• DOI:10.1051/0004-6361/200911897
• Corpus ID: 10454322

The Rossiter-McLaughlin effect of CoRoT-3b and HD 189733b

@article{Triaud2009TheRE,
  title={The Rossiter-McLaughlin effect of CoRoT-3b and HD 189733b},
  author={Amaury H. M. J. Triaud and Didier Queloz and François Bouchy and Claire Moutou and Andrew Collier Cameron and Antonio Claret and Pierre Barge and W. Benz and Magali Deleuil and Tristan Guillot and Guillaume H'ebrard and Alain Lecavelier des Etangs and Christophe Lovis and Michel Mayor and Francesco A. Pepe and St{\'e}phane Udry},
  journal={Astronomy and Astrophysics},
  year={2009},
  volume={506},
  pages={377-384}
}

• A. Triaud, D. Queloz, +13 authors S. Udry
• Published 17 July 2009
• Physics, Geology
• Astronomy and Astrophysics

We present radial-velocity sequences acquired during three transits of the exoplanet HD 189733b and one transit of CoRoT-3b. We applied a combined Markov-chain Monte-Carlo analysis of spectroscopic and photometric data on these stars, to determine a full set of system parameters including the projected spin-orbit misalignment angle of HD 189733b to an unprecedented precision via the Rossiter-McLaughlin effect: β = 0.85 ◦ +0.32 −0.28 . This small but non-zero inclination of the planetary orbit is important to understand the origin of the system. On CoRoT-3b, results seem to point towards a non-zero inclination as well with β = 37.6 ◦ +10.0 −22.3 , but this remains marginal. Systematic effects due to non-Gaussian cross-correlation functions appear to be the main cause of significant residuals that prevent an accurate determination of the projected stellar rotation velocity V sin(I) for both stars.