The Astronomical Journal (Jan 2024)
TOI 762 A b and TIC 46432937 b: Two Giant Planets Transiting M-dwarf Stars
- Joel D. Hartman,
- Daniel Bayliss,
- Rafael Brahm,
- Edward M. Bryant,
- Andrés Jordán,
- Gáspár Á. Bakos,
- Melissa J. Hobson,
- Elyar Sedaghati,
- Xavier Bonfils,
- Marion Cointepas,
- Jose Manuel Almenara,
- Khalid Barkaoui,
- Mathilde Timmermans,
- George Dransfield,
- Elsa Ducrot,
- Sebastián Zúñiga-Fernández,
- Matthew J. Hooton,
- Peter Pihlmann Pedersen,
- Francisco J. Pozuelos,
- Amaury H. M. J. Triaud,
- Michaël Gillon,
- Emmanuel Jehin,
- William C. Waalkes,
- Zachory K. Berta-Thompson,
- Steve B. Howell,
- Elise Furlan,
- George R. Ricker,
- Roland Vanderspek,
- Sara Seager,
- Joshua N. Winn,
- Jon M. Jenkins,
- David Rapetti,
- Karen A. Collins,
- David Charbonneau,
- Christopher J. Burke,
- David R. Rodriguez
Affiliations
- Joel D. Hartman
- ORCiD
- Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544, USA ; [email protected]
- Daniel Bayliss
- ORCiD
- Department of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick , Gibbet Hill Road, Coventry, CV4 7AL, UK
- Rafael Brahm
- ORCiD
- Millennium Institute of Astrophysics (MAS) , Nuncio Monseñor Sótero Sanz 100, Providencia, Santiago, Chile; Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez , Av. Diagonal las Torres 2640, Peñalolén, Santiago, Chile; Data Observatory Foundation , Santiago, Chile
- Edward M. Bryant
- ORCiD
- Mullard Space Science Laboratory, University College London , Holmbury St Mary, Dorking, RH5 6NT, UK
- Andrés Jordán
- ORCiD
- Millennium Institute of Astrophysics (MAS) , Nuncio Monseñor Sótero Sanz 100, Providencia, Santiago, Chile; Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez , Av. Diagonal las Torres 2640, Peñalolén, Santiago, Chile; Data Observatory Foundation , Santiago, Chile
- Gáspár Á. Bakos
- ORCiD
- Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544, USA ; [email protected]
- Melissa J. Hobson
- ORCiD
- Observatoire de Genève, Département d’Astronomie, Université de Genève , Chemin Pegasi 51b, 1290 Versoix, Switzerland
- Elyar Sedaghati
- ORCiD
- European Southern Observatory (ESO) , Av. Alonso de Córdova 3107, 763 0355 Vitacura, Santiago, Chile
- Xavier Bonfils
- ORCiD
- Univ. Grenoble Alpes , CNRS, IPAG, F-38000 Grenoble, France
- Marion Cointepas
- Observatoire de Genève, Département d’Astronomie, Université de Genève , Chemin Pegasi 51b, 1290 Versoix, Switzerland; Univ. Grenoble Alpes , CNRS, IPAG, F-38000 Grenoble, France
- Jose Manuel Almenara
- ORCiD
- Observatoire de Genève, Département d’Astronomie, Université de Genève , Chemin Pegasi 51b, 1290 Versoix, Switzerland; Univ. Grenoble Alpes , CNRS, IPAG, F-38000 Grenoble, France
- Khalid Barkaoui
- ORCiD
- Astrobiology Research Unit, Université de Liège , Allée du 6 Août 19C, B-4000 Liège, Belgium; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Instituto de Astrofísica de Canarias (IAC) , Calle Vía Láctea s/n, 38200, La Laguna, Tenerife, Spain
- Mathilde Timmermans
- ORCiD
- Astrobiology Research Unit, Université de Liège , Allée du 6 Août 19C, B-4000 Liège, Belgium
- George Dransfield
- School of Physics & Astronomy, University of Birmingham , Edgbaston, Birmingham, B15 2TT, UK
- Elsa Ducrot
- ORCiD
- AIM, CEA, CNRS, Université Paris-Saclay , Université de Paris, F-91191 Gif-sur-Yvette, France
- Sebastián Zúñiga-Fernández
- ORCiD
- Astrobiology Research Unit, Université de Liège , Allée du 6 Août 19C, B-4000 Liège, Belgium
- Matthew J. Hooton
- ORCiD
- Cavendish Laboratory, University of Cambridge , JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Peter Pihlmann Pedersen
- ORCiD
- Cavendish Laboratory, University of Cambridge , JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Francisco J. Pozuelos
- ORCiD
- Instituto de Astrofísica de Andalucía (IAA-CSIC) , Glorieta de la Astronomía s/n, 18008 Granada, Spain
- Amaury H. M. J. Triaud
- ORCiD
- School of Physics & Astronomy, University of Birmingham , Edgbaston, Birmingham, B15 2TT, UK
- Michaël Gillon
- ORCiD
- Astrobiology Research Unit, Université de Liège , Allée du 6 Août 19C, B-4000 Liège, Belgium
- Emmanuel Jehin
- ORCiD
- Space Sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège , Allée du 6 Août 19C, B-4000 Liège, Belgium
- William C. Waalkes
- ORCiD
- Department of Physics and Astronomy, Dartmouth College , Hanover, NH 03755, USA
- Zachory K. Berta-Thompson
- ORCiD
- Department of Astrophysical & Planetary Sciences, University of Colorado Boulder , Boulder, CO 80309, USA
- Steve B. Howell
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Elise Furlan
- ORCiD
- NASA Exoplanet Science Institute , Caltech/IPAC, Mail Code 100-22, 1200 E. California Blvd., Pasadena, CA 91125, USA
- George R. Ricker
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Roland Vanderspek
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Sara Seager
- ORCiD
- Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA; Department of Aeronautics and Astronautics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Joshua N. Winn
- ORCiD
- Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544, USA ; [email protected]
- Jon M. Jenkins
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- David Rapetti
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA; Research Institute for Advanced Computer Science, Universities Space Research Association , Washington, DC 20024, USA
- Karen A. Collins
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- David Charbonneau
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Christopher J. Burke
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- David R. Rodriguez
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- DOI
- https://doi.org/10.3847/1538-3881/ad6f07
- Journal volume & issue
-
Vol. 168,
no. 5
p. 202
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).
Keywords
- Exoplanet systems
- Exoplanet astronomy
- Transit photometry
- Radial velocity
- Space telescopes
- M dwarf stars
