Browsing by Author "54a0db53-b266-4f2e-804c-b26537acaad1"

Now showing items 1-3 of 3

    • Discovery of a complex linearly polarized spectrum of Betelgeuse dominated by depolarization of the continuum 
      Aurière, M.; López Ariste, A.; Mathias, P.; Lèbre, A.; Josselin, E.; Montargès, M.; Petit, P.; Chiavassa, A.; Paletou, F.; Fabas, N.; Konstantinova Antova, R.; Donati, J. F.; Grunhut, J. H.; Wade, W. A.; Herpin, F.; Kervella, Pierre; Perrin, G.; Tessore, B (EDP Sciences, 2016)
      Context. Betelgeuse is an M supergiant that harbors spots and giant granules at its surface and presents linear polarization of its continuum. Aims. We have previously discovered linear polarization signatures associated ...
    • The close circumstellar environment of Betelgeuse IV. VLTI/PIONIER interferometric monitoring of the photosphere 
      Montargès, M.; Kervella, Pierre; Perrin, G.; Chiavassa, A.; Le Bouquin, J.-B.; Aurière, M.; López Ariste, A.; Mathias, P.; Ridgway, S. T.; Lacour, S.; Haubois, X.; Berger, J.-P. (ESO, 2016)
      Context. The mass-loss mechanism of cool massive evolved stars is poorly understood. The proximity of Betelgeuse makes it an appealing target to study its atmosphere, map the shape of its envelope, and follow the structure ...
    • VEGA/CHARA interferometric observations of Cepheids I. A resolved structure around the prototype classical ... 
      Nardetto, N.; Mérand, A.; Mourard, D.; Storm, J.; Gieren, W.; Fouqué, P.; Graczyk, D.; Kervella, P.; Neilson, H.; Pietrzynski, G.; Pilecki, B.; Breitfelder, J.; Berio, P.; Challouf, M.; Clausse, J.-M.; Ligi, R.; Mathias, P.; Meilland, A.; Perraut, K.; Poretti, E.; Rainer, M.; Spang, A.; Stee, P.; Tallon-Bosc, I.; Brummelaar, T. ten (EDP Sciences, 2016)
      Context. The B-W method is used to determine the distance of Cepheids and consists in combining the angular size variations of the star, as derived from infrared surface-brightness relations or interferometry, with its ...