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TOI-481 b and TOI-892 b: Two Long-period Hot Jupiters from the Transiting Exoplanet Survey Satellite
- Source :
- The Astronomical Journal. 160(5)
- Publication Year :
- 2020
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 2020.
-
Abstract
- We present the discovery of two new 10 day period giant planets from the Transiting Exoplanet Survey Satellite mission, whose masses were precisely determined using a wide diversity of ground-based facilities. TOI-481 b and TOI-892 b have similar radii (0.99 ± 0.01 R(J) and 1.07 ± 0.02 R(J), respectively), and orbital periods (10.3311 days and 10.6266 days, respectively), but significantly different masses (1.53 ± 0.03 M(J) versus 0.95 ± 0.07 M(J), respectively). Both planets orbit metal-rich stars ([Fe/HG] = +0.26 ± 0.05 dex and [Fe/H] = +0.24 ± 0.05 for TOI-481 and TOI-892, respectively) but at different evolutionary stages. TOI-481 is a M(*) = 1.14 ± 0.02 Mꙩ, R(*) = 1.66 ± 0.02 Rꙩ G-type star (T(eff) = 5735 ± 72 K), that with an age of 6.7 Gyr, is in the turn-off point of the main sequence. TOI-892 on the other hand, is a F-type dwarf star (T(eff) = 6261 ± 80 K), which has a mass of M(*) = 1.28 ± 0.03 Mꙩ and a radius of R(*) = 1.39 ± 0.02 Rꙩ. TOI-481 b and TOI-892 b join the scarcely populated region of transiting gas giants with orbital periods longer than 10 days, which is important to constrain theories of the formation and structure of hot Jupiters.
- Subjects :
- Astronomy
Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 15384357 and 0004637X
- Volume :
- 160
- Issue :
- 5
- Database :
- NASA Technical Reports
- Journal :
- The Astronomical Journal
- Notes :
- 985788
- Publication Type :
- Report
- Accession number :
- edsnas.20210012866
- Document Type :
- Report
- Full Text :
- https://doi.org/10.3847/1538-3881/abba3b