The TESS–Keck Survey. I. A Warm Sub-Saturn-mass Planet and a Caution about Stray Light in TESS Cameras
Article
Article Title | The TESS–Keck Survey. I. A Warm Sub-Saturn-mass Planet and a Caution about Stray Light in TESS Cameras |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Dalba, Paul A. (Author), Gupta, Arvind F. (Author), Rodriguez, Joseph E. (Author), Dragomir, Diana (Author), Huang, Chelsea X. (Author), Kane, Stephen R. (Author), Quinn, Samuel N. (Author), Bieryla, Allyson (Author), Esquerdo, Gilbert A. (Author), Fulton, Benjamin J. (Author), Scarsdale, Nicholas (Author), Batalha, Natalie M. (Author), Beard, Corey (Author), Behmard, Aida (Author), Chontos, Ashley (Author), Crossfield, Ian J. M. (Author), Dressing, Courtney D. (Author), Giacalone, Steven (Author), Hill, Michelle L. (Author), Hirsch, Lea A. (Author), Howard, Andrew W. (Author), Huber, Daniel (Author), Isaacson, Howard (Author), Kosiarek, Molly (Author), Lubin, Jack (Author), Mayo, Andrew W. (Author), Mocnik, Teo (Author), Akana Murphy, Joseph M. (Author), Petigura, Erik A. (Author), Robertson, Paul (Author), Rosenthal, Lee J. (Author), Roy, Arpita (Author), Rubenzahl, Ryan A. (Author), Van Zandt, Judah (Author), Weiss, Lauren M. (Author), Knudstrup, Emil (Author), Andersen, Mads F. (Author), Grundahl, Frank (Author), Yao, Xinyu (Author), Pepper, Joshua (Author), Villanueva, Steven, Jr. (Author), Ciardi, David R. (Author), Cloutier, Ryan (Author), Jacobs, Thomas Lee (Author), Kristiansen, Martti H. (Author), LaCourse, Daryll M. (Author), Lendl, Monika (Author), Osborn, Hugh P. (Author), Palle, Enric (Author), Stassun, Keivan G. (Author), Stevens, Daniel J. (Author), Ricker, George R. (Author), Vanderspek, Roland (Author), Latham, David W. (Author), Seager, S. (Author), Winn, Joshua N. (Author), Jenkins, Jon M. (Author), Caldwell, Douglas A. (Author), Daylan, Tansu (Author), Fong, William (Author), Goeke, Robert F. (Author), Rose, Mark E. (Author), Rowden, Pamela (Author), Schlieder, Joshua E. (Author), Smith, Jeffrey C. (Author) and Vanderburg, Andrew (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 159 (5), pp. 1-13 |
Article Number | 239 |
Number of Pages | 13 |
Year | 2020 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ab84e3 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ab84e3 |
Abstract | We report the detection of a Saturn-size exoplanet orbiting HD 332231 (TOI 1456) in light curves from the Transiting Exoplanet Survey Satellite (TESS). HD 332231 - an F8 dwarf star with a V-band magnitude of 8.56 - was observed by TESS in Sectors 14 and 15. We detect a single-transit event in the Sector 15 presearch data conditioning (PDC) light curve. We obtain spectroscopic follow-up observations of HD 332231 with the Automated Planet Finder, Keck I, and SONG telescopes. The orbital period we infer from radial velocity (RV) observations leads to the discovery of another transit in Sector 14 that was masked by PDC due to scattered light contamination. A joint analysis of the transit and RV data confirms the planetary nature of HD 332231 b, a Saturn-size (0.867-0.025+0.027RJ), sub-Saturn-mass (0.244±0.021MJ) exoplanet on a 18.71 day circular orbit. The low surface gravity of HD 332231 b and the relatively low stellar flux it receives make it a compelling target for transmission spectroscopy. Also, the stellar obliquity is likely measurable via the Rossiter-McLaughlin effect, an exciting prospect given the 0.14 au orbital separation of HD 332231 b. The spectroscopic observations do not provide substantial evidence for any additional planets in the HD 332231 system, but continued RV monitoring is needed to further characterize this system. We also predict that the frequency and duration of masked data in the PDC light curves for TESS Sectors 14-16 could hide transits of some exoplanets with orbital periods between 10.5 and 17.5 days. |
Keywords | Exoplanet astronomy (486); Radial velocity (1332); Transit photometry (1709); Exoplanet detection methods (489); Exoplanets (498); F dwarf stars (516); Spectroscopy (1558); Direct imaging (387); Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Instrumentation and Methods for Astrophysics; Astrophysics - Solar and Stellar Astrophysics |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | University of California, United States |
Pennsylvania State University, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of New Mexico, United States | |
Massachusetts Institute of Technology, United States | |
National Aeronautics and Space Administration (NASA), United States | |
California Institute of Technology (Caltech), United States | |
University of Hawaii, United States | |
University of Kansas, United States | |
Stanford University, United States | |
Centre for Astrophysics | |
Gemini Observatory, United States | |
Aarhus University, Denmark | |
Lehigh University, United States | |
No affiliation | |
Technical University of Denmark, Denmark | |
University of Geneva, Switzerland | |
Institute of Astrophysics of the Canary Islands, Spain | |
Vanderbilt University, United States | |
Princeton University, United States | |
NASA Ames Research Center, United States | |
Open University, United Kingdom | |
NASA Goddard Space Flight Center, United States | |
University of Texas at Austin, United States |
https://research.usq.edu.au/item/q7265/the-tess-keck-survey-i-a-warm-sub-saturn-mass-planet-and-a-caution-about-stray-light-in-tess-cameras
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