Browsing by Author "Ehrenreich, D."

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  • Detection and characterisation of 54 massive companions with the SOPHIE spectrograph Seven new brown dwarfs and constraints on the brown dwarf desert 

    Kiefer, F.; Hébrard, G.; Sahlmann, J.; Sousa, S. G.; Forveille, T.; Santos, N.; Mayor, M.; Deleuil, M.; Wilson, P. A.; Dalal, S.; Díaz, R. F.; Henry, G. W.; Hagelberg, J.; Hobson, M. J.; Demangeon, O.; Bourrier, V.; Delfosse, X.; Arnold, L.; Astudillo Defru, Nicola; Beuzit, J. L.; Boisse, I.; Bonfils, X.; Borgniet, S.; Bouchy, F.; Courcol, B.; Ehrenreich, D.; Hara, N.; Lagrange, A. M.; Lovis, C.; Montagnier, G.; Moutou, C.; Pepe, F.; Perrier, C.; Rey, J.; Santerne, A.; Ségransan, D.; Udry, S.; Vidal-Madjar, A. (2019-11-05)
    Brown dwarfs (BD) are substellar objects intermediate between planets and stars with masses of ∼13–80 MJ . While isolated BDs are most likely produced by gravitational collapse in molecular clouds down to masses of a few ...

  • Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) III. Atmospheric structure of the misaligned ultra-hot Jupiter WASP-121b 

    Bourrier, V.; Ehrenreich, D.; Lendl, M.; Cretignier, M.; Allart, R.; Dumusque, X.; Cegla, H. M.; Suarez Mascareno, A.; Wyttenbach, A.; Hoeijmakers, H. J.; Melo, C.; Kuntzer, T.; Astudillo Defru, Nicola; Giles, H.; Heng, K.; Kitzmann, D.; Lavie, B.; Lovis, C.; Murgas, F.; Nascimbeni, V.; Pepe, F.; Pino, L.; Segransan, D.; Udry, S. (2020-04)
    Ultra-hot Jupiters offer interesting prospects for expanding our theories on dynamical evolution and the properties of extremely irradiated atmospheres. In this context, we present the analysis of new optical spectroscopy ...

  • Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS): IV. A spectral inventory of atoms and molecules in the high-resolution transmission spectrum of WASP-121 b 

    Hoeijmakers, H. J.; Seidel, J. V.; Pino, L.; Kitzmann, D.; Sindel, J. P.; Ehrenreich, D.; Oza, A. V.; Bourrier, V.; Allart, R.; Gebek, A.; Lovis, C.; Yurchenko, S. N.; Astudillo Defru, Nicola; Bayliss, D.; Cegla, H.; Lavie, B.; Lendl, M.; Melo, C.; Murgas, F.; Nascimbeni, V.; Pepe, F.; Ségransan, D.; Udry, S.; Wyttenbach, A.; Heng, K. (2020-09-18)
    Context. WASP-121 b is a hot Jupiter that was recently found to possess rich emission (day side) and transmission (limb) spectra, suggestive of the presence of a multitude of chemical species in the atmosphere. Aims. ...

  • Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS)? V. Detection of sodium on the bloated super-Neptune WASP-166b 

    Seidel, J. V.; Ehrenreich, D.; Bourrier, V.; Allart, R.; Attia, O.; Hoeijmakers, H. J.; Lendl, M.; Linder, E.; Wyttenbach, A.; Astudillo Defru, Nicola; Bayliss, D.; Cegla, H. M.; Heng, Kevin; Lavie, B.; Lovis, C.; Melo, C.; Pepe, F.; dos Santos, L. A.; Ségransan, D.; Udry, S. (2020-07-06)
    Planet formation processes or evolution mechanisms are surmised to be at the origin of the hot Neptune desert. Studying exoplanets currently living within or at the edge of this desert could allow disentangling the respective ...

  • Optical phase curve of the ultra-hot Jupiter WASP-121b 

    Bourrier, V.; Kitzmann, D.; Kuntzer, T.; Nascimbeni, V.; Lendl, M.; Lavie, B.; Hoeijmakers, H. J.; Pino, L.; Ehrenreich, D.; Heng, K.; Allart, R.; Cegla, H. M.; Dumusque, X.; Melo, C.; Astudillo Defru, Nicola; Caldwell, Douglas A.; Cretignier, M.; Giles, H.; Henze, C. E.; Jenkins, J.; Lovis, C.; Murgas, F.; Pepe, F.; Ricker, G. R.; Rose, M. E.; Seager, S.; Segransan, D.; Suárez-Mascareño, A.; Udry, S.; Vanderspek, R.; Wyttenbach, A. (2020-05)
    We present the analysis of TESS optical photometry of WASP-121b, which reveals the phase curve of this transiting ultra-hot Jupiter. Its hotspot is located at the sub-stellar point, showing inefficient heat transport from ...