157 citations · 2.4k across the 90 of their papers we have counts for
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On the morphology of the compact dust shell in the symbiotic system HM Sagittae
Stéphane Sacuto, Olivier Chesneau
The symbiotic system HM Sagittae consists of a Mira star and a secondary White Dwarf component. The dust content of the system was severely affected by the nova outburst in 1975, w…
Near-Infrared Studies of V1280 Sco (Nova Scorpii 2007)
Ramkrishna Das, Dipankar Banerjee, Nagarhalli Ashok +1
We present spectroscopic and photometric results of Nova V1280 Sco which was discovered in outburst in early 2007 February. The large number of spectra obtained of the object leads…
The origin of hydrogen line emission for five Herbig Ae/Be stars spatially resolved by VLTI/AMBER spectro-interferometry
S. Kraus, K. -H. Hofmann, M. Benisty +14
To trace the accretion and outflow processes around YSOs, diagnostic spectral lines such as the BrG 2.166 micron line are widely used, although due to a lack of spatial resolution,…
Wolf-Rayet stars probed by AMBER/VLTI
Florentin Millour, Olivier Chesneau, Thomas Driebe +5
Massive stars deeply influence their surroundings by their luminosity and the injection of kinetic energy. So far, they have mostly been studied with spatially unresolved observati…
MWC 297: a young high-mass star rotating at critical velocity
B. Acke, T. Verhoelst, M. E. van den Ancker +9
MWC 297 is a young massive nearby B[e] star. The central star has a large projected rotational velocity of 350 km/s. Despite the wealth of published observations, the nature of thi…
VLTI monitoring of the dust formation event of the Nova V1280 Sco
Olivier Chesneau, Dipankar Banerjee, F. Millour +13
We present the first high spatial resolution monitoring of the dust forming nova V1280 Sco performed with the Very Large Telescope Interferometer (VLTI). Spectra and visibilities w…
The close circumstellar environment of the semi-regular S-type star Pi^1 Gruis
Stéphane Sacuto, Alain Jorissen, Pierre Cruzalèbes +4
We study the close circumstellar environment of the nearby S-type star Pi^1 Gruis using high spatial-resolution, mid-infrared observations from the ESO/VLTI. Spectra and visibiliti…
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…
A disc in the heart of the Ant nebula
Foteini Lykou, Olivier Chesneau, Eric Lagadec +1
We present the discovery of a silicate disc at the centre of the planetary nebula Mz3 (the Ant). The nebula was observed with MIDI on the Very Large Telescope Interferometer (VLTI)…
A silicate disk in the heart of the Ant
Olivier Chesneau, Foteini Lykou, Bruce Balick +6
We aim at getting high spatial resolution information on the dusty core of bipolar planetary nebulae to directly constrain the shaping process. Methods: We present observations of…
The molecular and dusty composition of Betelgeuse's inner circumstellar environment
Guy Perrin, Tijl Verhoelst, Stephen T. Ridgway +6
The study of the atmosphere of red supergiant stars in general and of Betelgeuse (alpha Orionis) in particular is of prime importance to understand dust formation and how mass is l…
Near-infrared VLT adaptive optics imaging of evolved stars
Eric Lagadec, Olivier Chesneau, Albert A. Zijlstra +2
The high angular resolution and dynamic range achieved by the NACO adaptive optics system on the VLT is an excellent tool to study the morphology of Planetary Nebulae (PNe). We obs…
Mid-Infrared interferometry of dust around massive evolved stars
Jayadev Rajagopal, Jean-Luc Menut, D. Wallace +6
We report long-baseline interferometric measurements of circumstellar dust around massive evolved stars with the MIDI instrument on the Very Large Telescope Interferometer and prov…
A compact dust shell in the symbiotic system HM Sge
Stéphane Sacuto, Olivier Chesneau, Martin Vannier +1
We present high spatial resolution observations of the mid-infrared core of the dusty symbiotic system HM Sge. The MIDI interferometer was used with the VLT UTs and ATs providing b…
A snapshot of the inner dusty regions of a RCrB-type variable
I. C. Leao, Patrick De Laverny, O. Chesneau +2
R Coronae Borealis variable stars are suspected to sporadically eject optically thick dust clouds causing, when one of them lies on the line-of-sight, a huge brightness decline in…
A close look into the carbon disk at the core of the planetary nebula CPD-568032
Olivier Chesneau, Arnaud Collioud, Orsola De Marco +7
We present high spatial resolution observations of the dusty core of the Planetary Nebula with Wolf-Rayet central star CPD-568032. These observations were taken with the mid-infrar…
The compact circumstellar material around OH 231.8+4.2
M. Matsuura, O. Chesneau, A. A. Zijlstra +7
We have observed the bipolar post-AGB candidate OH 231.8+4.2, using the mid-infrared interferometer MIDI and the infrared camera with the adaptive optics system NACO on the Very La…
The vicinity of the galactic supergiant B[e] star CPD -57 2874 from near- and mid-IR long baseline spectro-interferometry with the VLTI (AMBER and MIDI)
A. Domiciano de Souza, T. Driebe, O. Chesneau +8
We present the first spectro-interferometric observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD -57 2874), performed with the Very Large Telescope Interfero…
VLTI/AMBER and VLTI/MIDI spectro-interferometric observations of the B[e] supergiant CPD-57 2874
A. Domiciano de Souza, T. Driebe, O. Chesneau +11
We present the first high spatial and spectral observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD), performed with the Very Large Telescope Interf…
Long Baseline Interferometry of Be Stars
Olivier Chesneau, Thomas Rivinius
We give an introduction to interferometrical concepts and their applicability to Be stars. The first part of the paper concentrates on a short historic overview and basic principle…
High spatial resolution study of the inner environment around two young planetary nebulae
Olivier Chesneau
We present observations of the dusty emission from the young planetary nebulae Hen2-113 and CPD-56 obtained with VLT/NACO, VLTI/MIDI. The central stars of these two objects are Wol…
Disk and wind interaction in the young stellar object MWC 297 spatially resolved with VLTI/AMBER
F. Malbet, M. Benisty, W. J. De Wit +15
The young stellar object MWC 297 has been observed with the VLT interferometer equipped with the AMBER instrument. MWC 297 has been spatially resolved in the continuum with a visib…
First AMBER/VLTI observations of hot massive stars
R. G. Petrov, F. Millour, O. Chesneau +45
AMBER is the first near infrared focal instrument of the VLTI. It combines three telescopes and produces spectrally resolved interferometric measures. This paper discusses some pre…
New insights on the complex planetary nebula Hen 2-113
Eric Lagadec, Olivier Chesneau, Mikako Matsuura +5
We report infrared observations of the planetary nebula Hen 2-113 obtained with VLT/NACO, VLTI/MIDI, VLT/ISAAC and TIMMI at the ESO 3.6m. Hen 2-113 exhibits a clear ring-like struc…