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http://hdl.handle.net/20.500.12386/32073
Titolo: | Optical phase curve of the ultra-hot Jupiter WASP-121b | Autori: | Bourrier, V. Kitzmann, D. Kuntzer, T. Nascimbeni, V. Lendl, M. Lavie, B. Hoeijmakers, H. J. Pino, Lorenzo 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. |
Data pubblicazione: | 2020 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 637 | Da pagina:: | A36 | 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<SUP>-</SUP> continuum. <P />The reduced light curve of WASP-121, phase-folded at the planet orbital period and binned (Fig. 2) is available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/637/A36">http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/637/A36</A> | URI: | http://hdl.handle.net/20.500.12386/32073 | URL: | https://www.aanda.org/articles/aa/full_html/2020/05/aa36647-19/aa36647-19.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/201936647 | Bibcode ADS: | 2020A&A...637A..36B | Fulltext: | open |
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