Browsing by Author "1f5dc074-cd59-4f80-a548-e20614c5733f"

Now showing items 1-15 of 15

    • Accretion-ejection morphology of the microquasar SS 433 resolved at sub-au scale 
      Petrucci, P. O.; Waisberg, I.; Le Bouquin, J. B.; Kervella, P. (EDP Sciences, 2017)
      We present the first optical observation of the microquasar SS 433 at sub-milliarcsecond (mas) scale obtained with the GRAVITY instrument on the Very Large Telescope interferometer (VLTI). The 3.5-h exposure reveals a rich ...
    • An updated 2017 astrometric solution for betelgeuse 
      Harper, G. M.; Brown, A.; Guinan, E. F.; O’Gorman, E.; Richards, A. M. S.; Kervella, P.; Decin, L. (IOP Publishing, 2017)
      We provide an update for the astrometric solution for the Type II supernova progenitor Betelgeuse using the revised Hipparcos Intermediate Astrometric Data (HIAD) of van Leeuwen, combined with existing VLA and new e-MERLIN ...
    • Calibrating the surface brightness – color relation for late-type red giants stars in the visible domain ... 
      Nardetto, N.; Salsi, A.; Mourard, D.; Hocdé, V.; Perraut, K.; Gallenne, A.; Mérand, A.; Graczyk, D.; Pietrzynski, G.; Gieren, W.; Kervella, P.; Ligi, R.; Meilland, A.; Morand, F.; Stee, P.; Tallon-Bosc, I.; Brummelaar, T. ten (EDP Science, 2020)
      Context. The surface brightness - color relationship (SBCR) is a poweful tool for determining the angular diameter of stars from photometry. It was for instance used to derive the distance of eclipsing binaries in the Large ...
    • First light for GRAVITY: phase referencing optical interferometry for the very large Telescope Interferometer 
      Abuter, R.; Accardo, M.; Amorim, A.; Kervella, P. (EDP Sciences, 2017)
      GRAVITY is a new instrument to coherently combine the light of the European Southern Observatory Very Large Telescope Interferometer to form a telescope with an equivalent 130m diameter angular resolution and a collecting ...
    • Physical, spectral, and dynamical properties of asteroid (107) Camilla and its satellites 
      Pajuelo, M.; Kervella, P. (Elsevier, 2018-07-15)
      The population of large 100+ km asteroids is thought to be primordial. As such, they are the most direct witnesses of the early history of our Solar System available. Those among them with satellites allow study of the ...
    • Searching for the near-infrared counterpart of Proxima c using multi-epoch high-contrast SPHERE data at VLT 
      Gratton, R.; Zurlo, A.; Le Coroller, H.; Damasso, M.; Sordo, F. del; Langlois, M.; Mesa, D.; Milli, J.; Chauvin, Gaël; Desidera, S.; Hagelberg, J.; Lagadec, E.; Vigan, A.; Boccaletti, A.; Bonnefoy, M.; Brandner, W.; Brown, S.; Cantalloube, F.; Delorme, P.; Orazi, V. D.; Feldt, M.; Galicher, R.; Henning, T.; Janson, M.; Kervella, P.; Lagrange, A. M; Lazzoni, C.; Ligi, R.; Ligi, A. L.; Ménard, F.; Meyer, M.; Mugnier, L.; Potier, A.; Rickman, E. L; Rodet, L.; Romero, C.; Schmidt, T.; Sissa, E.; Sozzetti, A.; Szulágyi, J.; Wahhaj, Z.; Antichi, J.; Fusco, T.; Stadler, E.; González Suárez, M.; Wildi, F. (EDP Science, 2020)
      Context. Proxima Centauri is the closest star to the Sun and it is known to host an Earth-like planet in its habitable zone; very recently a second candidate planet was proposed based on radial velocities. At quadrature, ...
    • Size and shape of chariklo from multi epoch stellar occultations 
      Leiva, R.; Sicardy, B.; Camargo, J. I. B.; Kervella, P. (IOP Publishing Ltd, 2017)
      We use data from five stellar occultations observed between 2013 and 2016 to constrain Chariklo's size and shape, and the ring reflectivity. We consider four possible models for Chariklo (sphere, Maclaurin spheroid, triaxial ...
    • Submilliarcsecond optical interferometry of the high-mass X-Ray binary BP Cru with VLTI/GRAVITY 
      Waisberg, I.; Dexter, J.; Pfuhl, O.; Kervella, P. (IOP Publishing Ltd, 2017)
      We observe the high-mass X-ray binary (HMXB) BP Cru using interferometry in the near-infrared K band with VLTI/GRAVITY. Continuum visibilities are at most partially resolved, consistent with the predicted size of the ...
    • The convective surface of the red supergiant Antares VLTI/PIONIER interferometry in the near infrared 
      Montarges, M.; Chiavassa, A.; Kervella, P.; Ridgway, S. T.; Perrin, G.; Le Bouquin, J. B.; Lacour, S. (EDP Sciences, 2017)
      Context. Convection is a candidate to explain the trigger of red supergiant star (RSG) mass loss. Owing to the small size of the convective cells on the photosphere, few of the characteristics of RSGs are known. Aims. ...
    • The GRAVITY young stellar object survey: III. The dusty disk of RY Lup 
      Bouarour, Y. -I.; Perraut, K.; Ménard, F.; Brandner, W.; Caratti o Garatti, A.; Caselli, P.; Van Dishoeck, E.; Dougados, C.; García López, R.; Grellmann, R.; Henning, T.; Klarmann, L.; Labadie, L.; Natta, A.; Sánchez Bermúdez, J.; Thi, W. -F.; De Zeeuw, P. T.; Amorim, A.; Baubock, M.; Benisty, M.; Berger, J. -P.; Clenet, Y.; Du Foresto, V. Coudé; Duvert, G.; Eckart, A.; Eisenhauer, F.; Eupen, F.; Filho, M.; Gao, F.; García, P.; Gendron, E.; Genzel, R.; Gillessen, S.; Jiménez Rosales, A.; Jocou, L.; Hippler, S.; Horrobin, M.; Hubert, Z.; Kervella, P.; Lacour, S.; Le Bouquin, J. -B.; Léna, P.; Ott, T.; Paumard, T.; Perrin, G.; Pfuhl, O.; Rousset, G.; Scheithauer, S.; Shangguan, J.; Stadler, J.; Straub, O.; Straubmeier, C.; Sturm, E.; Vincent, F. H.; Von Fellenberg, S. D.; Widmann, F.; Wiest, M. (EDP Sciences, 2020)
      Context. Studies of the dust distribution, composition, and evolution of protoplanetary disks provide clues for understanding planet formation. However, little is known about the innermost regions of disks where telluric ...
    • The inhomogeneous submillimeter atmosphere of Betelgeuse 
      O'Gorman, E.; Kervella, P.; Harper, G. M.; Richards, A. M. S.; Decin, L.; Montarges, M.; McDonald, I. (EDP Sciences, 2017)
      The mechanisms responsible for heating the extended atmospheres of early-M spectral-type supergiants are poorly understood. So too is the subsequent role these mechanisms play in driving the large mass-loss rates of these ...
    • The red dwarf pair GJ65 AB: inflated, spinning twins of Proxima Fundamental parameters from PIONIER, NACO, ... 
      Kervella, P.; Mérand, A.; Ledoux, C.; Demory, B.-O.; Le Bouquin, J.-B. (EDP Sciences, 2016)
      The nearby red dwarf binary GJ65 AB (UV + BL Ceti, M5.5Ve + M6Ve) is a cornerstone system to probe the physics of very low-mass stars. The radii of the two stars are currently known only from indirect photometric estimates, ...
    • The structure of Chariklo's rings from stellar occultations 
      Berard, D.; Sicardy, B.; Camargo, J. I. B.; Kervella, P. (IOP Publishing Ltd, 2017)
      Two narrow and dense rings (called C1R and C2R) were discovered around the Centaur object (10199) Chariklo during a stellar occultation observed on 2013 June 3. Following this discovery, we planned observations of several ...
    • Unveiling the beta pictoris system, coupling high contrast imaging, interferometric, and radial velocity data 
      Lagrange, A. M; Rubini, P.; Nowak, M.; Lacour, S.; Grandjean, A.; Boccaletti, A.; Langlois, M.; Delorme, P.; Gratton, R.; Wang, J.; Flasseur, O.; Galicher, R.; Kral, Q.; Meunier, N.; Beust, H.; Babusiaux, C.; Le Coroller, H.; Thebault, P.; Kervella, P.; Zurlo, A.; Maire, A.-L.; Wahhaj, Z.; Amorim, A.; Asensio-Torres, Rubén; Benisty, M.; Berger, J.-P.; Bonnefoy, M.; Brandner, W.; Cantalloube, F.; Charnay, B.; Chauvin, G.; Choquet, É.; Clenet, Y.; Christiaens, V.; Coude du Foresto, V.; de Zeeuw, P.T.; Desidera, S.; Duvert, G.; Eckart, A.; Eisenhauer, F.; Galland, F.; Gao, F.; Garcia, P.; García López, R.; Gendron, E.; Genzel, R.; Gillessen, S.; Girard, J.; Hagelberg, J.; Haubois, X.; Henning, T.; Heissel, G.; Hippler, S.; Horrobin, M.; Janson, M.; Kammerer, J.; Kenworthy, M.; Keppler, M.; Kreidberg, L.; Lapeyrere, V.; Le Bouquin, J.-B.; Lena, P.; Merand, A.; Messina, S.; Molliere, P.; Monnier, J. D.; Ott, T.; Otten, G.; Paumard, T.; Paladini, C.; Perraut, K.; Perrin, G.; Pueyo, L.; Pfuhl, O.; Rodet, L.; Rodríguez Coira, G.; Rousset, G.; Samland, M.; Shangguan, J.; Schmidt, T.; Straub, O.; Straubmeier, C.; Stolker, T.; Vigan, A.; Vincent, F.; Widmann, F.; Woillez, J. (EDP Science, 2020)
      Context. The nearby and young beta Pictoris system hosts a well resolved disk, a directly imaged massive giant planet orbiting at similar or equal to 9 au, as well as an inner planet orbiting at similar or equal to 2.7 au, ...
    • 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 ...