A Second Earth-sized Planet in the Habitable Zone of the M Dwarf, TOI-700
Article
Article Title | A Second Earth-sized Planet in the Habitable Zone of the M Dwarf, TOI-700 |
---|---|
ERA Journal ID | 1057 |
Article Category | Article |
Authors | Gilbert, Emily A., Vanderburg, Andrew, Rodriguez, Joseph E., Hord, Benjamin J., Clement, Matthew S., Barclay, Thomas, Quintana, Elisa V., Schlieder, Joshua E., Kane, Stephen R., Jenkins, Jon M., Twicken, Joseph D., Kunimoto, Michelle, Vanderspek, Roland, Arney, Giada N., Charbonneau, David, Gunther, Maximilian N., Huang, Chelsea X., Isopi, Giovanni, Kostov, Veselin B., Kristiansen, Martti H., Latham, David W., Mallia, Franco, Mamajek, Eric E., Mireles, Ismael, Quinn, Samuel N., Ricker, George R., Schulte, Jack, Seager, S., Suissa, Gabrielle, Winn, Joshua N., Youngblood, Allison and Zapparata, Aldo |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 944 (2), p. L35 |
Number of Pages | 11 |
Year | 2023 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/2041-8213/acb599 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/2041-8213/acb599 |
Abstract | We report the discovery of TOI-700 e, a 0.95 R⊕ planet residing in the Optimistic Habitable Zone (HZ) of its host star. This discovery was enabled by multiple years of monitoring from NASA's Transiting Exoplanet Survey Satellite (TESS) mission. The host star, TOI-700 (TIC 150428135), is a nearby (31.1 pc), inactive, M2.5 dwarf (Vmag = 13.15). TOI-700 is already known to host three planets, including the small, HZ planet, TOI-700 d. The new planet has an orbital period of 27.8 days, and based on its radius (0.95 R⊕), it is likely rocky. TOI-700 was observed for 21 sectors over Years 1 and 3 of the TESS mission, including 10 sectors at 20 s cadence in Year 3. Using this full set of TESS data and additional follow-up observations, we identify, validate, and characterize TOI-700 e. This discovery adds another world to the short list of small, HZ planets transiting nearby and bright host stars. Such systems, where the stars are bright enough that follow-up observations are possible to constrain planet masses and atmospheres using current and future facilities, are incredibly valuable. The presence of multiple small, HZ planets makes this system even more enticing for follow-up observations. |
Keywords | Exoplanet systems; Transit photometry; Low mass stars; M dwarf stars; |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Byline Affiliations | California Institute of Technology (Caltech), United States |
Massachusetts Institute of Technology, United States | |
Michigan State University, United States | |
University of Maryland, United States | |
NASA Goddard Space Flight Center, United States | |
Carnegie Institution for Science, United States | |
Johns Hopkins University, United States | |
University of California Berkeley, United States | |
NASA Ames Research Center, United States | |
SETI Institute, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
European Space Research and Technology Centre (ESTEC), Netherlands | |
University of Southern Queensland | |
Campo Catino Astronomical Observatory, Italy | |
Brorfelde Observatory, Denmark | |
University of New Mexico, United States | |
University of Washington, United States | |
Princeton University, United States |
https://research.usq.edu.au/item/yy947/a-second-earth-sized-planet-in-the-habitable-zone-of-the-m-dwarf-toi-700
Download files
52
total views49
total downloads7
views this month5
downloads this month