Skip to Main content Skip to Navigation
Theses

Détection et caractérisation d’exoplanètes avec le télescope spatial CoRoT : contributions à la découverte et étude physique de la super-terre CoRoT-7b

Abstract : The transit photometry makes it possible to detect exoplanets by measuring their radii. Pursuing this goal, the space telescope CoRoT (Convection, Rotation and planetary Transits), launched in December 2006, is equiped with a high-precision photometer allowing both planet detection by transit photometry, and stellar physics studies (asteroseismology).For this PhD thesis, I have developed various computing tools for the detection and detailed analysis of the transits in CoRoT light curves. I have applied these tools to almost 12 000 stars observed during each of the first ten campaigns of observation. The collaboration between the detection and ground based follow-up teams led to the discovery, up to now, of fifteen planets and two brown dwarfs.It is possible to constrain the physical natures of these exoplanets thanks to the knowledge of the masses and radii: they can be gazeous, icy, rocky or with an mixed nature.The search for rocky planets in particular, is a goal motivated by their singular nature, and both by the paucity of detections of these objects (due to their low masses and radii), Thus, the discovery of CoRoT-7b -- the first exoplanet compatible with a rocky model and whith measured radius (1.6 Earth radius) and mass (around 7 Earth masses) -- allowed us to develope a physical model to which I contributed :I studied the possibility of observing this very hot planet in the near infrared range with JWST, during its orbit, to estimate the temperature contrast between the day and the night faces. This should allow to confirm / invalidate our model with atmosphere dense enough to redistribute heat at the surface of CoRoT-7b.
Complete list of metadata

Cited literature [153 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00603013
Contributor : Abes Star :  Contact Connect in order to contact the contributor
Submitted on : Thursday, July 28, 2011 - 3:25:21 PM
Last modification on : Wednesday, October 14, 2020 - 3:56:48 AM
Long-term archiving on: : Sunday, December 4, 2016 - 10:11:25 PM

Identifiers

  • HAL Id : tel-00603013, version 1

Collections

INSU | CNRS | STAR

Citation

Benjamin Samuel. Détection et caractérisation d’exoplanètes avec le télescope spatial CoRoT : contributions à la découverte et étude physique de la super-terre CoRoT-7b. Autre [cond-mat.other]. Université Paris Sud - Paris XI, 2011. Français. ⟨NNT : 2011PA112049⟩. ⟨tel-00603013⟩

Share

Metrics

Record views

1100

Files downloads

8929