期刊
ASTRONOMY & ASTROPHYSICS
卷 623, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201834577
关键词
planets and satellites: detection; planets and satellites: individual: HD1397b; planets and satellites: individual: TOI-120; planets and satellites: individual: 394137592
资金
- Swiss National Science Foundation (SNSF)
- Gaia Multilateral Agreement
- European Southern Observatory under ESO programme [0102.C-0503(A)]
- Australian Research Council [LE160100001, DP180100972]
- Mount Cuba Astronomical Foundation
- University of Southern Queensland
- MIT
- Nanjing University
- George Mason University
- University of Louisville
- University of California Riverside
- University of Florida
- University of Texas at Austin
- Australian Research Council [LE160100001] Funding Source: Australian Research Council
The Transiting Exoplanet Survey Satellite TESS has begun a new age of exoplanet discoveries around bright host stars. We present the discovery of HD1397b (TOI-120.01), a giant planet in an 11:54-day eccentric orbit around a bright (V = 7.9) G-type subgiant. We estimate both host star and planetary parameters consistently using EXOFASTv2 based on TESS time-series photometry of transits and radial velocity measurements with CORALIE and MINERVA-Australis. We also present high angular resolution imaging with NaCo to rule out any nearby eclipsing binaries. We find that HD1397b is a Jovian planet, with a mass of 0.415 +/- 0.020 M-J and a radius of 1.026 +/- 0.026 R-J. Characterising giant planets in short-period eccentric orbits, such as HD1397b, is important for understanding and testing theories for the formation and migration of giant planets as well as planet-star interactions.
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