학술논문
Optical phase curve of the ultra-hot Jupiter WASP-121b
Document Type
Working Paper
Author
Bourrier, V.; Kitzmann, D.; Kuntzer, T.; Nascimbeni, V.; Lendl, M.; Lavie, B.; Hoeijmakers, H. J.; Pino, L.; Ehrenreich, D.; Heng, K.; Allart, R.; Cegla, H. M; Dumusque, X.; Melo, C.; Astudillo-Defru, N.; Caldwell, D. A.; Cretignier, M.; Giles, H.; Henze, C. E.; Jenkins, J.; Lovis, C.; Murgas, F.; Pepe, F.; Ricker, G. R.; Rose, M. E.; Seager, S.; Segransan, D.; Suarez-Mascareno, A.; Udry, S.; Vanderspek, R.; Wyttenbach, A.
Source
A&A 637, A36 (2020)
Subject
Language
Abstract
We present the analysis of TESS optical photometry of WASP-121b, which reveal the phase curve of this transiting ultra-hot Jupiter. Its hotspot is located at the substellar point, showing inefficient heat transport from the dayside (2870 K) to the nightside ($<$ 2200 K) at the altitudes probed by TESS. The TESS eclipse depth, measured at the shortest wavelength to date for WASP-121b, confirms the strong deviation from blackbody planetary emission. Our atmospheric retrieval on the complete emission spectrum supports the presence of a temperature inversion, which can be explained by the presence of VO and possibly TiO and FeH. The strong planetary emission at short wavelengths could arise from an H$^{-}$ continuum.
Comment: 11 pages, 5 figures, submitted to A&A
Comment: 11 pages, 5 figures, submitted to A&A