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Multiplicity of Galactic Cepheids from long-baseline interferometry. II. The Companion of AX Circini revealed with VLTI/PIONIER
A. Gallenne, A. Mérand, P. Kervella +6
Aims: We aim at detecting and characterizing the main-sequence companion of the Cepheid AX Cir ( 18 yrs). The long-term objective is to estimate the mass of b…
The close environment of high-mass X-ray binaries at high angular resolution I. VLTI/AMBER and VLTI/PIONIER near-infrared interferometric observations of Vela X-1
E. Choquet, P. Kervella, J. -B. Le Bouquin +7
Recent improvements on the sensitivity and spectral resolution of X-ray observations have led to a better understanding of the properties of matter in the vicinity of High Mass X-r…
Enhanced Halpha activity at periastron in the young and massive spectroscopic binary HD200775
M. Benisty, K. Perraut, D. Mourard +15
Young close binaries clear central cavities in their surrounding circumbinary disk from which the stars can still accrete material. This process takes place within the very first a…
Three-dimensional orbits of the triple-O stellar system HD 150136
H. Sana, J. -B. Le Bouquin, L. Mahy +3
Context. HD 150136 is a triple hierarchical system and a non-thermal radio emitter. It is formed by an O3-3.5 V + O5.5-6 V close binary and a more distant O6.5-7 V tertiary. So far…
Masses and age of the Chemically Peculiar double-lined binary ~Lupi
Jean-Baptiste Le Bouquin, Herve Beust, Gilles Duvert +3
We aim at measuring the stellar parameters of the two Chemically Peculiar components of the B9.5Vp HgMn + A2 Vm double-lined spectroscopic binary HD141556, whose period is 15.25 da…
Sculpting the disk around T Cha: an interferometric view
Johan Olofsson, Myriam Benisty, Jean-Baptiste Le Bouquin +13
(Abridged) Circumstellar disks are believed to be the birthplace of planets and are expected to dissipate on a timescale of a few Myr. The processes responsible for the removal of…