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Intricate visibility effects from resolved emission of young stellar objects: the case of MWC158 observed with the VLTI
Jacques Kluska, Fabien Malbet, Jean-Philippe Berger +7
In the course of our VLTI young stellar object PIONIER imaging program, we have identified a strong visibility chromatic dependency that appeared in certain sources. This effect, r…
PIONIER: a status report
J. -B. Le Bouquin, J. -P. Berger, G. Zins +33
The visitor instrument PIONIER provides VLTI with improved imaging capabilities and sensitivity. The instrument started routinely delivering scientific data in November 2010, that…
Imaging the heart of astrophysical objects with optical long-baseline interferometry
J. -P. Berger, F. Malbet, F. Baron +21
The number of publications of aperture-synthesis images based on optical long-baseline interferometry measurements has recently increased due to easier access to visible and infrar…
On the sensitivity of closure phases to faint companions in optical long baseline interferometry
Jean-Baptiste Le Bouquin, Olivier Absil
We explore the sensitivity and completeness of long baseline interferometric observations for detecting unknown, faint companions around bright unresolved stars. We derive a linear…
The long period eccentric orbit of the particle accelerator HD167971 revealed by long baseline interferometry
M. De Becker, H. Sana, O. Absil +2
Using optical long baseline interferometry, we resolved for the first time the two wide components of HD167971, a candidate hierarchical triple system known to efficiently accelera…
New activity in the large circumstellar disk of the Be-shell star 48 Lib
S. Stefl, J. -B. Le Bouquin, A. C. Carciofi +3
Spectroscopic, polarimetric, and high spectral resolution interferometric data covering the period 1995-2011 are analyzed to document the transition into a new phase of circumstell…