Physics
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.576...83r&link_type=abstract
"Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576). Held at the Observatoire de Paris-Me
Physics
Gaia, Galaxy Structure, Galaxy Evolution, Stellar Population
Scientific paper
The expected number of sources in the Gaia final catalogue is investigated and discussed with regards to uncertainties on interstellar extinction, assumed instrument sensitivity and overall characteristics, and model parameters. Numbers as a function of magnitude, of stars of different populations, spectral types, luminosity class are given. We explore the various uncertainties on these numbers and implications for understanding galaxy formation and evolution.
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