Browsing by Author "Girard, J. H."

Now showing items 1-6 of 6

    • The dust disk and companion of the nearby AGB star L-2 Puppis SPHERE/ZIMPOL polarimetric imaging at visible ... 
      Kervella, Pierre; Montargès, M.; Lagadec, E.; Ridgway, S. T.; Haubois, X.; Girard, J. H.; Ohnaka, K.; Perrin, G.; Gallenne, A. (ESO, 2015)
      The bright southern star L-2 Pup is a particularly prominent asymptotic giant branch (AGB) star, located at a distance of only 64 pc. We report new adaptive optics observations of L2 Pup at visible wavelengths with the ...
    • Ground-based transit observations of the super-Earth GJ 1214 b , 
      Cáceres, C.; Kabath, P.; Hoyer, S.; Ivanov, V. D.; Rojo, Patricio; Girard, J. H.; Miller Ricci, E.; Fortney, J. J.; Minniti, D. (EDP, 2014)
      Context. GJ 1214 b is one of the few known transiting super-Earth-sized exoplanets with a measured mass and radius. It orbits an M-dwarf, only 14.55 pc away, making it a favorable candidate for follow-up studies. However, ...
    • The inner environment of Z Canis Majoris: High-contrast imaging polarimetry with NaCo 
      Canovas, H.; Pérez, Sebastián; Dougados, C.; de Boer, J.; Ménard, Francois; Casassus Montero, Simón; Schreiber, M. R.; Cieza, L. A.; Caceres, C.; Girard, J. H. (EDP SCIENCES, 2015)
      Context. Z CMa is a binary composed of an embedded Herbig Be and an FU Ori class star separated by ∼100 au. Observational evidence indicates a complex environment in which each star has a circumstellar disk and drives a ...
    • New constraints on the dust surrounding HR 4796A 
      Milli, J.; Mawet, D.; Pinte, Christophe; Lagrange, Anne Marie; Mouillet, D.; Girard, J. H.; Augereau, J. C.; Boer, J. de; Pueyo, L.; Choquet, É. (ESO, 2015)
      Context. HR 4796A is surrounded by a well-structured and very bright circumstellar disc shaped like an annulus with many interesting features: very sharp inner and outer edges, brightness asymmetries, centre offset, and ...
    • Probing the innermost region of the AU microscopii debris disc 
      Gallenne, Alexandre; Desgrange, C.; Milli, J.; Sánchez Bermúdez, J.; Chauvin, Gael; Kraus, S.; Girard, J. H.; Boccaletti, A. (EDP Sciences, 2022)
      Context. AU Mic is a young and nearby M-dwarf star harbouring a circumstellar debris disc and one recently discovered planet on an eight-day orbit. Large-scale structures within the disc were also discovered and are moving ...
    • Variability and dust filtration in the transition disk J160421.7-213028 observed in optical scattered light 
      Pinilla, P.; Boer, J. de; Benisty, Myriam; Juhász, A.; Ovelar, M. de Juan; Dominik, C.; Avenhaus, H.; Birnstiel, T.; Girard, J. H.; Huelamo, N.; Isella, A.; Milli, J. (EDP Sciences, 2015)
      Context. Protoplanetary disks around young stars are the birth-sites of planets. Spectral energy distributions and direct images of a subset of disks known as transition disks reveal dust-depleted inner cavities. Some of ...