157 citations · 2.4k across the 90 of their papers we have counts for
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Image modeling of compact starburst clusters: I. R136
Zeinab Khorrami, Farrokh Vakili, Olivier Chesneau
Continuous progress in data quality from HST, recent multiwavelength high resolution spectroscopy and high contrast imaging from ground adaptive optics on large telescopes need mod…
Pseudomagnitudes and Differential Surface Brightness: Application to the apparent diameter of stars
Alain Chelli, Gilles Duvert, Laurent Bourgès +4
The diameter of a star is a major observable that serves to test the validity of stellar structure theories. It is also a difficult observable that is mostly obtained with indirect…
VLT/SPHERE deep insight of NGC 3603's core: Segregation or confusion?
Z. Khorrami, T. Lanz, F. Vakili +19
We present new near-infrared photometric measurements of the core of the young massive cluster NGC 3603 obtained with extreme adaptive optics. The data were obtained with the SPHER…
Observations of binaries in AGB, post-AGB stars and Planetary Nebulae
Eric Lagadec, Olivier Chesneau
During the last years, many observational studies have revealed that binaries play an active role in the shaping of non spherical planetary nebulae. We review the different works t…
Improving the surface brightness-color relation for early-type stars using optical interferometry
M. Challouf, N. Nardetto, D. Mourard +18
The aim of this work is to improve the SBC relation for early-type stars in the color domain, using optical interferometry. Observations of eight B- and A-type…
The RCB star V854 Cen is surrounded by a hot dusty shell
Olivier Chesneau, Florentin Millour, Orsola De Marco +5
Aims : The hydrogen-deficient supergiants known as R Coronae Borealis (RCB) stars might be the result of a double-degenerate merger of two white dwarfs (WDs), or a final helium she…
V838 Monocerotis: the central star and its environment a decade after outburst
Olivier Chesneau, Florentin Millour, Orsola De Marco +8
Aims. V838 Monocerotis erupted in 2002, brightened in a series of outbursts, and eventually developed a spectacular light echo. A very red star emerged a few months after the outbu…
Optical interferometry and adaptive optics of bright transients
Florentin Millour, Olivier Chesneau, Anthony Meilland +1
Bright optical transients (i.e. transients typically visible with the naked eye) are populated mainly by novae eruptions plus a few supernovae (among which the SN1987a event). One…
The variable stellar wind of Rigel probed at high spatial and spectral resolution
O. Chesneau, A. Kaufer, O. Stahl +5
We present a spatially resolved, high-spectral resolution (R=12000) K-band temporal monitoring of Rigel using AMBER at the VLTI. Rigel was observed in the Bracket Gamma line and it…
An edge-on translucent dust disk around the nearest AGB star L2 Puppis - VLT/NACO spectro-imaging from 1.04 to 4.05 microns and VLTI interferometry
Pierre Kervella, Miguel Montargès, Stephen T. Ridgway +6
As the nearest known AGB star (d=64pc) and one of the brightest (mK-2), L2 Pup is a particularly interesting benchmark object to monitor the final stages of stellar evolution. We r…
The yellow hypergiant HR 5171 A: Resolving a massive interacting binary in the common envelope phase
O. Chesneau, A. Meilland, E. Chapellier +20
We initiated long-term optical interferometry monitoring of the diameters of unstable yellow hypergiants (YHG) with the goal of detecting both the long-term evolution of their radi…
The fundamental parameters of the roAp star 10 Aql
K. Perraut, S. Borgniet, M. Cunha +12
Due to the strong magnetic field and related abnormal surface layers existing in rapidly oscillating Ap stars, systematic errors are likely to be present when determining their eff…
Extended envelopes around Galactic Cepheids IV. T Monocerotis and X Sagittarii from mid-infrared interferometry with VLTI/MIDI
A. Gallenne, A. Merand, P. Kervella +3
Aims. We study the close environment of nearby Cepheids using high spatial resolution observations in the mid-infrared with the VLTI/MIDI instrument, a two-beam interferometric rec…
An interferometric study of the post-AGB binary 89 Herculis I Spatially resolving the continuum circumstellar environment at optical and near-IR wavelengths with the VLTI, NPOI, IOTA, PTI, and the CHARA Array
M. Hillen, T. Verhoelst, H. Van Winckel +9
Binary post-AGB stars are interesting laboratories to study both the evolution of binaries as well as the structure of circumstellar disks. A multiwavelength high angular resolutio…
Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER
P. Cruzalèbes, A. Jorissen, Y. Rabbia +7
Thanks to their large angular dimension and brightness, red giants and supergiants are privileged targets for optical long-baseline interferometers. Sixteen red giants and supergia…
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…
Evolution of the 1919 Ejecta of V605 Aquilae
Geoffrey C. Clayton, Howard E. Bond, Lindsey A. Long +7
New imaging of V605 Aql, was obtained in 2009 with HST/WFPC2, which had a nova-like outburst in 1919, and is located at the center of the planetary nebula (PN), Abell 58. This even…
The H-band Emitting Region of the Luminous Blue Variable P Cygni: Spectrophotometry and Interferometry of the Wind
N. D. Richardson, G. H. Schaefer, D. R. Gies +20
We present the first high angular resolution observations in the nearinfrared H-band (1.6 microns) of the Luminous Blue Variable star P Cygni. We obtained six-telescope interferome…
Stars with the B[e] phenomenon seen by long baseline interferometry
Marcelo Borges Fernandes, Olivier Chesneau, Michaela Kraus +11
Thanks to the high spatial resolution provided by long baseline interferometry, it is possible to understand the complex circumstellar geometry around stars with the B[e] phenomeno…
Interferometric studies of novae in the infrared
Olivier Chesneau, D. P. K. Banerjee
The Interferometric studies of novae in the optical and near-infrared is a nascent but fast emerging field which has begun to provide new and invaluable insights into the nova phen…
The expanding dusty bipolar nebula around the nova V1280 Sco
Olivier Chesneau, E. Lagadec, M. Otulakowska-Hypka +15
V1280 Sco is one of the slowest dust-forming nova ever historically observed. We performed multi-epoch high-spatial resolution observations of the circumstellar dusty environment o…
Two short mass-loss events that unveil the binary heart of Minkowski's Butterfly Nebula
A. Castro-Carrizo, R. Neri, V. Bujarrabal +3
Studying the appearance and properties of bipolar winds is critical to understand the stellar evolution from the AGB to the planetary nebula (PN) phase. Many uncertainties exist re…
Interactions in massive binary stars as seen by interferometry
Florentin Millour, Anthony Meilland, Philippe Stee +1
With the advent of large-collecting-area instruments, the number of objects that can be reached by optical long-baseline interferometry is steadily increasing. We present here a fe…
The diameter of the CoRoT target HD 49933. Combining the 3D limb darkening, asteroseismology, and interferometry
L. Bigot, D. Mourard, P. Berio +21
Context. The interpretation of stellar pulsations in terms of internal structure depends on the knowledge of the fundamental stellar parameters. Long-base interferometers permit us…