The Astronomical Journal (Jan 2023)
TESS Discovery of Twin Planets near 2:1 Resonance around Early M Dwarf TOI 4342
- Evan Tey,
- Chelsea X. Huang,
- Michelle Kunimoto,
- Andrew Vanderburg,
- Avi Shporer,
- Samuel N. Quinn,
- George Zhou,
- Karen A. Collins,
- Kevin I. Collins,
- Eric L. N. Jensen,
- Richard P. Schwarz,
- Ramotholo Sefako,
- Tianjun Gan,
- Elise Furlan,
- Crystal L. Gnilka,
- Steve B. Howell,
- Kathryn V. Lester,
- Carl Ziegler,
- César Briceño,
- Nicholas Law,
- Andrew W. Mann,
- George R. Ricker,
- Roland K. Vanderspek,
- David W. Latham,
- S. Seager,
- Jon M. Jenkins,
- Joshua N. Winn,
- Douglas A. Caldwell,
- David Charbonneau,
- Christopher J. Burke,
- Zahra Essack
Affiliations
- Evan Tey
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- Chelsea X. Huang
- ORCiD
- University of Southern Queensland , West St, Darling Heights, Toowoomba, Queensland, 4350, Australia
- Michelle Kunimoto
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- Andrew Vanderburg
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- Avi Shporer
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- Samuel N. Quinn
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- George Zhou
- ORCiD
- University of Southern Queensland , West St, Darling Heights, Toowoomba, Queensland, 4350, Australia
- Karen A. Collins
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Kevin I. Collins
- ORCiD
- George Mason University , 4400 University Drive, Fairfax, VA 22030, USA
- Eric L. N. Jensen
- ORCiD
- Department of Physics and Astronomy, Swarthmore College , 500 College Avenue, Swarthmore, PA 19081, USA
- Richard P. Schwarz
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Ramotholo Sefako
- South African Astronomical Observatory , P.O. Box 9, Observatory, Cape Town, 7935, South Africa
- Tianjun Gan
- ORCiD
- Department of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University , Beijing, 100084, People’s Republic of China
- Elise Furlan
- ORCiD
- Caltech/IPAC-NExScI, NASA Exoplanet Science Institute , 1200 East California Boulevard, Mail Code 100-22, Pasadena, CA 91125, USA
- Crystal L. Gnilka
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Steve B. Howell
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Kathryn V. Lester
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Carl Ziegler
- Department of Physics, Engineering and Astronomy, Stephen F. Austin State University , 1936 North Street, Nacogdoches, TX 75962, USA
- César Briceño
- Cerro-Tololo Inter-American Observatory , Casilla 603, La Serena, Chile
- Nicholas Law
- ORCiD
- Department of Physics and Astronomy, The University of North Carolina at Chapel Hill , Chapel Hill, NC 27599-3255, USA
- Andrew W. Mann
- ORCiD
- Department of Physics and Astronomy, The University of North Carolina at Chapel Hill , Chapel Hill, NC 27599-3255, USA
- George R. Ricker
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- Roland K. Vanderspek
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- David W. Latham
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- S. Seager
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA; Department of Aeronautics and Astronautics, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Jon M. Jenkins
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Joshua N. Winn
- ORCiD
- Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544, USA
- Douglas A. Caldwell
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA; SETI Institute , Moffett Field, Mountain View, CA 94035, 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 Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]
- Zahra Essack
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA ; [email protected]; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- DOI
- https://doi.org/10.3847/1538-3881/acaf88
- Journal volume & issue
-
Vol. 165,
no. 3
p. 93
Abstract
With data from the Transiting Exoplanet Survey Satellite (TESS), we showcase improvements to the MIT Quick Look Pipeline (QLP) through the discovery and validation of a multiplanet system around M dwarf TOI 4342 ( T _mag = 11.032, M _⋆ = 0.63 M _⊙ , R _⋆ = 0.60 R _⊙ , T _eff = 3900 K, d = 61.54 pc). With updates to QLP, including a new multiplanet search, as well as faster cadence data from TESS’s First Extended Mission, we discovered two sub-Neptunes ( ${R}_{b}={2.266}_{-0.038}^{+0.038}$ R _⊕ and ${R}_{c}={2.415}_{-0.040}^{+0.043}$ R _⊕ ; P _b = 5.538 days and P _c = 10.689 days) and validated them with ground-based photometry, spectra, and speckle imaging. Both planets notably have high transmission spectroscopy metrics of 36 and 32, making TOI 4342 one of the best systems for comparative atmospheric studies. This system demonstrates how improvements to QLP, along with faster cadence full-frame images, can lead to the discovery of new multiplanet systems.
Keywords
