157 citations · 2.4k across the 90 of their papers we have counts for
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Radiative hydrodynamics simulations of red supergiant stars. III. Spectro-photocentric variability, photometric variability, and consequences on Gaia measurements
A. Chiavassa, E. Pasquato, A. Jorissen +8
Context. It has been shown that convection in red supergiant stars gives rise to large granules causing surface inhomogeneities together with shock waves in the photosphere. The re…
Imaging the spinning gas and dust in the disc around the supergiant A[e] star HD62623
Florentin Millour, Anthony Meilland, Olivier Chesneau +5
Context. To progress in the understanding of evolution of massive stars one needs to constrain the mass-loss and determine the phenomenon responsible for the ejection of matter an…
A disk inside the bipolar planetary nebula M2-9
Foteini Lykou, Olivier Chesneau, Albert A. Zijlstra +4
Bipolarity in proto-planetary and planetary nebulae is associated with events occurring in or around their cores. Past infrared observations have revealed the presence of dusty str…
Imaging "Pinwheel"nebulae with optical long-baseline interferometry
Florentin Millour, Thomas Driebe, José Groh +4
Dusty Wolf-Rayet stars are few but remarkable in terms of dust production rates (up to one millionth of solar mass per year). Infrared excesses associated to mass-loss are found in…
Images of unclassified and supergiant B[e] stars disks with interferometry
Florentin Millour, Anthony Meilland, Olivier Chesneau +5
B[e] stars are among the most peculiar objects in the sky. This spectral type, characterised by allowed and forbidden emission lines, and a large infrared excess, does not represen…
The fundamental parameters of the roAp star Equulei
K. Perraut, I. Brandão, D. Mourard +18
Physical processes working in the stellar interiors as well as the evolution of stars depend on some fundamental stellar properties, such as mass, radius, luminosity, and chemical…
High spatial resolution monitoring of the activity of BA supergiant winds
Olivier Chesneau, Luc Dessart, A. Kaufer +4
There are currently two optical interferometry recombiners that can provide spectral resolutions better than 10000, AMBER/VLTI operating in the H-K bands, and VEGA/CHARA, recently…
An investigation of the close environment of beta Cep with the VEGA/CHARA interferometer
N. Nardetto, D. Mourard, I. Tallon-Bosc +22
High-precision interferometric measurements of pulsating stars help to characterize their close environment. In 1974, a close companion was discovered around the pulsating star bet…
Observations of dusty torii and compact disks around evolved stars: the high spatial resolution IR view
Olivier Chesneau
The recent high angular resolution observations have shown that the transition between a globally symmetrical giant and a source surrounded by a spatially complex environment occur…
Fast ray-tracing algorithm for circumstellar structures (FRACS). II. Disc parameters of the B[e] supergiant CPD-57° 2874 from VLTI/MIDI data
Armando Domiciano De Souza, Philippe Bendjoya, Gilles Niccolini +6
B[e] supergiants are luminous, massive post-main sequence stars exhibiting non-spherical winds, forbidden lines, and hot dust in a disc-like structure. The physical properties of t…
Mid-infrared interferometry of the massive young stellar object NGC3603 - IRS 9A
S. Vehoff, C. A. Hummel, J. D. Monnier +5
We present observations and models for one of these MYSO candidates, NGC3603 IRS 9A. Our goal is to investigate with infrared interferometry the structure of IRS 9A on scales as sm…
Building the 'JMMC Stellar Diameters Catalog' using SearchCal
Sylvain Lafrasse, Guillaume Mella, Daniel Bonneau +4
The JMMC Calibrator Workgroup has long developed methods to ascertain the angular diameter of stars, and provides this expertise in the SearchCal software. SearchCal dynamically fi…
Time, spatial, and spectral resolution of the Halpha line-formation region of Deneb and Rigel with the VEGA/CHARA interferometer
Olivier Chesneau, Luc Dessart, D. Mourard +22
BA-type supergiants are amongst the most optically-bright stars. They are observable in extragalactic environments, hence potential accurate distance indicators. Emission activity…
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…
Spectro-interferometric observations of interacting massive stars with VEGA/CHARA
Daniel Bonneau, Olivier Chesneau, Denis Mourard +1
We obtained spectro-interferometric observations in the visible of Lyrae and Sgr using the instrument VEGA of the CHARA interferometric array. For Lyrae, the dis…