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Evaluating the Gaia Contribution to the Field of Eclipsing Binaries with Ground-Based Spectroscopy and Hipparcos Photometry

Published online by Cambridge University Press:  12 July 2007

P. G. Niarchos ,
U. Munari  and
T. Zwitter
P. G. Niarchos
Affiliation:
Department of Astrophysics, Astronomy and Mechanics, National and Kapodistrian University of Athens, Athens, Greece email: pniarcho@phys.uoa.gr
U. Munari
Affiliation:
Osservatorio Astronomico di Padova, Sede di Asiago, 36012 Asiago (VI), Italy Dipartimento di Astronomia dell'Universita di Padova, Osservatorio Astrofisico, 36012 Asiago (VI), Italy
T. Zwitter
Affiliation:
University of Ljubljana, Department of Physics, Jadranska 19, 1000 Ljubljana, Slovenia
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Abstract

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During its definition phase, ESA's Cornerstone mission Gaia was designed to perform extremely accurate photometry in 10 medium plus 5 broad bands and to collect about 90 epoch spectra with a resolving power of 11500 and a wavelength range 8480–8740Å (centered on the CaII triplet in the far red). Combining epoch photometry from the ground and the Hipparcos mission with ground-based spectra strictly simulating Gaia ones, we have investigated in a series of papers the performance expected from Gaia on SB2 EBs. We review here the results we obtained. The Gaia design is now under major revision, and its impact on EBs will be briefly addressed.

Keywords

Surveys – stars: fundamental parameters – binaries: eclipsing – binaries: spectroscopic

References

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