Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission
Article
Article Title | Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Carmichael, Theron W. (Author), Quinn, Samuel N. (Author), Mustill, Alexander J. (Author), Huang, Chelsea (Author), Zhou, George (Author), Persson, Carina M. (Author), Nielsen, Louise D. (Author), Collins, Karen A. (Author), Ziegler, Carl (Author), Collins, Kevin I. (Author), Rodriguez, Joseph E. (Author), Shporer, Avi (Author), Brahm, Rafael (Author), Mann, Andrew W. (Author), Bouchy, Francois (Author), Fridlund, Malcolm (Author), Stassun, Keivan G. (Author), Hellier, Coel (Author), Seidel, Julia V. (Author), Stalport, Manu (Author), Udry, Stephane (Author), Pepe, Francesco (Author), Ireland, Michael (Author), Zerjal, Marusa (Author), Briceno, Cesar (Author), Law, Nicholas (Author), Jordan, Andres (Author), Espinoza, Nestor (Author), Henning, Thomas (Author), Sarkis, Paula (Author) and Latham, David W. (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 160 (1), pp. 1-15 |
Article Number | 53 |
Number of Pages | 15 |
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/ab9b84 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ab9b84 |
Abstract | We report the discovery of two intermediate-mass transiting brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA's Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital period of P=.55604±0.00016 days, a mass of Mb = 64.1±1.9 MJ, and a radius of Rb = 0.75±0.02 RJ. Its host star, TOI-569, has a mass of Må = 1.21±0.05 M, a radius of Rå = 1.47±0.03 R, [Fe H 0.29 0.09] = + dex, and an effective temperature of Teff = 5768±10K. TOI-1406b has an orbital period of P=10.57415±0.00063 days, a mass of Mb = 46.0± 2.7 MJ, and a radius of Rb = 0.86±0.03 RJ. The host star for this BD has a mass of Må = 1.18±0.09 M, a radius of Rå = 1.35±0.03 R, [Fe/H] =-0.08± 0.09 dex, and an effective temperature of Teff = 6290±100 K. Both BDs are in circular orbits around their host stars and are older than 3 Gyr based on stellar isochrone models of the stars. TOI-569 is one of two slightly evolved stars known to host a transiting BD (the other being KOI-415). TOI-1406b is one of three known transiting BDs to occupy the mass range of 40-50 MJ and one of two to have a circular orbit at a period near 10 days (with the first being KOI-205b). Both BDs have reliable ages from stellar isochrones, in addition to their well-constrained masses and radii, making them particularly valuable as tests for substellar isochrones in the BD mass-radius diagram. |
Keywords | Brown dwarfs; Radial velocity; Transit photometry; Spectroscopy; Photometry; Substellar companion stars; Astrophysics - Solar and Stellar; Astrophysics; 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 | File reproduced in accordance with the copyright policy of the publisher/author. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Harvard University, United States |
Center for Astrophysics Harvard and Smithsonian, United States | |
Lund University, Sweden | |
Massachusetts Institute of Technology, United States | |
Chalmers University of Technology, Sweden | |
University of Geneva, Switzerland | |
University of Toronto, Canada | |
George Mason University, United States | |
Adolfo Ibanez University, Chile | |
University of North Carolina, United States | |
Vanderbilt University, United States | |
Keele University, United Kingdom | |
Australian National University | |
Cerro Tololo Inter-American Observatory, Chile | |
Space Telescope Science Institute, United States | |
Max Planck Society, Germany |
https://research.usq.edu.au/item/q6x32/two-intermediate-mass-transiting-brown-dwarfs-from-the-tess-mission
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