TOI 762 A b and TIC 46432937 b: Two Giant Planets Transiting M-dwarf Stars
Abstract We present the discovery of TOI 762 A b and TIC 46432937 b, two giant planets transiting M-dwarf stars. Transits of both systems were first detected from observations by the NASA TESS mission, and the transiting objects are confirmed as planets through high-precision radial velocity observations carried out with Very Large Telescope/ESPRESSO. TOI 762 A b is a warm sub-Saturn with a mass of 0.251 ± 0.042 M J , a radius of 0.744 ± 0.017 R J , and an orbital period of 3.4717 days. It transits a mid-M-dwarf star with a mass of 0.442 ± 0.025 M ☉ and a radius of 0.4250 ± 0.0091 R ☉ . The star TOI 762 A has a resolved binary star companion, TOI 762 B, that is separated from TOI 762 A by 3.″2 (∼319 au) and has an estimated mass of 0.227 ± 0.010 M ☉ . The planet TIC 46432937 b is a warm super-Jupiter with a mass of 3.20 ± 0.11 M J and radius of 1.188 ± 0.030 R J . The planet’s orbital period is P = 1.4404 days, and it undergoes grazing transits of its early M-dwarf host star, which has a mass of 0.563 ± 0.029 M ☉ and a radius of 0.5299 ± 0.0091 R ☉ . TIC 46432937 b is one of the highest-mass planets found to date transiting an M-dwarf star. TIC 46432937 b is also a promising target for atmospheric observations, having the highest transmission spectroscopy metric or emission spectroscopy metric value of any known warm super-Jupiter (mass greater than 3.0 M J , equilibrium temperature below 1000 K).
Authors
- Jon M. Jenkins (ORCID: https://orcid.org/0000-0002-4715-9460)
- M. Gillon (ORCID: https://orcid.org/0000-0003-1462-7739)
- F. J. Pozuelos (ORCID: https://orcid.org/0000-0003-1572-7707)
- Zachory K. Berta-Thompson (ORCID: https://orcid.org/0000-0002-3321-4924)
- Emmanuël Jehin (ORCID: https://orcid.org/0000-0001-8923-488X)
- Rafael Brahm (ORCID: https://orcid.org/0000-0002-9158-7315)
- Daniel Bayliss (ORCID: https://orcid.org/0000-0001-6023-1335)
- Sebastián Zúñiga-Fernández (ORCID: https://orcid.org/0000-0002-9350-830X)
- J. D. Hartman (ORCID: https://orcid.org/0000-0001-8732-6166)
- X. Bonfıls (ORCID: https://orcid.org/0000-0001-9003-8894)
- Karen A. Collins (ORCID: https://orcid.org/0000-0001-6588-9574)
- Steve B. Howell (ORCID: https://orcid.org/0000-0002-2532-2853)
- A. H. M. J. Triaud (ORCID: https://orcid.org/0000-0002-5510-8751)
- Sara Seager (ORCID: https://orcid.org/0000-0002-6892-6948)
- Marion Cointepas
- Mathilde Timmermans (ORCID: https://orcid.org/0009-0008-2214-5039)
- David Charbonneau (ORCID: https://orcid.org/0000-0002-9003-484X)
- Elyar Sedaghati (ORCID: https://orcid.org/0000-0002-7444-5315)
- Khalid Barkaoui (ORCID: https://orcid.org/0000-0003-1464-9276)
- G. Ricker (ORCID: https://orcid.org/0000-0003-2058-6662)
- P. P. Pedersen (ORCID: https://orcid.org/0000-0002-5220-609X)
- Andrés Jordán (ORCID: https://orcid.org/0000-0002-5389-3944)
- David Rapetti (ORCID: https://orcid.org/0000-0003-2196-6675)
- M. J. Hooton (ORCID: https://orcid.org/0000-0003-0030-332X)
- William C. Waalkes (ORCID: https://orcid.org/0000-0002-8961-0352)
- Edward M. Bryant (ORCID: https://orcid.org/0000-0001-7904-4441)
- Elise Furlan (ORCID: https://orcid.org/0000-0001-9800-6248)
- G. Á. Bakos (ORCID: https://orcid.org/0000-0001-7204-6727)
- Elsa Ducrot (ORCID: https://orcid.org/0000-0002-7008-6888)
- Mélissa J. Hobson (ORCID: https://orcid.org/0000-0002-5945-7975)
- R. Vanderspek (ORCID: https://orcid.org/0000-0001-6763-6562)
- David R. Rodriguez (ORCID: https://orcid.org/0000-0003-1286-5231)
- George Dransfield
- Christopher J. Burke (ORCID: https://orcid.org/0000-0002-7754-9486)
- J. M. Almenara
- Joshua N. Winn (ORCID: https://orcid.org/0000-0002-4265-047X)
Publication Details
- Journal
- The Astronomical Journal
- Published
- 2024-10-10
- DOI
- https://doi.org/10.3847/1538-3881/ad6f07
- Citations
- 14
- Primary Topic
- Stellar, planetary, and galactic studies
- Type
- article
- Field-Weighted Citation Impact
- 4.64
Funders
- National Aeronautics and Space Administration
- Simons Foundation
- California Institute of Technology
- Space Telescope Science Institute
- European Commission
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Fonds De La Recherche Scientifique - FNRS
- Fédération Wallonie-Bruxelles
- Nuclear Safety and Security Commission
- Agencia Nacional de Investigación y Desarrollo
- Ames Research Center
- Science Mission Directorate
- NASA Headquarters
- Science and Technology Facilities Council
- European Research Council
- Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture
- Agencia Estatal de Investigación
- Astrophysics Division
- Fondo Nacional de Desarrollo Científico y Tecnológico