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Deep near-infrared interferometric search for low-mass companions around beta Pictoris
Olivier Absil, Jean-Baptiste Le Bouquin, Jeremy Lebreton +6
Aims. We search for low-mass companions in the innermost region (<300 mas, i.e., 6 AU) of the beta Pic planetary system. Methods. We obtained interferometric closure phase measurem…
PIONIER: a visitor instrument for the VLTI
J. -P. Berger, G. Zins, B. Lazareff +35
PIONIER is a 4-telescope visitor instrument for the VLTI, planned to see its first fringes in 2010. It combines four ATs or four UTs using a pairwise ABCD integrated optics combine…
The 2008 Outburst in the Young Stellar System Z CMa: The First Detection of Twin Jets
Emma Whelan, Catherine Dougados, Marshall Perrin +11
The Z CMa binary is understood to undergo both FU Orionis (FUOR) and EX Orionis (EXOR) type outbursts. While the SE component has been spectro- scopically identified as an FUOR, th…
The 2008-2009 outburst of the young binary system Z CMa unraveled by interferometry with high spectral resolution
Fabien Malbet, Myriam Benisty, Catherine Dougados +7
Z CMa is a young binary system consisting of an Herbig primary and a FU Ori companion. Both components seem to be surrounded by active accretion disks and a jet was associated to t…
The 2008 outburst in the young stellar system ZCMa: I. Evidence of an enhanced bipolar wind on the AU-scale
M. Benisty, F. Malbet, C. Dougados +15
Accretion is a fundamental process in star formation. Although the time evolution of accretion remains a matter of debate, observations and modelling studies suggest that episodic…
The H line forming region of AB Aur spatially resolved at sub-AU with the VEGA/CHARA spectro-interferometer
K. Perraut, M. Benisty, D. Mourard +19
A crucial issue in star formation is to understand the physical mechanism by which mass is accreted onto and ejected by a young star. The visible spectrometer VEGA on the CHARA arr…