Abstract
The transit of exoplanets across a stellar disk will often occur in GAIA observations. A safe detection of the slight dimming of the star can be made many hundred times, i.e. in cases where the star is sufficiently constant in intensity, and the photometry is very precise. When combined with the simultaneous GAIA astrometry or ground-based radial velocities the scientific harvest is orbit, mass and mass density for hundreds of exoplanets. We have typically considered Jupiter-size planets at Earth-like distances from the stars.
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References
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Høg, E.: 2001, Photometric and imaging performance, in: O. Bienaymé and C. Turon (eds.), J. Phys. IV France, Gaia, a European Space Project, in press. Available as GAIA-CUO-091 at http://www.astro.ku.dk/~erik/gaia/91.
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Høg, E. Detection of Extra-Solar Planets by GAIA Photometry. Astrophysics and Space Science 280, 139–142 (2002). https://doi.org/10.1023/A:1015587130229
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DOI: https://doi.org/10.1023/A:1015587130229