Brahm, Rafael Jordán, Andrés Henning, Thomas Rojas, Felipe Kürster, Martin Sarkis, Paula Schlecker, Martin Pozuelos, Francisco J.
Kossakowski, Diana
Espinoza, Néstor
Brahm, Rafael
Jordán, Andrés
Henning, Thomas
Rojas, Felipe
Kürster, Martin
Sarkis, Paula
Schlecker, Martin
Pozuelos, Francisco J.
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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 RJ, massive (2.61+0.19−0.12 MJ) hot Jupiter in a 5.857-d orbit, while TOI-163b is an inflated (RP = 1.478+0.022−0.029RJ, MP = 1.219±0.11MJ) 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).
Description
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Date
2019-09-17
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Royal Astronomical Society
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Keywords
Techniques: photometric, Planets and satellites: detection, Stars: individual: HD271181, Stars: individual: TIC 179317684, Stars: individual: TIC 271893367, Stars: individual: TYC9191-519-1
Citation
Diana Kossakowski, Néstor Espinoza, Rafael Brahm, Andrés Jordán, Thomas Henning, Felipe Rojas, Martin Kürster, Paula Sarkis, Martin Schlecker, Francisco J Pozuelos, Khalid Barkaoui, Emmanuël Jehin, Michaël Gillon, Elisabeth Matthews, Elliott P Horch, David R Ciardi, Ian J M Crossfield, Erica Gonzales, Steve B Howell, Rachel Matson, Joshua Schlieder, Jon Jenkins, George Ricker, Sara Seager, Joshua N Winn, Jie Li, Mark E Rose, Jeffrey C Smith, Scott Dynes, Ed Morgan, Jesus Noel Villasenor, David Charbonneau, Tess Jaffe, Liang Yu, Gaspar Bakos, Waqas Bhatti, François Bouchy, Karen A Collins, Kevin I Collins, Zoltan Csubry, Phil Evans, Eric L N Jensen, Christophe Lovis, Maxime Marmier, Louise D Nielsen, David Osip, Francesco Pepe, Howard M Relles, Damien Ségransan, Avi Shporer, Chris Stockdale, Vincent Suc, Oliver Turner, Stéphane Udry, 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, Monthly Notices of the Royal Astronomical Society, Volume 490, Issue 1, November 2019, Pages 1094–1110, https://doi.org/10.1093/mnras/stz2433