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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 Briceño, 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 Eigmüller, 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. and Jehin, E. and Jenkins, J. S. and Jordàn, 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 & Astrophysics, 639 . Art. No. A76. ISSN 0004-6361. doi:10.1051/0004-6361/202037941.

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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 M_J 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)^(+0.61)R_J. 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 M_J and a radius of 1.29 ± 0.02 R_J. 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 M_J and a radius of 1.09_(−0.05)^(+0.08)R_J. 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 to 0.24.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Nielsen, L. D.0000-0002-5254-2499
Brahm, R.0000-0002-9158-7315
Espinoza, N.0000-0001-9513-1449
Rappaport, S.0000-0003-3182-5569
Latham, D. W.0000-0001-9911-7388
Seager, S.0000-0002-6892-6948
Winn, J. N.0000-0002-4265-047X
Jenkins, J. M.0000-0002-4715-9460
Bakos, G.0000-0001-7204-6727
Barclay, T.0000-0001-7139-2724
Bhatti, W.0000-0002-0628-0088
Ciardi, D. R.0000-0002-5741-3047
Cooke, B. F.0000-0002-8824-9956
Gillon, M.0000-0003-1462-7739
Hagelberg, J.0000-0002-1096-1433
Huang, C. X.0000-0003-0918-7484
Jenkins, J. S.0000-0003-2733-8725
Law, N.0000-0001-9380-6457
Lendl, M.0000-0001-9699-1459
Mann, A. W.0000-0003-3654-1602
Pozuelos, F. J.0000-0003-1572-7707
Sarkis, P.0000-0001-8128-3126
Seidel, J. V.0000-0002-7990-9596
Shporer, A.0000-0002-1836-3120
Suc, V.0000-0001-7070-3842
Tamura, M.0000-0002-6510-0681
Udry, S.0000-0001-7576-6236
Vanderburg, A.0000-0001-7246-5438
Wheatley, P. J.0000-0003-1452-2240
Ziegler, C.0000-0002-0619-7639
Additional Information:© ESO 2020. Received: 12 March 2020. Accepted: 28 May 2020. We thank the Swiss National Science Foundation (SNSF) and the Geneva University for their continuous support to our planet search programmes. This work has been in particular carried out in the frame of theNational Centre for Competence in Research “PlanetS” supported by the Swiss National Science Foundation (SNSF). This publication makes use of The Data & Analysis Center for Exoplanets (DACE), which is a facility based at the University of Geneva (CH) dedicated to extrasolar planets data visualisation, exchange and analysis. DACE is a platform of the Swiss National Centre of Competence in Research (NCCR) PlanetS, federating the Swiss expertise in Exoplanet research. The DACE platform is available at This paper includes data collected by the TESS mission. Funding for the TESS mission is provided by the NASA Explorer Program. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center for the production of the SPOC data products. This work has made use of data from the European Space Agency (ESA) mission Gaia (, processed by the Gaia Data Processing and Analysis Consortium (DPAC, Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research has made use of Aladin sky atlas developed at CDS, Strasbourg Observatory, France. This work makes use of observations from the LCOGT network. This work is partly supported by JSPS KAKENHI Grant Numbers JP15H02063, JP18H01265, JP18H05439, JP18H05442, and JST PRESTO Grant Number JPMJPR1775. The IRSF project is a collaboration between Nagoya University and the South African Astronomical Observatory (SAAO) supported by the Grants-in-Aid for Scientific Research on Priority Areas (A) (Nos. 10147207 and 10 147214) and Optical & Near-Infrared Astronomy Inter-University CooperationProgram, from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan and the National Research Foundation (NRF) of South Africa. We thank Akihiko Fukui, Nobuhiko Kusakabe, Kumiko Morihana, Tetsuya Nagata, Takahiro Nagayama, Taku Nishiumi, and the staff of SAAO for their kind supports forIRSF SIRIUS observations and analyses. The research leading to these results has received funding from the ARC grant for Concerted Research Actions, financed by the Wallonia-Brussels Federation. TRAPPIST is funded by the Belgian Fund for Scientific Research (Fond National de la Recherche Scientifique, FNRS) under the grant FRFC 2.5.594.09.F, with the participation of the Swiss National Science Fundation (SNF). M.G. and E.J. are F.R.S.-FNRS Senior Research Associate. R.B. acknowledges support from FONDECYT Post-doctoral Fellowship Project 3180246, and from the Millennium Institute of Astrophysics (MAS). A.J. acknowledges support from FONDECYT project 1171208 and by the Ministry for the Economy, Development, and Tourism’s Programa Iniciativa Científica Milenio through grant IC 120009, awarded to the Millennium Institute of Astrophysics (MAS). J.S.J. acknowledges support by FONDECYT grant 1161218 and partial support from CONICYT project Basal AFB-170002. JVS and LAdS are supported by funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (project FOUR ACES; grant agreement No 724 427). L.A.P. is supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE-1746060. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Includes data collected under the NGTS project at the ESO La Silla Paranal Observatory. The NGTS facility is funded by the University of Warwick, the University of Leicester, Queen’s University Belfast, the University of Geneva, the Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR; under the “Großinvestition GI-NGTS”), the University of Cambridge and the UK Science and Technology Facilities Council (STFC; project references ST/M001962/1 and ST/S002642/1). Staff from the University of Warwick acknowledge support from STFC consolidated grant ST/P000495/1.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)UNSPECIFIED
Gaia Multilateral AgreementUNSPECIFIED
Japan Society for the Promotion of Science (JSPS)JP15H02063
Japan Society for the Promotion of Science (JSPS)JP18H01265
Japan Society for the Promotion of Science (JSPS)JP18H05439
Japan Society for the Promotion of Science (JSPS)JP18H05442
Japan Science and Technology AgencyJPMJPR1775
Ministry of Education, Culture, Sports, Science and Technology (MEXT)10147207
Ministry of Education, Culture, Sports, Science and Technology (MEXT)10147214
National Research Foundation (South Africa)UNSPECIFIED
Wallonia-Brussels FederationUNSPECIFIED
Fond National de la Recherche Scientifique (FNRS)FRFC 2.5.594.09.F
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)3180246
Millennium Institute of Astrophysics (MAS)UNSPECIFIED
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1171208
Ministerio de Economía, Fomento y TurismoIC 120009
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1161218
European Research Council (ERC)724427
NSF Graduate Research FellowshipDGE-1746060
University of WarwickUNSPECIFIED
University of LeicesterUNSPECIFIED
Queen’s University BelfastUNSPECIFIED
University of GenevaUNSPECIFIED
Deutsches Zentrum für Luft- und Raumfahrt (DLR)UNSPECIFIED
University of CambridgeUNSPECIFIED
Science and Technology Facilities Council (STFC)ST/M001962/1
Science and Technology Facilities Council (STFC)ST/S002642/1
Science and Technology Facilities Council (STFC)ST/P000495/1
Subject Keywords:planets and satellites: detection / planets and satellites: individual: TOI-129 / planets and satellites: individual: HIP 65A / planets and satellites: individual: TOI-157
Record Number:CaltechAUTHORS:20200611-113707433
Persistent URL:
Official Citation:Three short-period Jupiters from TESS - HIP 65Ab, TOI-157b, and TOI-169b L. D. Nielsen, R. Brahm, F. Bouchy, N. Espinoza, O. Turner, S. Rappaport, L. Pearce, G. Ricker, R. Vanderspek, D. W. Latham, S. Seager, J. N. Winn, J. M. Jenkins, J. S. Acton, G. Bakos, T. Barclay, K. Barkaoui, W. Bhatti, C. Briceño, E. M. Bryant, M. R. Burleigh, D. R. Ciardi, K. A. Collins, K. I. Collins, B. F. Cooke, Z. Csubry, L. A. dos Santos, Ph. Eigmüller, M. M. Fausnaugh, T. Gan, M. Gillon, M. R. Goad, N. Guerrero, J. Hagelberg, R. Hart, T. Henning, C. X. Huang, E. Jehin, J. S. Jenkins, A. Jordán, J. F. Kielkopf, D. Kossakowski, B. Lavie, N. Law, M. Lendl, J. P. de Leon, C. Lovis, A. W. Mann, M. Marmier, J. McCormac, M. Mori, M. Moyano, N. Narita, D. Osip, J. F. Otegi, F. Pepe, F. J. Pozuelos, L. Raynard, H. M. Relles, P. Sarkis, D. Ségransan, J. V. Seidel, A. Shporer, M. Stalport, C. Stockdale, V. Suc, M. Tamura, T. G. Tan, R. H. Tilbrook, E. B. Ting, T. Trifonov, S. Udry, A. Vanderburg, P. J. Wheatley, G. Wingham, Z. Zhan and C. Ziegler A&A, 639 (2020) A76 DOI:
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ID Code:103847
Deposited By: George Porter
Deposited On:12 Jun 2020 14:03
Last Modified:16 Nov 2021 18:25

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