GJ 1252 b: A 1.2 R⊕ Planet Transiting an M3 Dwarf at 20.4 pc
Article
Article Title | GJ 1252 b: A 1.2 R⊕ Planet Transiting an M3 Dwarf at 20.4 pc |
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ERA Journal ID | 45091 |
Article Category | Article |
Authors | Shporer, Avi (Author), Collins, Karen A. (Author), Astudillo-Defru, Nicola (Author), Irwin, Jonathan (Author), Bonfils, Xavier (Author), Collins, Kevin I. (Author), Matthews, Elisabeth (Author), Winters, Jennifer G. (Author), Anderson, David R. (Author), Armstrong, James D. (Author), Charbonneau, David (Author), Cloutier, Ryan (Author), Daylan, Tansu (Author), Gan, Tianjun (Author), Gunther, Maximilian N. (Author), Hellier, Coel (Author), Horne, Keith (Author), Huang, Chelsea X. (Author), Jensen, Eric L. N. (Author), Kielkopf, John (Author), Palle, Enric (Author), Sefako, Ramotholo (Author), Stassun, Keivan G. (Author), Tan, Thiam-Guan (Author), Vanderburg, Andrew (Author), Ricker, George R. (Author), Latham, David W. (Author), Vanderspek, Roland (Author), Seager, Sara (Author), Winn, Joshua N. (Author), Jenkins, Jon M. (Author), Colon, Knicole (Author), Dressing, Courtney D. (Author), Leepine, Sebastien (Author), Muirhead, Philip S. (Author), Rose, Mark E. (Author), Twicken, Joseph D. (Author) and Villasenor, Jesus Noel (Author) |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 890 (1), pp. 1-13 |
Article Number | L7 |
Number of Pages | 13 |
Year | 2020 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/2041-8213/ab7020 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/2041-8213/ab7020 |
Abstract | We report the discovery of GJ 1252 b, a planet with a radius of 1.193 ± 0.074 R and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 M, 0.391 ± 0.020 R) located 20.385 ± 0.019 pc away. We use Transiting Exoplanet Survey Satellite (TESS) data, ground-based photometry and spectroscopy, Gaia astrometry, and high angular resolution imaging to show that the transit signal seen in the TESS data must originate from a transiting planet. We do so by ruling out all false-positive scenarios that attempt to explain the transit signal as originating from an eclipsing stellar binary. Precise Doppler monitoring also leads to a tentative mass measurement of 2.09 ± 0.56 M ⊕. The host star proximity, brightness (V = 12.19 mag, K = 7.92 mag), low stellar activity, and the system's short orbital period make this planet an attractive target for detailed characterization, including precise mass measurement, looking for other objects in the system, and planet atmosphere characterization. |
Keywords | Exoplanet astronomy (486); M dwarf stars (982); Exoplanets (498); Astrophysics - Earth and Planetary 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 | Massachusetts Institute of Technology, United States |
Center for Astrophysics Harvard and Smithsonian, United States | |
Catholic University of the Most Holy Conception (UCSC), Chile | |
Grenoble Alpes University, France | |
George Mason University, United States | |
Keele University, United Kingdom | |
University of Hawaii, United States | |
Tsinghua University, China | |
University of St Andrews, United Kingdom | |
Swarthmore College, United States | |
School of Mathematics, Physics and Computing | |
Institute of Astrophysics of the Canary Islands, Spain | |
South African Astronomical Observatory, South Africa | |
Vanderbilt University, United States | |
Perth Exoplanet Survey Telescope Observatory, Australia | |
University of Texas at Austin, United States | |
Princeton University, United States | |
NASA Ames Research Center, United States | |
NASA Goddard Space Flight Center, United States | |
University of California, United States | |
Georgia State University, United States | |
Boston University, United States | |
National Aeronautics and Space Administration (NASA), United States |
https://research.usq.edu.au/item/q7235/gj-1252-b-a-1-2-r-planet-transiting-an-m3-dwarf-at-20-4-pc
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