A Jovian planet in an eccentric 11.5 day orbit around HD 1397 discovered by TESS
Name
aa34577-18.pdf
Description
Published version
Size
1.14 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Nielsen, L. D.
Bouchy, F.
Turner, O.
Giles, H.
Mascareño, A. Suárez
Lovis, C.
Marmier, M.
Pepe, F.
Ségransan, D.
Udry, S.
Date Issued
March 2019
Journal
Astronomy & Astrophysics
Publisher
EDP Sciences
Citation
Nielsen, L. D. et al. "A Jovian planet in an eccentric 11.5 day orbit around HD 1397 discovered by TESS." Astronomy & Astrophysics 623 (March 2019): A100 © 2019 ESO
Version
Final published version
Abstract
The Transiting Exoplanet Survey Satellite TESS has begun a new age of exoplanet discoveries around bright host stars. We present the discovery of HD 1397b (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 HD 1397b is a Jovian planet, with a mass of 0.415 ± 0.020 MJ and a radius of 1.026 ± 0.026 RJ. Characterising giant planets in short-period eccentric orbits, such as HD 1397b, is important for understanding and testing theories for the formation and migration of giant planets as well as planet-star interactions.
Subjects
Space and Planetary Science
Astronomy and Astrophysics
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1051/0004-6361/201834577
