Browsing by Author "Gallenne, A."

Now showing items 1-7 of 7

    • The Araucaria Project: High-precision orbital parallax and masses of the eclipsing binary TZ Fornacis 
      Gallenne, A.; Pietrzynski, G.; Graczyk, D.; Konorski, P.; Kervella, Pierre; Merand, A.; Gieren, W.; Anderson, R.; Villanova, S. (EDP SCIENCES, 2016)
      Context. Independent distance estimates are particularly useful to check the precision of other distance indicators, while accurate and precise masses are necessary to constrain evolution models. Aims. The goal is to ...
    • Cepheid distances from the SpectroPhoto-Interferometry of Pulsating Stars (SPIPS) Application to the ... 
      Mérand, A.; Kervella, Pierre; Breitfelder, J.; Gallenne, A.; Coudé du Foresto, V.; Brummelaar, T. A. ten; McAlister, H. A.; Ridgway, S.; Sturmann, L.; Sturmann, J.; Turner, N. H. (EDP Sciences, 2015)
      Context. The parallax of pulsation, and its implementations such as the Baade-Wesselink method and the infrared surface brightness technique, is an elegant method to determine distances of pulsating stars in a quasi-geometrical ...
    • The close circumstellar environment of Betelgeuse III. SPHERE/ZIMPOL imaging polarimetry in the visible 
      Kervella, Pierre; Lagadec, E.; Montarges, M.; Ridgway, S.; Chiavassa, A.; Haubois, X.; Schmid, H.; Langlois, M.; Gallenne, A.; Perrin, G. (EDP SCIENCES, 2016)
      The physical mechanism through which the outgoing material of massive red supergiants is accelerated above the escape velocity is unclear. Thanks to the transparency of its circumstellar envelope, the nearby red supergiant ...
    • 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 ...
    • Investigating Cepheid l Carinae' s cycle-to-cycle variations via contemporaneous velocimetry and ... 
      Anderson, R. I.; Mérand, A.; Kervella, Pierre; Breitfelder, J.; Le Bouquin, J. B.; Eyer, L.; Gallenne, A.; Palaversa, L.; Semaan, T.; Saesen, S.; Mowlavi, N. (Oxford University Press, 2016)
      Baade-Wesselink-type (BW) techniques enable geometric distance measurements of Cepheid variable stars in the Galaxy and the Magellanic clouds. The leading uncertainties involved concern projection factors required to ...
    • Observational calibration of the projection factor of Cepheids 
      Breitfelder, J.; Kervella, Pierre; Mérand, A.; Gallenne, A.; Szabados, L.; Anderson, R. I.; Willson, M.; Le Bouquin, J.-B. (EDP SCIENCES, 2015)
      Context. The distance of pulsating stars, in particular Cepheids, are commonly measured using the parallax of pulsation technique. The different versions of this technique combine measurements of the linear diameter variation ...
    • Robust high-contrast companion detection from interferometric observations. The CANDID algorithm and an ... 
      Gallenne, A.; Mérand, A.; Kervella, Pierre; Monnier, J. D.; Schaefer, G. H.; Baron, F.; Breitfelder, J.; Le Bouquin, J. B.; Roettenbacher, R. M.; Gieren, W.; Pietrzynski, G.; McAlister, H.; Brummelaar, T. ten; Sturmann, J.; Sturmann, L.; Turner, N.; Ridgway, S.; Kraus, S. (EDP Sciences, 2015)
      Context. Long-baseline interferometry is an important technique to spatially resolve binary or multiple systems in close orbits. By combining several telescopes together and spectrally dispersing the light, it is possible ...