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First results from fringe tracking with the PRIMA fringe sensor unit
J. Sahlmann, R. Abuter, S. Menardi +12
The fringe sensor unit (FSU) is the central element of the phase referenced imaging and micro-arcsecond astrometry (PRIMA) dual-feed facility for the Very Large Telescope interfero…
A possible dividing line between massive planets and brown-dwarf companions
Johannes Sahlmann, Damien Segransan, Didier Queloz +1
Brown dwarfs are intermediate objects between planets and stars. The lower end of the brown-dwarf mass range overlaps with the one of massive planets and therefore the distinction…
Astrometric search for a planet around VB 10
P. F. Lazorenko, J. Sahlmann, D. Segransan +9
We observed VB 10 in August and September 2009 using the FORS2 camera of the VLT with the aim of measuring its astrometric motion and of probing the presence of the announced plane…
Search for brown-dwarf companions of stars
Johannes Sahlmann, Damien Segransan, Didier Queloz +7
The discovery of 9 new brown-dwarf candidates orbiting stars in the CORALIE and HARPS radial-velocity surveys is reported. New CORALIE radial velocities yielding accurate orbits of…