EAS Publications Series
Volume 2, 2002GAIA: A European Space Project
|Page(s)||257 - 263|
|Section||Section V: Structure, Formation and History of the Galaxy|
|Published online||25 September 2002|
O. Bienaymé and C. Turon (eds)
EAS Publications Series, 2 (2002) 257-263
Astrometric Microlensing with the GAIA Satellite
Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK
The capabilities of the GAIA satellite for the detection of microlensing events are analyzed. The all-sky averaged photometric optical depth is ~7×10-8 and there are ~4000 photometric microlensing events during the five year mission lifetime. The all-sky averaged astrometric microlensing optical depth is ~5×10-5 and ~50 000 sources will have a significant variation of the centroid shift, together with a closest approach, during the mission lifetime. We show that GAIA is the first instrument with the capability to measure the mass locally in very faint objects like black holes and very cool white and brown dwarfs.
© EAS, EDP Sciences, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.