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Reaching micro-arcsecond astrometry with long baseline optical interferometry; application to the GRAVITY instrument
S. Lacour, F. Eisenhauer, S. Gillessen +10
A basic principle of long baseline interferometry is that an optical path difference (OPD) directly translates into an astrometric measurement. In the simplest case, the OPD is equ…
SPARCO : a semi-parametric approach for image reconstruction of chromatic objects
J. Kluska, F. Malbet, J. -P. Berger +6
The emergence of optical interferometers with three and more telescopes allows image reconstruction of astronomical objects at the milliarcsecond scale. However, some objects conta…
Roche-lobe filling factor of mass-transferring red giants - the PIONIER view
Henri M. J. Boffin, M. Hillen, J. P. Berger +5
Using the PIONIER visitor instrument that combines the light of the four Auxiliary Telescopes of ESO's Very Large Telescope Interferometer, we measure precisely the diameters of se…