This website uses cookies

The University of Liège wishes to use cookies or trackers to store and access your personal data, to perform audience measurement. Some cookies are necessary for the website to function. Cookie policy.

No full text
Unpublished conference/Abstract (Scientific congresses and symposiums)
The hot Jupiter WASP-­121 b: A planet heading towards its doom (contributed talk)
Delrez, Laetitia
2015I° Advanced School on Exoplanetary Science
 

Files


Full Text
No document available.

Send to



Details



Abstract :
[en] We present here the discovery by the WASP-South survey, in close collaboration with the Euler and TRAPPIST telescopes, of WASP-121 b, a new remarkable short-period transiting hot Jupiter. WASP-121 b is a very inflated (1.86 Rjup) Jupiter-mass (1.18 Mjup) planet that transits every 1.27 days a bright active F6V star. A notable property of WASP-121b is that its orbital semi-major axis is only 15% larger than its Roche limit, which suggests that the planet might be close to tidal disruption. Furthermore, its large size and extreme irradiation (7.1 10^9 erg s^-1 cm^-2) make it an excellent target for atmospheric studies via secondary eclipse observations. Using the TRAPPIST robotic telescope, we indeed detect its thermal emission in the z’-band at better than ~4sigma, the measured occultation depth being 603+-130 ppm. This measurement is a first for a ground-based 60cm telescope. Finally, from a measurement of the Rossiter-McLaughlin effect with the CORALIE spectrograph, we infer a sky-projected spin-orbit angle of 257.8+-6 deg. This result indicates a significant misalignment between the spin axis of the host star and the orbital plane of the planet, the planet being in a nearly polar orbit.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Delrez, Laetitia ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Language :
English
Title :
The hot Jupiter WASP-­121 b: A planet heading towards its doom (contributed talk)
Publication date :
28 May 2015
Event name :
I° Advanced School on Exoplanetary Science
Event place :
Vietri sul Mare, Italy
Event date :
25-29 mai 2015
Available on ORBi :
since 31 May 2015

Statistics


Number of views
98 (9 by ULiège)
Number of downloads
0 (0 by ULiège)

Bibliography


Similar publications



Contact ORBi