The Astronomical Journal (Jan 2024)
The TESS–Keck Survey. XIX. A Warm Transiting Sub-Saturn-mass Planet and a Nontransiting Saturn-mass Planet Orbiting a Solar Analog
- Michelle L. Hill,
- Stephen R. Kane,
- Paul A. Dalba,
- Mason MacDougall,
- Tara Fetherolf,
- Zhexing Li,
- Daria Pidhorodetska,
- Natalie M. Batalha,
- Ian J. M. Crossfield,
- Courtney Dressing,
- Benjamin Fulton,
- Andrew W. Howard,
- Daniel Huber,
- Howard Isaacson,
- Erik A. Petigura,
- Paul Robertson,
- Lauren M. Weiss,
- Aida Behmard,
- Corey Beard,
- Ashley Chontos,
- Fei Dai,
- Steven Giacalone,
- Lea A. Hirsch,
- Rae Holcomb,
- Jack Lubin,
- Andrew W. Mayo,
- Teo Močnik,
- Joseph M. Akana Murphy,
- Alex S. Polanski,
- Lee J. Rosenthal,
- Ryan A. Rubenzahl,
- Nicholas Scarsdale,
- Emma V. Turtelboom,
- Judah Van Zandt,
- Allyson Bieryla,
- David R. Ciardi,
- Jason D. Eastman,
- Ben Falk,
- Katharine M. Hesse,
- David W. Latham,
- John Livingston,
- Rachel A. Matson,
- Elisabeth Matthews,
- George R. Ricker,
- Alexander Rudat,
- Joshua E. Schlieder,
- S. Seager,
- Joshua N. Winn
Affiliations
- Michelle L. Hill
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- Stephen R. Kane
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- Paul A. Dalba
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- Mason MacDougall
- ORCiD
- Department of Physics & Astronomy, University of California Los Angeles , Los Angeles, CA 90095, USA
- Tara Fetherolf
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA; Department of Physics, California State University , San Marcos, CA 92096, USA
- Zhexing Li
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- Daria Pidhorodetska
- ORCiD
- Department of Earth and Planetary Sciences, University of California , Riverside, CA 92521, USA
- Natalie M. Batalha
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95060, USA
- Ian J. M. Crossfield
- Department of Physics & Astronomy, University of Kansas , 1082 Malott, 1251 Wescoe Hall Drive, Lawrence, KS 66045, USA
- Courtney Dressing
- ORCiD
- 501 Campbell Hall, University of California at Berkeley , Berkeley, CA 94720, USA
- Benjamin Fulton
- ORCiD
- NASA Exoplanet Science Institute/Caltech-IPAC , MC 314-6, 1200 E. California Boulevard, Pasadena, CA 91125, USA
- Andrew W. Howard
- ORCiD
- Department of Astronomy, California Institute of Technology , Pasadena, CA 91125, USA
- Daniel Huber
- ORCiD
- Institute for Astronomy, University of Hawai‘i , 2680 Woodlawn Drive, Honolulu, HI 96822, USA; Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney , NSW 2006, Australia
- Howard Isaacson
- ORCiD
- Department of Astronomy, University of California Berkeley , Berkeley, CA 94720, USA; Centre for Astrophysics, University of Southern Queensland , Toowoomba, QLD, Australia
- Erik A. Petigura
- ORCiD
- Department of Physics & Astronomy, University of California Los Angeles , Los Angeles, CA 90095, USA
- Paul Robertson
- ORCiD
- Department of Physics & Astronomy, University of California Irvine , Irvine, CA 92697, USA
- Lauren M. Weiss
- ORCiD
- Institute for Astronomy, University of Hawai‘i , 2680 Woodlawn Drive, Honolulu, HI 96822, USA
- Aida Behmard
- ORCiD
- Department of Astrophysics, American Museum of Natural History , 200 Central Park West, Manhattan, NY 10024, USA
- Corey Beard
- ORCiD
- Department of Physics & Astronomy, University of California Irvine , Irvine, CA 92697, USA
- Ashley Chontos
- ORCiD
- Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08540, USA
- Fei Dai
- ORCiD
- Department of Astronomy, California Institute of Technology , Pasadena, CA 91125, USA; Division of Geological and Planetary Sciences , 1200 E California Boulevard, Pasadena, CA 91125, USA
- Steven Giacalone
- ORCiD
- Department of Astronomy, California Institute of Technology , Pasadena, CA 91125, USA
- Lea A. Hirsch
- ORCiD
- Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305, USA
- Rae Holcomb
- ORCiD
- Department of Physics & Astronomy, University of California Irvine , Irvine, CA 92697, USA
- Jack Lubin
- ORCiD
- Department of Physics & Astronomy, University of California Los Angeles , Los Angeles, CA 90095, USA; Department of Physics & Astronomy, University of California Irvine , Irvine, CA 92697, USA
- Andrew W. Mayo
- ORCiD
- Department of Astronomy, University of California Berkeley , Berkeley, CA 94720, USA
- Teo Močnik
- ORCiD
- Gemini Observatory/NSF’s NOIRLab , 670 N. A’ohoku Place, Hilo, HI 96720, USA
- Joseph M. Akana Murphy
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
- Alex S. Polanski
- ORCiD
- Department of Physics and Astronomy, University of Kansas , Lawrence, KS 66045, USA
- Lee J. Rosenthal
- ORCiD
- Department of Astronomy, California Institute of Technology , Pasadena, CA 91125, USA
- Ryan A. Rubenzahl
- ORCiD
- Department of Astronomy, California Institute of Technology , Pasadena, CA 91125, USA
- Nicholas Scarsdale
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95060, USA
- Emma V. Turtelboom
- ORCiD
- Department of Astronomy, 501 Campbell Hall, University of California , Berkeley, CA 94720, USA
- Judah Van Zandt
- ORCiD
- Department of Physics & Astronomy, University of California Los Angeles , Los Angeles, CA 90095, USA
- Allyson Bieryla
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- David R. Ciardi
- ORCiD
- Caltech/IPAC-NASA Exoplanet Science Institute , 770 S. Wilson Avenue, Pasadena, CA 91106, USA
- Jason D. Eastman
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Ben Falk
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Katharine M. Hesse
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- David W. Latham
- ORCiD
- Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- John Livingston
- ORCiD
- Astrobiology Center , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; National Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Astronomical Science Program, Graduate University for Advanced Studies , SOKENDAI, 2-21-1, Osawa, Mitaka, Tokyo 181-8588, Japan
- Rachel A. Matson
- ORCiD
- U.S. Naval Observatory , Washington, DC 20392, USA
- Elisabeth Matthews
- ORCiD
- Max-Planck-Institut für Astronomie , Königstuhl 17, 69117 Heidelberg, Germany
- George R. Ricker
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Alexander Rudat
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Joshua E. Schlieder
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- S. Seager
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA; Department of Earth, Atmospheric and Planetary Sciences, 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 , Princeton, NJ 08544, USA
- DOI
- https://doi.org/10.3847/1538-3881/ad2765
- Journal volume & issue
-
Vol. 167,
no. 4
p. 151
Abstract
The Transiting Exoplanet Survey Satellite (TESS) continues to increase dramatically the number of known transiting exoplanets, and is optimal for monitoring bright stars amenable to radial velocity (RV) and atmospheric follow-up observations. TOI-1386 is a solar-type (G5V) star that was detected via TESS photometry to exhibit transit signatures in three sectors with a period of 25.84 days. We conducted follow-up RV observations using Keck/High Resolution Echelle Spectrometer (HIRES) as part of the TESS–Keck Survey, collecting 64 RV measurements of TOI-1386 with the HIRES spectrograph over 2.5 yr. Our combined fit of the TOI-1386 photometry and RV data confirm the planetary nature of the detected TESS signal, and provide a mass and radius for planet b of 0.148 ± 0.019 M _J and 0.540 ± 0.017 R _J , respectively, marking TOI-1386 b as a warm sub-Saturn planet. Our RV data further reveal an additional outer companion, TOI-1386 c, with an estimated orbital period of 227.6 days and a minimum mass of 0.309 ± 0.038 M _J . The dynamical modeling of the system shows that the measured system architecture is long-term stable, although there may be substantial eccentricity oscillations of the inner planet due to the dynamical influence of the outer planet.
Keywords
- Exoplanets
- Exoplanet astronomy
- Exoplanet detection methods
- Radial velocity
- Transit photometry
- Photometry
