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Resolving the dusty circumstellar environment of the A[e] supergiant HD 62623 with the VLTI/MIDI
A. Meilland, S. Kanaan, M. Borges Fernandes +4
B[e] stars are hot stars surrounded by circumstellar gas and dust responsible for the presence of emission lines and IR-excess in their spectra. How dust can be formed in this high…
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…
B[e] stars at the highest angular resolution: the case of HD87643
Florentin Millour, Olivier Chesneau, Marcelo Borges Fernandes +1
New results on the B[e] star HD87643 are presented here. They were obtained with a wide range of different instruments, from wide-field imaging with the WFI camera, high resolution…
VLTI/AMBER unveils a possible dusty pinwheel nebula in WR118
Florentin Millour, Thomas Driebe, Olivier Chesneau +6
Most Wolf-Rayet stars (WR) of WC9 sub-type exhibit a dusty circumstellar envelope, but it is still a matter of debate how dust can form in their harsh environment. In a few cases,…
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…
Catching the Binaries Amongst B[e] Stars
Michaela Kraus, Marcelo Borges Fernandes, Olivier Chesneau
It is surprising to find dust around B type stars, as in the case of B[e] stars. These stars exhibit a dense, dusty environment witnessed by their infrared-excess and many emission…
VLTI/MIDI observations of 7 classical Be stars
Anthony Meilland, Philippe Stee, Olivier Chesneau +1
We measured the mid-infrared extension of the gaseous disk surrounding seven Be stars in order to constrain the geometry of their circumstellar environments and to try to infer phy…
Mid-infrared interferometry of massive young stellar objects. I. VLTI and Subaru observations of the enigmatic object M8E-IR
H. Linz, Th. Henning, M. Feldt +10
[abridged] Our knowledge of the inner structure of embedded massive young stellar objects is still quite limited. We attempt here to overcome the spatial resolution limitations of…