The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope
Article
Article Title | The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Dalba, Paula A., Kane, Stephen R., Dragomir, Diana, Villanueva, Steven Jr., Collins, Karen A., Jacobs, Thomas Lee, LaCourse, Daryll M., Gagliano, Robert, Kristiansen, Martti H., Omohundro, Mark R., Schwengeler, Hans M., Terentev, Ivan A., Vanderburg, Andrew, Fulton, Benjamin, Isaacson, Howard, Van Zandt, Judah, Howard, Andrew W., Thorngren, Daniel P., Howell, Steve B., Batalha, Natalie M., Chontos, Ashley, Crossfield, Ian J. M., Dressing, Courtney D., Huber, Daniel, Petigura, Erik A., Robertson, Paul, Roy, Arpita, Weiss, Lauren M., Behmard, Aida, Beard, Corey, Brinkman, Casey L., Giacalone, Steven, Hill, Michelle L., Lubin, Jack, Mayo, Andrew W., Mocnik, Teo, Akana Murphy, Joseph M., Polanski, Alex S., Rice, Malena, Rosenthal, Lee J., Rubenzahl, Ryan A., Scarsdale, Nicholas, Turtelboom, Emma V., Tyler, Dakotah, Benni, Paul, Boyce, Pat, Esposito, Thomas M., Girardin, E., Laloum, Didier, Lewin, Pablo, Mann, Christopher R., Marchis, Franck, Schwarz, Richard P., Srdoc, Gregor, Steuer, Jana, Sivarani, Thirupathi, Unni, Athira, Eisner, Nora L., Fetherolf, Tara, Li, Zhexing, Yao, Xinyu, Pepper, Joshua, Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, S., Winn, Joshua N., Jenkins, John M., Burke, Christopher J., Eastman, Jason D., Lund, Michael B., Rodriguez, David R., Rowden, Pamela, Ting, Eric B. and Villasenor, Jesus Noel |
Journal Title | The Astronomical Journal |
Journal Citation | 163 (2) |
Article Number | 61 |
Number of Pages | 17 |
Year | 2022 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ac415b |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ac415b |
Abstract | We report the discovery of TOI-2180 b, a 2.8 MJ giant planet orbiting a slightly evolved G5 host star. This planet transited only once in Cycle 2 of the primary Transiting Exoplanet Survey Satellite (TESS) mission. Citizen scientists identified the 24 hr single-transit event shortly after the data were released, allowing a Doppler monitoring campaign with the Automated Planet Finder telescope at Lick Observatory to begin promptly. The radial velocity observations refined the orbital period of TOI-2180 b to be 260.8 ± 0.6 days, revealed an orbital eccentricity of 0.368 ± 0.007, and discovered long-term acceleration from a more distant massive companion. We conducted ground-based photometry from 14 sites spread around the globe in an attempt to detect another transit. Although we did not make a clear transit detection, the nondetections improved the precision of the orbital period. We predict that TESS will likely detect another transit of TOI-2180 b in Sector 48 of its extended mission. We use giant planet structure models to retrieve the bulk heavy-element content of TOI-2180 b. When considered alongside other giant planets with orbital periods over 100 days, we find tentative evidence that the correlation between planet mass and metal enrichment relative to stellar is dependent on orbital properties. Single-transit discoveries like TOI-2180 b highlight the exciting potential of the TESS mission to find planets with long orbital periods and low irradiation fluxes despite the selection biases associated with the transit method. |
Keywords | Transit photometry ; Planetary interior; Amateur astronomy; Extrasolar gaseous giant planets ; Radial velocity |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Byline Affiliations | University of California, United States |
University of New Mexico, United States | |
Massachusetts Institute of Technology, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
No affiliation | |
Brorfelde Observatory, Denmark | |
Technical University of Denmark, Denmark | |
University of Oxford, United Kingdom | |
Planet Hunter, Switzerland | |
Planet Hunter, Russia | |
NASA Exoplanet Science Institute, United States | |
Centre for Astrophysics | |
University of California Berkeley, United States | |
California Institute of Technology (Caltech), United States | |
University of Montreal, Canada | |
NASA Ames Research Center, United States | |
University of California Santa Cruz, United States | |
University of Hawaii, United States | |
University of Kansas, United States | |
Space Telescope Science Institute, United States | |
Johns Hopkins University, United States | |
Gemini Observatory, United States | |
Yale University, United States | |
University of California Los Angeles, United States | |
Acton Sky Portal, United States | |
Boyce Research Initiatives and Education Foundation, United States | |
SETI Institute, United States | |
Grand Pra Observatory, Switzerland | |
Prive du Mont Observatory, France | |
Maury Lewin Astronomical Observatory, United States | |
Unistellar, United States | |
Patashnick Voorheesville Observatory, United States | |
Kotizarovci Observatory, Croatia | |
Munich University Observatory, Germany | |
Indian Institute of Astrophysics, India | |
Lehigh University, United States | |
Shanghai Astronomical Observatory, China | |
Princeton University, United States | |
Royal Astronomical Society, United Kingdom |
https://research.usq.edu.au/item/z01x0/the-tess-keck-survey-viii-confirmation-of-a-transiting-giant-planet-on-an-eccentric-261-day-orbit-with-the-automated-planet-finder-telescope
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