Three short-period Jupiters from TESS: HIP 65Ab, TOI-157b, and TOI-169b

Nielsen, L. D. and Brahm, R. and Bouchy, F. and Espinoza, N. and Turner, O. and Rappaport, S. and Pearce, L. and Ricker, G. and Vanderspek, R. and Latham, D. W. and Seager, S. and Winn, J. N. and Jenkins, J. M. and Acton, J. S. and Bakos, G. and Barclay, T. and Barkaoui, K. and Bhatti, W. and Briceno, C. and Bryant, E. M. and Burleigh, M. R. and Ciardi, D. R. and Collins, K. A. and Collins, K. I. and Cooke, B. F. and Csubry, Z. and dos Santos, L. A. and Eigmuller, Ph. and Fausnaugh, M. M. and Gan, T. and Gillon, M. and Goad, M. R. and Guerrero, N. and Hagelberg, J. and Hart, R. and Henning, T. and Huang, C. X. ORCID: and Jehin, E. and Jenkins, J. S. and Jordan, A. and Kielkopf, J. F. and Kossakowski, D. and Lavie, B. and Law, N. and Lendl, M. and de Leon, J. P. and Lovis, C. and Mann, A. W. and Marmier, M. and McCormac, J. and Mori, M. and Moyano, M. and Narita, N. and Osip, D. and Otegi, J. F. and Pepe, F. and Pozuelos, F. J. and Raynard, L. and Relles, H. M. and Sarkis, P. and Segransan, D. and Seidel, J. V. and Shporer, A. and Stalport, M. and Stockdale, C. and Suc, V. and Tamura, M. and Tan, T. G. and Tilbrook, R. H. and Ting, E. B. and Trifonov, T. and Udry, S. and Vanderburg, A. and Wheatley, P. J. and Wingham, G. and Zhan, Z. and Ziegler, C. (2020) Three short-period Jupiters from TESS: HIP 65Ab, TOI-157b, and TOI-169b. Astronomy and Astrophysics, 639:A76. pp. 1-17. ISSN 0004-6361

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We report the confirmation and mass determination of three hot Jupiters discovered by the Transiting Exoplanet Survey Satellite (TESS) mission: HIP 65Ab (TOI-129, TIC-201248411) is an ultra-short-period Jupiter orbiting a bright (V = 11.1 mag) K4-dwarf every 0.98 days. It is a massive 3.213 ± 0.078 MJ planet in a grazing transit configuration with an impact parameter of b = 1.17-0.08+0.10. As a result the radius is poorly constrained, 2.03-0.49+0.61RJ. The planet's distance to its host star is less than twice the separation at which it would be destroyed by Roche lobe overflow. It is expected to spiral into HIP 65A on a timescale ranging from 80 Myr to a few gigayears, assuming a reduced tidal dissipation quality factor of Qs′ = 107 - 109. We performed a full phase-curve analysis of the TESS data and detected both illumination- and ellipsoidal variations as well as Doppler boosting. HIP 65A is part of a binary stellar system, with HIP 65B separated by 269 AU (3.95 arcsec on sky). TOI-157b (TIC 140691463) is a typical hot Jupiter with a mass of 1.18 ± 0.13 MJ and a radius of 1.29 ± 0.02 RJ. It has a period of 2.08 days, which corresponds to a separation of just 0.03 AU. This makes TOI-157 an interesting system, as the host star is an evolved G9 sub-giant star (V = 12.7). TOI-169b (TIC 183120439) is a bloated Jupiter orbiting a V = 12.4 G-type star. It has a mass of 0.79 ±0.06 MJ and a radius of 1.09-0.05+0.08RJ. Despite having the longest orbital period (P = 2.26 days) of the three planets, TOI-169b receives the most irradiation and is situated on the edge of the Neptune desert. All three host stars are metal rich with [Fe / H] ranging from 0.18 to0.24.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Date Deposited: 04 Apr 2022 02:13
Last Modified: 27 May 2022 00:53
Uncontrolled Keywords: Planets and satellites: detection; Planets and satellites: individual: HIP 65A; Planets and satellites: individual: TOI-129; Planets and satellites: individual: TOI-157; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
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