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Transiting exoplanets from the CoRoT space mission

J. Cabrera, Sz. Csizmadia, G. Montagnier, M. Fridlund, M. Ammler-von Eiff, S. Chaintreuil, C. Damiani, M. Deleuil, S. Ferraz-Mello, A. Ferrigno, D. Gandolfi, T. Guillot (+41 others)
2015 Astronomy and Astrophysics  

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2015 pre-print
arXiv:1504.01532v1 fatcat:xbfr3jk44zax3dxop7acptceza
2015 accepted
arXiv:1504.01532v2 fatcat:yj54gkko45hbtjlctxidxfuay4
Context. We present the discovery of two transiting extrasolar planets by the satellite CoRoT. Aims. We aim at a characterization of the planetary bulk parameters, which allow us to further investigate the formation and evolution of the planetary systems and the main properties of the host stars. Methods. We used the transit light curve to characterize the planetary parameters relative to the stellar parameters. The analysis of HARPS spectra established the planetary nature of the detections,
more » ... oviding their masses. Further photometric and spectroscopic ground-based observations provided stellar parameters (log g,Teff,v sin i) to characterize the host stars. Our model takes the geometry of the transit to constrain the stellar density into account, which when linked to stellar evolutionary models, determines the bulk parameters of the star. Because of the asymmetric shape of the light curve of one of the planets, we had to include the possibility in our model that the stellar surface was not strictly spherical. Results. We present the planetary parameters of CoRoT-28b, a Jupiter-sized planet (mass 0.484+/-0.087MJup; radius 0.955+/-0.066RJup) orbiting an evolved star with an orbital period of 5.208 51 +/- 0.000 38 days, and CoRoT-29b, another Jupiter-sized planet (mass 0.85 +/- 0.20MJup; radius 0.90 +/- 0.16RJup) orbiting an oblate star with an orbital period of 2.850 570 +/- 0.000 006 days. The reason behind the asymmetry of the transit shape is not understood at this point. Conclusions. These two new planetary systems have very interesting properties and deserve further study, particularly in the case of the star CoRoT-29.
doi:10.1051/0004-6361/201424501 fatcat:pjfamouljzh4ffrxpulskoj5oe
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Citation

J. Cabrera, Sz. Csizmadia, G. Montagnier, M. Fridlund, M. Ammler-von Eiff, S. Chaintreuil, C. Damiani, M. Deleuil, S. Ferraz-Mello, A. Ferrigno, D. Gandolfi, T. Guillot, E. W. Guenther, A. Hatzes, G. Hébrard, P. Klagyivik, H. Parviainen, Th. Pasternacki, M. Pätzold, D. Sebastian, M. Tadeu dos Santos, G. Wuchterl, S. Aigrain, R. Alonso, J.-M. Almenara, J. D. Armstrong, M. Auvergne, A. Baglin, P. Barge, S. C. C. Barros, A. S. Bonomo, P. Bordé, F. Bouchy, S. Carpano, C. Chaffey, H. J. Deeg, R. F. Díaz, R. Dvorak, A. Erikson, S. Grziwa, J. Korth, H. Lammer, C. Lindsay, T. Mazeh, C. Moutou, A. Ofir, M. Ollivier, E. Pallé, H. Rauer, D. Rouan, B. Samuel, A. Santerne, J. Schneider. "Transiting exoplanets from the CoRoT space mission." Astronomy and Astrophysics (2015) A36