A Jovian planet in an eccentric 11.5 day orbit around HD1397 discovered by TESS
A Jovian planet in an eccentric 11.5 day orbit around HD1397 discovered by TESS
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 11.54day 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 CORALIE radial velocity measurements. We find that HD 1397b is a Jovian planet, with a mass of $0.419\pm-0.024$ M$_{\rm Jup}$ and a radius of $1.023^{+0.023}_{-0.026$}$ R$_{\rm Jup}$. 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.
G. Ricker、R. Wittenmyer、J. N. Winn、M. Stalport、R. Matson、E. C. Matthews、I. Crossfield、G. Ottoni、J. F. Otegi、S. M. Cartwright、F. Pepe、D. Ciardi、E. Gonzales、J. Schlieder、M. Marmier、S. R. Kane、J. M. Jenkins、A. Suarez Mascareno、B. Wohler、C. Beighman、R. Vanderspek、J. Villasenor、K. Stassun、C. Lovis、S. Udry、N. Guerrero、H. Giles、F. Bouchy、D. Segransan、D. Latham、C. X. Huang、J. Pepper、S. Howell、S. Seager、M. Rose、L. D. Nielsen、J. Francis、O. Turner、K. A. Collins
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G. Ricker,R. Wittenmyer,J. N. Winn,M. Stalport,R. Matson,E. C. Matthews,I. Crossfield,G. Ottoni,J. F. Otegi,S. M. Cartwright,F. Pepe,D. Ciardi,E. Gonzales,J. Schlieder,M. Marmier,S. R. Kane,J. M. Jenkins,A. Suarez Mascareno,B. Wohler,C. Beighman,R. Vanderspek,J. Villasenor,K. Stassun,C. Lovis,S. Udry,N. Guerrero,H. Giles,F. Bouchy,D. Segransan,D. Latham,C. X. Huang,J. Pepper,S. Howell,S. Seager,M. Rose,L. D. Nielsen,J. Francis,O. Turner,K. A. Collins.A Jovian planet in an eccentric 11.5 day orbit around HD1397 discovered by TESS[EB/OL].(2018-11-05)[2025-06-25].https://arxiv.org/abs/1811.01882.点此复制
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