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

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 MatsonJoshua 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

Research output: Contribution to journalArticle

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+001912 MJ) hot Jupiter in a 5.857-d orbit, while TOI-163b is an inflated (RP = 1.478+00022029 RJ, MP = 1.219 ± 0.11 MJ) 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+00045037), 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).

Original languageEnglish (US)
Pages (from-to)1094-1110
Number of pages17
JournalMonthly Notices of the Royal Astronomical Society
Volume490
Issue number1
DOIs
StatePublished - 2019

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Planets and satellites: detection
  • Stars: individual: HD271181
  • Stars: individual: TIC 179317684
  • Stars: individual: TIC 271893367
  • Stars: individual: TYC9191-519-1
  • Techniques: photometric

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    Kossakowski, D., Espinoza, N., Brahm, R., Jordán, A., Henning, T., Rojas, F., Kürster, M., Sarkis, P., Schlecker, M., Pozuelos, F. J., Barkaoui, K., Jehin, E., Gillon, M., Matthews, E., Horch, E. P., Ciardi, D. R., Crossfield, I. J. M., Gonzales, E., Howell, S. B., ... Udry, S. (2019). 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, 490(1), 1094-1110. https://doi.org/10.1093/mnras/stz2433