Hint of a transiting extended atmosphere on 55 Cancri b

  title={Hint of a transiting extended atmosphere on 55 Cancri b},
  author={David Ehrenreich and Vincent Bourrier and Xavier Bonfils and Alain Lecavelier des Etangs and Guillaume H'ebrard and David K. Sing and Peter J. Wheatley and Alfred Vidal-Madjar and Xavier Delfosse and St{\'e}phane Udry and Thierry Forveille and Claire Moutou},
  journal={Astronomy and Astrophysics},
The naked-eye star 55 Cancri hosts a planetary system with five known planets, including a hot super-Earth (55 Cnc e) extremely close to its star and a farther out giant planet (55 Cnc b), found in milder irradiation conditions with respect to other known hot Jupiters. This system raises important questions on the evolution of atmospheres for close-in exoplanets, and the dependence with planetary mass and irradiation. These questions can be addressed by Lyman- transit observations of the… 
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