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Planètes extrasolaires à courte période orbitale: De la détection à la caractérisation des Jupiter-chauds

Abstract : More than 300 extrasolar planets have been discovered. The variety and diversity of their characteristics are extremely wide. A significant part of them constitute the Hot-Jupiter population, which is strongly different from the planets we found in our Solar System. These planets have a mass from one to few Jupiter masses, and are at very short distance from their parent star (less than 0.1 AU). The study of this population bring us robust constrains on the formation and evolution models, especially if these planets transit in front of their star. The works I've done during my PhD yield to detect and characterise 14 transiting extrasolar planets, thanks to the SuperWASP program and the CoRoT mission combined to the recent SOPHIE spectrograph (OHP). One of them has the shortest orbital period ever detected and another one is the largest massive ob ject ever detected by transit. I've also run a new approach in order to detect Hot-Jupiter with a multi-fiber instrument, strongly decreasing the on-telescope time. We show that the FLAMES/GIRAFFE instrument (ESO) could reach a RV precision of 30 m s−1. We also demonstrate that a such program is very efficient in order to select the most promising candidates. We then used this approach to do the follow-up of the transiting candidates of the LRc01 and Src01 CoRoT fields. We concluded that an instrument with a large field of view is necessary to be surely efficient. Additionally, I've detected and studied the spectroscopic transit of three different planets. This brought
to the scientific community strong constrains on those planetary systems, and unveil the presence of a uncommon system : X0-3.
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Contributor : Benoit Loeillet <>
Submitted on : Friday, January 16, 2009 - 1:57:37 PM
Last modification on : Thursday, December 10, 2020 - 3:10:52 AM
Long-term archiving on: : Saturday, November 26, 2016 - 4:25:14 AM


  • HAL Id : tel-00353240, version 2


Benoit Loeillet. Planètes extrasolaires à courte période orbitale: De la détection à la caractérisation des Jupiter-chauds. Astrophysique [astro-ph]. Université de Provence - Aix-Marseille I, 2008. Français. ⟨tel-00353240v2⟩



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