216 citations · 797 across the 33 of their papers we have counts for
24 papers · 1 filter
Interferometric Survey of Stellar Parameters: Mass of the metallic A-type binary Aur
J. Jonák, D. Mourard, J. D. Monnier +23
With the capabilities of the new visible CHARA/SPICA instrument and the multiple spectral band operation of CHARA, our goal is to resolve orbits of short-period binaries and develo…
Interferometric Survey of Stellar Parameters: Towards homogeneous FGK stars parameters and surface-brightness color relation in the context of PLATO space mission
Romina V. Ibañez Bustos, Denis Mourard, Nicolas Nardetto +20
The estimation of stellar angular diameters can be performed from the surface brightness - color relation (SBCR) and photometry. The SBCR have been considered by the PLATO space mi…
Bayesian sampling with BeAtlas, a grid of synthetic Be star spectra I. Recovering the fundamental parameters of αEri and βCMi
A. C. Rubio, A. C. Carciofi, P. Ticiani +14
Classical Be stars are fast rotating, near main sequence B-type stars. The rotation and the presence of circumstellar discs profoundly modify the observables of active Be stars. Ou…
Spectroscopic detection of Altair's non-radial pulsations
M. Rieutord, P. Petit, D. Reese +4
Context: Rapid rotation is a common feature of early-type stars but which remains a challenge for the models. The understanding of its effect on stellar evolution is however impera…
The binary system of the spinning-top Be star Achernar
P. Kervella, S. Borgniet, A. Domiciano de Souza +16
Achernar, the closest and brightest classical Be star, presents rotational flattening, gravity darkening, occasional emission lines due to a gaseous disk, and an extended polar win…
Combined spectroscopy and intensity interferometry to determine the distances of the blue supergiants P Cygni and Rigel
E. S. G. de Almeida, Mathilde Hugbart, Armando Domiciano de Souza +10
In this paper we report on spatial intensity interferometry measurements within the H line on two stars: the Luminous Blue Variable supergiant \PCygni\,and the late-type B super…
The extended atmosphere and circumstellar environment of the cool evolved star VX Sagittarii as seen by MATISSE
A. Chiavassa, K. Kravchenko, M. Montargès +50
Context. VX Sgr is a cool, evolved, and luminous red star whose stellar parameters are difficult to determine, which affects its classification. Aims. We aim to spatially resolve t…
VLTI-MATISSE L- and N-band aperture-synthesis imaging of the unclassified B[e] star FS Canis Majoris
K. -H. Hofmann, A. Bensberg, D. Schertl +58
Context: FS Canis Majoris (FS CMa, HD 45677) is an unclassified B[e] star surrounded by an inclined dust disk. The evolutionary stage of FS CMa is still debated. Perpendicular to t…
Refined fundamental parameters of Canopus from combined near-IR interferometry and spectral energy distribution
A. Domiciano de Souza, J. Zorec, F. Millour +3
Canopus, the brightest and closest yellow supergiant to our Solar System, offers a unique laboratory for understanding the physics of evolved massive stars. The accurate and precis…
Prevalence of SED turndown among classical Be stars: Are all Be stars close binaries?
Robert Klement, A. C. Carciofi, T. Rivinius +16
Rapid rotation is a fundamental characteristic of classical Be stars and a crucial property allowing for the formation of their circumstellar disks. Past evolution in a mass and an…
The evolved fast rotator Sargas. Stellar parameters and evolutionary status from VLTI/PIONIER and VLT/UVES
Armando Domiciano de Souza, Kévin Bouchaud, Michel Rieutord +2
Gravity darkening (GD) and flattening are important consequences of stellar rotation. The precise characterization of these effects across the HRD is crucial to a deeper understand…
Gravity darkening in stars with surface differential rotation
J. Zorec, M. Rieutord, F. Espinosa Lara +3
The interpretation of stellar apparent fundamental parameters must be treated consistently with the characteristics of their surface rotation law. We develop a model to determine t…
VLTI/PIONIER images the Achernar disk swell
G. Dalla Vedova, F. Millour, A. Domiciano de Souza +5
Context. The mechanism of disk formation around fast-rotating Be stars is not well understood. In particular, it is not clear which mechanisms operate, in addition to fast rotation…
Critical study of the distribution of rotational velocities of Be stars; II: Differential rotation and some hidden effects interfering with the interpretation of the Vsin i parameter
J. Zorec, Y. Frémat, A. Domiciano de Souza +9
We assume that stars may undergo surface differential rotation to study its impact on the interpretation of and on the observed distribution of ratios of true ro…
Grown-up stars physics with MATISSE
Florentin Millour, J Hron, A Chiavassa +20
MATISSE represents a great opportunity to image the environment around massive and evolved stars. This will allow one to put constraints on the circumstellar structure, on the mass…
Differential interferometric phases at high spectral resolution as a sensitive physical diagnostic of circumstellar disks
D. M. Faes, A. C. Carciofi, Th. Rivinius +3
Context. The circumstellar disks ejected by many rapidly rotating B stars (so-called Be stars) offer the rare opportunity of studying the structure and dynamics of gaseous disks at…
AMBER/VLTI observations of the B[e] star MWC 300
Y. Wang, G. Weigelt, A. Kreplin +8
Aims. We study the enigmatic B[e] star MWC 300 to investigate its disk and binary with milli-arcsecond-scale angular resolution. Methods. We observed MWC 300 with the VLTI/AMBER in…
The galactic unclassified B[e] star HD 50138. II. Interferometric constraints on the close circumstellar environment
Marcelo Borges Fernandes, Anthony Meilland, Philippe Bendjoya +7
HD 50138 is a southern star that presents the B[e] phenomenon, but its evolutionary stage is still not well known. This object presents spectral variability, which can be explained…
Differential rotation in rapidly rotating early-type stars. I. Motivations for combined spectroscopic and interferometric studies
J. Zorec, Y. Fremat, A. Domiciano de Souza +7
Since the external regions of the envelopes of rapidly rotating early-type stars are unstable to convection, a coupling may exist between the convection and the internal rotation.…
Fast ray-tracing algorithm for circumstellar structures (FRACS) I. Algorithm description and parameter-space study for mid-IR interferometry of B[e] stars
Gilles Niccolini, Philippe Bendjoya, Armando Domiciano De Souza
The physical interpretation of spectro-interferometric data is strongly model-dependent. On one hand, models involving elaborate radiative transfer solvers are too time consuming i…
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…
The galactic unclassified B[e] star HD 50138. I. A possible new shell phase
Marcelo Borges Fernandes, Michaela Kraus, Olivier Chesneau +4
The observed spectral variation of HD 50138 has led different authors to classify it in a very wide range of spectral types and luminosity classes (from B5 to A0 and III to Ia) and…
Halpha spectropolarimetry of the B[e] supergiant GG Carinae
A. Pereyra, F. X. de Araujo, A. M. Magalhaes +2
Aims. We study the geometry of the circumstellar environment of the B[e] supergiant star GG Car. Methods. We present observations acquired using the IAGPOL imaging polarimeter in c…
A binary engine fuelling HD87643' s complex circumstellar environment, using AMBER/VLTI
Florentin Millour, Olivier Chesneau, Marcelo Borges Fernandes +19
Context. The star HD 87643, exhibiting the "B[e] phenomenon", has one of the most extreme infrared excesses for this object class. It harbours a large amount of both hot and cold d…