The Astronomical Journal (Jan 2025)
TESS Giants Transiting Giants. VII. A Hot Saturn Orbiting an Oscillating Red Giant Star
- Nicholas Saunders,
- Samuel K. Grunblatt,
- Daniel Huber,
- J. M. Joel Ong,
- Kevin C. Schlaufman,
- Daniel Hey,
- Yaguang Li,
- R. P. Butler,
- Jeffrey D. Crane,
- Steve Shectman,
- Johanna K. Teske,
- Samuel N. Quinn,
- Samuel W. Yee,
- Rafael Brahm,
- Trifon Trifonov,
- Andrés Jordán,
- Thomas Henning,
- David K. Sing,
- Meredith MacGregor,
- Catherine A. Clark,
- Colin Littlefield,
- Sarah Deveny,
- Steve B. Howell,
- Emma Page,
- David Rapetti,
- Ben Falk,
- Alan M. Levine,
- Chelsea X. Huang,
- Michael B. Lund,
- George R. Ricker,
- S. Seager,
- Joshua N. Winn,
- Jon M. Jenkins
Affiliations
- Nicholas Saunders
- ORCiD
- Institute for Astronomy, University of Hawaii at Mānoa , 2680 Woodlawn Drive, Honolulu, HI 96822, USA
- Samuel K. Grunblatt
- ORCiD
- William H. Miller III Department of Physics & Astronomy, Johns Hopkins University , 3400 N Charles Street, Baltimore, MD 21218, USA; Department of Physics and Astronomy, The University of Alabama , 514 University Boulevard, Tuscaloosa, AL 35487, USA
- Daniel Huber
- ORCiD
- Institute for Astronomy, University of Hawaii at Mānoa , 2680 Woodlawn Drive, Honolulu, HI 96822, USA; Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney , NSW 2006, Australia
- J. M. Joel Ong
- ORCiD
- Institute for Astronomy, University of Hawaii at Mānoa , 2680 Woodlawn Drive, Honolulu, HI 96822, USA
- Kevin C. Schlaufman
- ORCiD
- William H. Miller III Department of Physics & Astronomy, Johns Hopkins University , 3400 N Charles Street, Baltimore, MD 21218, USA
- Daniel Hey
- ORCiD
- Institute for Astronomy, University of Hawaii at Mānoa , 2680 Woodlawn Drive, Honolulu, HI 96822, USA
- Yaguang Li
- ORCiD
- Institute for Astronomy, University of Hawaii at Mānoa , 2680 Woodlawn Drive, Honolulu, HI 96822, USA
- R. P. Butler
- ORCiD
- Earth and Planets Laboratory, Carnegie Institution for Science , 5241 Broad Branch Road NW, Washington, DC 20015, USA
- Jeffrey D. Crane
- ORCiD
- The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
- Steve Shectman
- ORCiD
- The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
- Johanna K. Teske
- ORCiD
- Earth and Planets Laboratory, Carnegie Institution for Science , 5241 Broad Branch Road NW, Washington, DC 20015, USA; The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
- Samuel N. Quinn
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Samuel W. Yee
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Rafael Brahm
- ORCiD
- Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez , Av. Diagonal las Torres 2640, Peñalolén, Santiago, Chile; Millennium Institute for Astrophysics , Santiago, Chile; Data Observatory Foundation , Santiago, Chile
- Trifon Trifonov
- ORCiD
- Landessternwarte, Zentrum für Astronomie der Universtät Heidelberg , Königstuhl 12, 69117 Heidelberg, Germany; Department of Astronomy, Sofia University St Kliment Ohridski , 5 James Bourchier Blvd, BG-1164 Sofia, Bulgaria
- Andrés Jordán
- ORCiD
- Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez , Av. Diagonal las Torres 2640, Peñalolén, Santiago, Chile; Millennium Institute for Astrophysics , Santiago, Chile; Data Observatory Foundation , Santiago, Chile
- Thomas Henning
- ORCiD
- Max-Planck-Institut für Astronomie , Königstuhl 17, 69117 Heidelberg, Germany
- David K. Sing
- ORCiD
- William H. Miller III Department of Physics & Astronomy, Johns Hopkins University , 3400 N Charles Street, Baltimore, MD 21218, USA
- Meredith MacGregor
- ORCiD
- William H. Miller III Department of Physics & Astronomy, Johns Hopkins University , 3400 N Charles Street, Baltimore, MD 21218, USA
- Catherine A. Clark
- ORCiD
- NASA Exoplanet Science Institute, IPAC, California Institute of Technology , Pasadena, CA 91125, USA
- Colin Littlefield
- ORCiD
- Bay Area Environmental Research Institute , Moffett Field, CA 94035, USA; NASA Ames Research Center , Moffett Field, CA 94035, USA
- Sarah Deveny
- Bay Area Environmental Research Institute , Moffett Field, CA 94035, USA; NASA Ames Research Center , Moffett Field, CA 94035, USA
- Steve B. Howell
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- Emma Page
- ORCiD
- Department of Physics, Lehigh University , 16 Memorial Drive East, Bethlehem, PA 18015, 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
- Ben Falk
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD, 21218, USA
- Alan M. Levine
- ORCiD
- Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA
- Chelsea X. Huang
- ORCiD
- University of Southern Queensland , Centre for Astrophysics, West Street, Toowoomba, QLD 4350, Australia
- Michael B. Lund
- ORCiD
- NASA Exoplanet Science Institute, IPAC, California Institute of Technology , 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
- 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 , 4 Ivy Lane, Princeton, NJ 08544, USA
- Jon M. Jenkins
- ORCiD
- NASA Ames Research Center , Moffett Field, CA 94035, USA
- DOI
- https://doi.org/10.3847/1538-3881/ad9a87
- Journal volume & issue
-
Vol. 169,
no. 2
p. 75
Abstract
We present the discovery of TOI-7041 b (TIC 201175570 b), a hot Saturn transiting a red giant star with measurable stellar oscillations. We observe solar-like oscillations in TOI-7041 with a frequency of maximum power of ${\nu }_{{\rm{\max }}}\,=\,$ 218.50 ± 2.23 μ Hz and a large frequency separation of Δ ν = 16.5282 ± 0.0186 μ Hz. Our asteroseismic analysis indicates that TOI-7041 has a mass of 1.07 ± 0.05(stat) ± 0.02(sys) M _⊙ and a radius of 4.10 ± 0.06(stat) ± 0.05(sys) R _⊙ , making it one of the largest stars around which a transiting planet has been discovered with the Transiting Exoplanet Survey Satellite (TESS), and the mission's first oscillating red giant with a transiting planet. TOI-7041 b has an orbital period of 9.691 ± 0.006 days and a low eccentricity of e = 0.04 ± 0.04. We measure a planet radius of 1.02 ± 0.03 R _Jup with TESS photometry, and a planet mass of 0.36 ± 0.16 M _Jup (114 ± 51 M _⊕ ) with ground-based radial velocity measurements. TOI-7041 b appears less inflated than similar systems receiving equivalent incident flux, and its circular orbit indicates that it is not undergoing tidal heating due to circularization. The asteroseismic analysis of the host star provides some of the tightest constraints on the stellar properties of a TESS planet host and enables precise characterization of the hot Saturn. This system joins a small number of TESS-discovered exoplanets orbiting stars that exhibit clear stellar oscillations and indicates that extended TESS observations of evolved stars will similarly provide a path to improved exoplanet characterization.
Keywords
