Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...330..600r&link_type=abstract
Astronomy and Astrophysics, v.330, p.600-604 (1998)
Astronomy and Astrophysics
Astrophysics
28
Stars: Fundamental Parameters, Stars: Distances, Stars: Binaries: Eclipsing, Stars: Early-Type, Stars: Late-Type
Scientific paper
Effective temperatures of detached eclipsing binaries computed through Hipparcos trigonometric parallaxes are compared with the photometric determinations. The former are based on the values of the radius, the apparent visual magnitude and the bolometric correction of the star, whereas the latter are obtained from standard calibrations using Stromgren or Johnson colour indices. The working sample contains all well-studied detached double-lined eclipsing binaries belonging to the Hipparcos catalogue and with relative errors in the parallaxes smaller than 20%. They cover a temperature range from 5000 K to 25000 K. A small systematic trend of 0.010 dex (s.d. 0.010) for T_eff <= 10000 K and of 0.015 dex (s.d. 0.060) for T_eff > 10000 K is observed between the two temperature determinations, that could be due to inaccuracies on photometric effective temperatures. Based on data from the ESA Hipparcos astrometry satellite
Gimenez Alvaro
Jordi Carme
Oblak Edouard
Ribas Ignasi
Torra Jordi
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