TESS Discovery of Twin Planets near 2:1 Resonance around Early M Dwarf TOI 4342
Article
Article Title | TESS Discovery of Twin Planets near 2:1 Resonance around Early M Dwarf TOI 4342 |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Tey, Evan, Huang, Chelsea X., Kunimoto, Michelle, Vanderburg, Andrew, Shporer, Avi, Quinn, Samuel N., Zhou, George, Collins, Karen A, Collins, Kevin I., Jensen, Eric L. N., Schwarz, Richard P., Sefako, Ramotholo, Gan, Tianjun, Furlan, Elise, Gnilka, Crystal L., Howell, Steve B., Lester, Kathryn V., Ziegler, Carl, Briceno, César, Law, Nicholas, Mann, Andrew W., Ricker, George R., Vanderspek, Roland K., Latham, David W., Seager, S., Jenkins, Jon M., Winn, Joshua N., Caldwell, Douglas A., Charbonneau, David, Burke, Christopher J. and Essack, Zahra |
Journal Title | The Astronomical Journal |
Journal Citation | 165, p. 93 |
Number of Pages | 13 |
Year | 2023 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/acaf88 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/acaf88 |
Abstract | With data from the Transiting Exoplanet Survey Satellite (TESS), we showcase improvements to the MIT Quick Look Pipeline (QLP) through the discovery and validation of a multiplanet system around M dwarf TOI 4342 (Tmag = 11.032, M⋆ = 0.63 M⊙, R⋆ = 0.60 R⊙, Teff = 3900 K, d = 61.54 pc). With updates to QLP, including a new multiplanet search, as well as faster cadence data from TESS's First Extended Mission, we discovered two sub-Neptunes (Rb=2.266_-0.038^+0.038R⊕ and Rc=2.415_-0.040^+0.043R⊕; Pb = 5.538 days and Pc = 10.689 days) and validated them with ground-based photometry, spectra, and speckle imaging. Both planets notably have high transmission spectroscopy metrics of 36 and 32, making TOI 4342 one of the best systems for comparative atmospheric studies. This system demonstrates how improvements to QLP, along with faster cadence full-frame images, can lead to the discovery of new multiplanet systems. |
Keywords | Exoplanet astronomy; Transit photometry; M dwarf stars; 486; 1709; |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Byline Affiliations | Massachusetts Institute of Technology, United States |
University of Southern Queensland | |
Center for Astrophysics Harvard and Smithsonian, United States | |
George Mason University, United States | |
Swarthmore College, United States | |
South African Astronomical Observatory, South Africa | |
Tsinghua University, China | |
NASA Exoplanet Science Institute, United States | |
NASA Ames Research Center, United States | |
Stephen F. Austin State University, United States | |
Cerro Tololo Inter-American Observatory, Chile | |
University of North Carolina, United States | |
Princeton University, United States | |
SETI Institute, United States |
https://research.usq.edu.au/item/yy942/tess-discovery-of-twin-planets-near-2-1-resonance-around-early-m-dwarf-toi-4342
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