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Double stars with wide separations in the AGK3 - II. The wide binaries and the multiple systems
Jean-Louis Halbwachs, Michel Mayor, Stéphane Udry
A large observation programme was carried out to measure the radial velocities of the components of a selection of common proper motion (CPM) stars, in order to select the physical…
Astrometric planet search around southern ultracool dwarfs II: Astrometric reduction methods and a deep astrometric catalogue
P. F. Lazorenko, J. Sahlmann, D. Segransan +4
We describe the astrometric reduction of images obtained with the FORS2/VLT camera in the framework of an astrometric planet search around 20 M/L-transition dwarfs. We present the…
Astrometric planet search around southern ultracool dwarfs I: First results, including parallaxes of 20 M8-L2 dwarfs
J. Sahlmann, P. F. Lazorenko, D. Segransan +4
Extrasolar planet searches targeting very low-mass stars and brown dwarfs are hampered by intrinsic or instrumental limitations. Time series of astrometric measurements with precis…