Details

Autor(en) / Beteiligte

• 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.
• Suárez-Mascareño, A.
• Udry, S.
• Vanderspek, R.
• Wyttenbach, A.

Titel

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

Ist Teil von

• Astronomy and astrophysics (Berlin), 2020-05, Vol.637, p.A36

Ort / Verlag

Heidelberg: EDP Sciences

Erscheinungsjahr

2020

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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 3 σ ) 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.