LHS 1815b: The First Thick-disk Planet Detected by TESS
Article
Article Title | LHS 1815b: The First Thick-disk Planet Detected by TESS |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Gan, Tianjun (Author), Shporer, Avi (Author), Livingston, John H. (Author), Collins, Karen A. (Author), Mao, Shude (Author), Trani, Alessandro A. (Author), Gandolfi, Davide (Author), Hirano, Teruyuki (Author), Luque, Rafael (Author), Stassun, Keivan G. (Author), Ziegler, Carl (Author), Howell, Steve B. (Author), Hellier, Coel (Author), Irwin, Jonathan M. (Author), Winters, Jennifer G. (Author), Anderson, David R. (Author), Briceno, Cesar (Author), Law, Nicholas (Author), Mann, Andrew W. (Author), Bonfils, Xavier (Author), Astudillo-Defru, Nicola (Author), Jensen, Eric L. N. (Author), Anglada-Escude, Guillem (Author), Ricker, George R. (Author), Vanderspek, Roland (Author), Latham, David W. (Author), Seager, Sara (Author), Winn, Joshua N. (Author), Jenkins, Jon M. (Author), Furesz, Gabor (Author), Guerrero, Natalia M. (Author), Quintana, Elisa (Author), Twicken, Joseph D. (Author), Caldwell, Douglas A. (Author), Tenenbaum, Peter (Author), Huang, Chelsea X. (Author), Rowden, Pamela (Author) and Rojas-Ayala, Barbara (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 159 (4), pp. 1-12 |
Article Number | 160 |
Number of Pages | 12 |
Year | 2020 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ab775a |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ab775a |
Abstract | We report the first discovery of a thick-disk planet, LHS 1815b (TOI-704b, TIC 260004324), detected in the Transiting Exoplanet Survey Satellite (TESS) survey. LHS 1815b transits a bright (V = 12.19 mag, K = 7.99 mag) and quiet M dwarf located 29.87 ± 0.02 pc away with a mass of 0.502 ± 0.015 M o˙ and a radius of 0.501 ± 0.030 R o˙. We validate the planet by combining space- and ground-based photometry, spectroscopy, and imaging. The planet has a radius of 1.088 ± 0.064 R ⊕ with a 3σ mass upper limit of 8.7 M ⊕. We analyze the galactic kinematics and orbit of the host star LHS 1815 and find that it has a large probability (P thick/P thin = 6482) to be in the thick disk with a much higher expected maximal height (Z max = 1.8 kpc) above the Galactic plane compared with other TESS planet host stars. Future studies of the interior structure and atmospheric properties of planets in such systems using, for example, the upcoming James Webb Space Telescope, can investigate the differences in formation efficiency and evolution for planetary systems between different Galactic components (thick disks, thin disks, and halo). |
Keywords | Astrometric exoplanet detection (2130); Astrometry (80); Stellar kinematics (1608); Transit photometry (1709); Radial velocity (1332); Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Astrophysics of Galaxies; Astrophysics - Solar and Stellar 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 | Tsinghua University, China |
Massachusetts Institute of Technology, United States | |
University of Tokyo, Japan | |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of Turin, Italy | |
Tokyo Institute of Technology, Japan | |
Institute of Astrophysics of the Canary Islands, Spain | |
Vanderbilt University, United States | |
University of Toronto, Canada | |
National Aeronautics and Space Administration (NASA), United States | |
Keele University, United Kingdom | |
Cerro Tololo Inter-American Observatory, Chile | |
University of North Carolina, United States | |
Grenoble Alpes University, France | |
Catholic University of the Most Holy Conception (UCSC), Chile | |
Swarthmore College, United States | |
Queen Mary University of London, United Kingdom | |
Princeton University, United States | |
NASA Ames Research Center, United States | |
NASA Goddard Space Flight Center, United States | |
Open University, United Kingdom | |
University of Tarapaca, Chile |
https://research.usq.edu.au/item/q725x/lhs-1815b-the-first-thick-disk-planet-detected-by-tess
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