The TESS-Keck Survey. XIX. A Warm Transiting Sub-Saturn-mass Planet and a Nontransiting Saturn-mass Planet Orbiting a Solar Analog
Article
Hill, Michelle L., Kane, Stephen R., Dalba, Paul A., MacDougall, Mason, Fetherolf, Tara, Li, Zhexing, Pidhorodetska, Daria, Batalha, Natalie M, Crossfield, Ian J. M., Dressing, Courtney, Fulton, Benjamin, Howard, Andrew W., Huber, Daniel, Isaacson, Howard, Petigura, Erik A., Robertson, Paul, Weiss, Lauren M., Behmard, Aida, Beard, Corey, ..., Winn, Joshua N.. 2024. "The TESS-Keck Survey. XIX. A Warm Transiting Sub-Saturn-mass Planet and a Nontransiting Saturn-mass Planet Orbiting a Solar Analog." The Astronomical Journal. 167 (4). https://doi.org/10.3847/1538-3881/ad2765
Article Title | The TESS-Keck Survey. XIX. A Warm Transiting Sub-Saturn-mass Planet and a Nontransiting Saturn-mass Planet Orbiting a Solar Analog |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Hill, Michelle L., Kane, Stephen R., Dalba, Paul A., MacDougall, Mason, Fetherolf, Tara, Li, Zhexing, Pidhorodetska, Daria, Batalha, Natalie M, Crossfield, Ian J. M., Dressing, Courtney, Fulton, Benjamin, Howard, Andrew W., Huber, Daniel, Isaacson, Howard, Petigura, Erik A., Robertson, Paul, Weiss, Lauren M., Behmard, Aida, Beard, Corey, Chontos, Ashley, Dai, Fei, Giacalone, Steven, Hirsch, Lea A., Holcomb, Rae, Lubin, Jack, Mayo, Andrew W., Mocnik, Teo, Akana Murphy, Joseph M., Polanski, Alex S., Rosenthal, Lee J., Rubenzahl, Ryan A., Scarsdale, Nicholas, Turtelboom, Emma V., Van Zandt, Judah, Bieryla, Allyson, Ciardi, David R., Eastman, Jason D., Falk, Ben, Hesse, Katharine M., Latham, David W., Livingston, John, Matson, Rachel A., Matthews, Elisabeth, Ricker, George R., Rudat, Alexander R, Schlieder, Joshua E, Seager, S. and Winn, Joshua N. |
Journal Title | The Astronomical Journal |
Journal Citation | 167 (4) |
Article Number | 151 |
Number of Pages | 12 |
Year | 2024 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ad2765 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ad2765 |
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 MJ and 0.540 ± 0.017 RJ, 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 MJ. 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 | Spectral energy distribution; Spectroscopy; Exoplanets ; Exoplanet astronomy; Exoplanet detection methods ; Radial velocity ; Transit photometry ; Photometry; Light curves |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Byline Affiliations | University of California Riverside, United Sates |
University of California Santa Cruz, United States | |
University of California Los Angeles, United States | |
California State University San Marcos, United States | |
University of Kansas, United States | |
University of California Berkeley, United States | |
NASA Exoplanet Science Institute, United States | |
California Institute of Technology (Caltech), United States | |
University of Sydney | |
University of Hawaii, United States | |
Centre for Astrophysics | |
University of California Irvine, United States | |
American Museum of Natural History, United States | |
Princeton University, United States | |
Division of Geological and Planetary Sciences, United States | |
Stanford University, United States | |
Gemini Observatory, United States | |
NSF's National Optical Infrared Astronomy Research Laboratory (NOIRLab), United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Space Telescope Science Institute, United States | |
Massachusetts Institute of Technology, United States | |
Astrobiology Center, Japan | |
National Astronomical Observatory of Japan, Japan | |
Graduate University for Advanced Studies, Japan | |
United States Naval Observatory, United States | |
Max Planck Institute for Astronomy, Germany | |
NASA Goddard Space Flight Center, United States |
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