Publications (15)
Milli-arcsecond astrophysics with VSI, the VLTI spectro-imager in the ELT era
F. Malbet, D. Buscher, G. Weigelt +49
Nowadays, compact sources like surfaces of nearby stars, circumstellar environments of stars from early stages to the most evolved ones and surroundings of active galactic nuclei c…
Modal Filtering for Nulling Interferometry-First Single-Mode Conductive Waveguides in the Mid-Infrared
L. Labadie, P. Labeye, P. Kern +3
This paper presents the work achieved for the manufacturing and characterization of first single-mode waveguides to be used as modal filters for nulling interferometry in the mid-i…
First astronomical unit scale image of the GW Ori triple. Direct detection of a new stellar companion
J. -P. Berger, J. D. Monnier, R. Millan-Gabet +17
Young and close multiple systems are unique laboratories to probe the initial dynamical interactions between forming stellar systems and their dust and gas environment. Their study…
First results with the IOTA3 imaging interferometer: The spectroscopic binaries lambda Vir and WR 140
J. D. Monnier, W. Traub, F. P. Schloerb +26
We report the first spatially-resolved observations of the spectroscopic binaries lambda Vir and WR 140, which includes the debut of aperture-synthesis imaging with the upgraded th…
Mid-infrared laser light nulling experiment using single-mode conductive waveguides
L. Labadie, E. Le Coarer, R. Maurand +4
Aims: In the context of space interferometry missions devoted to the search of exo-Earths, this paper investigates the capabilities of new single mode conductive waveguides at prov…
A new interferometer architecture combining nulling with phase closure measurements
S. Lacour, P. Tuthill, J. D. Monnier +3
Imaging the direct light signal from a faint exoplanet against the overwhelming glare of its host star presents one of the fundamental challenges to modern astronomical instrumenta…
System overview of the VLTI Spectro-Imager
L. Jocou, J. P. Berger, F. Malbet +30
The VLTI Spectro Imager project aims to perform imaging with a temporal resolution of 1 night and with a maximum angular resolution of 1 milliarcsecond, making best use of the Very…
Technology challenges for space interferometry: the option of mid-infrared integrated optics
L. Labadie, P. Kern, P. Labeye +5
Nulling interferometry is a technique providing high angular resolution which is the core of the space missions Darwin and the Terrestrail Planet Finder. The first objective is to…
An integrated optics beam combiner for the second generation VLTI instruments
M. Benisty, J-P. Berger, L. Jocou +4
The very recent years have seen a promising start in scientific publications making use of images produced by near-infrared long-baseline interferometry. The technique has reached,…
VSI: the VLTI spectro-imager
F. Malbet, D. Buscher, G. Weigelt +51
The VLTI Spectro Imager (VSI) was proposed as a second-generation instrument of the Very Large Telescope Interferometer providing the ESO community with spectrally-resolved, near-i…
Few Skewed Disks Found in First Closure-Phase Survey of Herbig Ae/Be stars
J. D. Monnier, J. -P. Berger, R. Millan-Gabet +13
Using the 3-telescope IOTA interferometer on Mt. Hopkins, we report results from the first near-infrared (lambda=1.65 mu) closure-phase survey of Young Stellar Objects (YSOs). Thes…
Infrared Imaging of Capella with the IOTA Closure Phase Interferometer
S. Kraus, F. P. Schloerb, W. A. Traub +11
We present infrared aperture synthesis maps produced with the upgraded IOTA interferometer. Michelson interferograms on the close binary system Capella (Alpha Aur) were obtained in…
Bright Localized Near-Infrared Emission at 1-4 AU in the AB Aurigae Disk Revealed by IOTA Closure Phases
R. Millan-Gabet, J. D. Monnier, J. -P. Berger +13
We report on the detection of localized off-center emission at 1-4 AU in the circumstellar environment of the young stellar object AB Aurigae. We used closure phase measurements in…
PIONIER: a 4-telescope visitor instrument at VLTI
Jean-Baptiste Le Bouquin, J. -P. Berger, B. Lazareff +43
PIONIER stands for Precision Integrated-Optics Near-infrared Imaging ExpeRiment. It combines four 1.8m Auxilliary Telescopes or four 8m Unit Telescopes of the Very Large Telescope…
First Surface-resolved Results with the IOTA Imaging Interferometer: Detection of Asymmetries in AGB stars
S. Ragland, W. A. Traub, J. -P. Berger +20
We have measured non-zero closure phases for about 29% of our sample of 56 nearby Asymptotic Giant Branch (AGB) stars, using the 3-telescope Infrared Optical Telescope Array (IOTA)…