Confirming the Warm and Dense Sub-Saturn TIC 139270665 b with the Automated Planet Finder and Unistellar Citizen Science Network
Article
Article Title | Confirming the Warm and Dense Sub-Saturn TIC 139270665 b with the Automated Planet Finder and Unistellar Citizen Science Network |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Peluso, Daniel O’Conner, Dalba, Paul A., Wright, Duncan, Esposito, Thomas M., Sgro, Lauren A., Weaver, Ian C., Marchis, Franck, Dragomir, Diana, Villanueva, Steven Jr., Fulton, Benjamin, Isaacson, Howard, Gupta, Arvind F., Jacobs, Thomas Lee, LaCourse, Daryll M., Gagliano, Robert, Kristiansen, Martti H., Omohundro, Mark, Schwengeler, Hans M., Terentev, Ivan A., Vanderburg, Andrew, Balakrishnan, Ananya, Bhamidipati, Divya, Hovland, Marco, Jain, Serina and Jay, Nathan |
Journal Title | The Astronomical Journal |
Journal Citation | 167 (4) |
Article Number | 170 |
Number of Pages | 19 |
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/ad2772 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ad2772/meta |
Abstract | We report the discovery and confirmation of the Transiting Exoplanet Survey Satellite (TESS) single-transit, warm and dense sub-Saturn, TIC 139270665 b. This planet is unusually dense for its size: with a bulk density of 2.13 g cm−3 (0.645RJ, 0.463MJ), it is the densest warm sub-Saturn of the TESS family. It orbits a metal-rich G2 star. We also found evidence of a second planet, TIC 139270665 c, with a longer period of 1010 220 780 - + days and minimum mass M i P sin of 4.89 0.37 0.66 - + MJ. First clues of TIC 139270665 b’s existence were found by citizen scientists inspecting TESS photometric data from sector 47 in 2022 January. Radial velocity measurements from the Automated Planet Finder combined with TESS photometry and spectral energy distributions via EXOFASTv2 system modeling suggested a 23.624 0.031 0.030 - + day orbital period for TIC 139270665 b and also showed evidence for the second planet. Based on this estimated period, we mobilized the Unistellar citizen science network for photometric follow-up, capitalizing on their global distribution to capture a second transit of TIC 139270665 b. This citizen science effort also served as a test bed for an education initiative that integrates young students into modern astrophysics data collection. The Unistellar photometry did not definitively detect a second transit, but did enable us to further constrain the planet’s period. As a transiting, warm, and dense sub-Saturn, TIC 139270665 b represents an interesting laboratory for further study to enhance our models of planetary formation and evolution. |
Keywords | Exoplanet astronomy; Amateur astronomy; Radial velocitynet ; Transit photometry; Extrasolar gaseous giant planets; Extrasolar gaseous planets; Extrasolar gaseous giant planets |
Related Output | |
Is part of | Democratizing & Enhancing Exoplanet Research with the Unistellar Citizen Science Network & Astronomy Modeling Instruction |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Public Notes | This article is part of a UniSQ Thesis by publication. See Related Output. |
https://research.usq.edu.au/item/z5yv5/confirming-the-warm-and-dense-sub-saturn-tic-139270665-b-with-the-automated-planet-finder-and-unistellar-citizen-science-network
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