"Osiris"(HD209458b), an evaporating planet

Preprint English OPEN
Vidal-Madjar, Alfred; Etangs, Alain Lecavelier des;
(2003)
  • Subject: Astrophysics
    arxiv: Astrophysics::Earth and Planetary Astrophysics

Three transits of the planet orbiting the solar type star HD209458 were observed in the far UV at the wavelength of the HI Ly-alpha line. The planet size at this wavelength is equal to 4.3 R_Jup, i.e. larger than the planet Roche radius (3.6 R_Jup). Absorbing hydrogen a... View more
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