Nielsen, L. D; Bouchy, F; Turner, O; Giles, H; Mascareño, A. Suárez; Lovis, C; Marmier, M; Pepe, F; Ségransan, D; Udry, S; Otegi, J. F; Ottoni, G; Stalport, M; Ricker, G; Vanderspek, R; Latham, D. W; Seager, S; Winn, J. N; Jenkins, J. M; Kane, S. R; Wittenmyer, R. A; Bowler, B; Crossfield, I; Horner, J; Kielkopf, J; Morton, T; Plavchan, P; Tinney, C. G; Zhang, Hui; Wright, D. J; Mengel, M. W; Clark, J. T; Okumura, J; Addison, B; Caldwell, D. A; Cartwright, S. M; Collins, K. A; Francis, J; Guerrero, N; Huang, C. X; Matthews, E. C; Pepper, J; Rose, M; Villaseñor, J; Wohler, B; Stassun, K; Howell, S; Ciardi, D; Gonzales, E; Matson, R; Beichman, C; Schlieder, J
A Jovian planet in an eccentric 11.5 day orbit around HD 1397 discovered by TESS
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  • Astronomy and astrophysics (Berlin), 2019, Vol.623, p.A100
Ort / Verlag
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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.
ISSN: 0004-6361
ISSN: 1432-0746
ISSN: 1432-0746
DOI: 10.1051/0004-6361/201834577

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