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astro-ph2004
Gaia First Look
S. Jordan, U. Bastian, H. Lenhardt +3
A complicated and ambitious space mission like Gaia needs a careful monitoring and evaluation of the functioning of all components of the satellite. This has to be performed on dif…
astro-ph2004
Astrometric limits set by surface structure, binarity, microlensing
U. Bastian, H. Hefele
We give an assessment of the significance of various known effects which may produce genuine fluctuations of star positions comparable to or larger than Gaia's measurement noise, a…
astro-ph2004
Weighing stellar - mass black holes with Gaia
B. Fuchs, U. Bastian
Stellar-mass black holes have been detected by radial-velocity observations in star/black hole binaries. These allow only the determination of the mass function. Tracking the astro…