Optical phase curve of the ultra-hot Jupiter WASP-121b

Seager, S.; Heng, K.; Rose, M. E.; Nascimbeni, V.; Wyttenbach, A.; Cretignier, M.; Vanderspek, R.; Giles, H.; Caldwell, Douglas A.; Astudillo Defru, Nicola; Henze, C. E.; Hoeijmakers, H. J.; Lendl, M.; Kuntzer, T.; Dumusque, X.; Segransan, D.; Lovis, C.; Lavie, B.; Murgas, F.; Bourrier, V.; Ricker, G. R.; Suárez-Mascareño, A.; Ehrenreich, D.; Pino, L.; Pepe, F.; Udry, S.; Cegla, H. M.; Kitzmann, D.; Allart, R.; Melo, C.; Jenkins, J.

View/Open

Optical phase curve of the ultra-hot Jupiter WASP-121b.pdf (486.2Kb)

Date

2020-05

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, Nicola

Caldwell, Douglas 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.

Suárez-Mascareño, A.

Udry, S.

Vanderspek, R.

Wyttenbach, A.

Publisher

EDP Sciences

Description

Artículo de publicación ISI

Metadata

Show full item record

Abstract

We present the analysis of TESS optical photometry of WASP-121b, which reveals the phase curve of this transiting ultra-hot Jupiter. Its hotspot is located at the sub-stellar point, showing inefficient heat transport from the dayside (2870 ± 50 K) to the nightside (<2500 K at 3σ) 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.