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GRAVITY: a four-telescope beam combiner instrument for the VLTI
S. Gillessen, F. Eisenhauer, G. Perrin +60
GRAVITY is an adaptive optics assisted Beam Combiner for the second generation VLTI instrumentation. The instrument will provide high-precision narrow-angle astrometry and phase-re…
Lucky Imaging survey for southern M dwarf binaries
C. Bergfors, W. Brandner, M. Janson +7
While M dwarfs are the most abundant stars in the Milky Way, there is still large uncertainty about their basic physical properties (mass, luminosity, radius, etc.) as well as thei…
Discovery of a stellar companion to the nearby solar-analogue HD 104304
Carolin Schnupp, Carolina Bergfors, Wolfgang Brandner +6
Sun-like stars are promising candidates to host exoplanets and are often included in exoplanet surveys by radial velocity (RV) and direct imaging. In this paper we report on the de…
2MASS J03105986+1648155AB - A new binary at the L/T transition
M. B. Stumpf, W. Brandner, H. Bouy +2
The transition from the L to the T spectral type of brown dwarfs is marked by a very rapid transition phase, remarkable brightening in the J-band and a higher binary frequency. Des…