2003A&A...404..333Z


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST11:36:48

2003A&A...404..333Z - Astronomy and Astrophysics, volume 404, 333-340 (2003/6-2)

Evaluating GAIA performances on eclipsing binaries. II. Orbits and stellar parameters for V781 Tau, UV Leo and GK Dra.

ZWITTER T., MUNARI U., MARRESE P.M., PRSA A., MILONE E.F., BOSCHI F., TOMOV T. and SIVIERO A.

Abstract (from CDS):

The orbits and physical parameters of three close, double-lined G0 eclipsing binaries have been derived combining HP, VT, BT photometry from the Hipparcos/Tycho mission with 8480-8740Å ground-based spectroscopy. The setup is mimicking the photometric and spectroscopic observations that should be obtained by GAIA. The binaries considered here are all of G0 spectral type, but each with its own complications: V781 Tau is an overcontact system with components of unequal temperature, UV Leo shows occasional surface spots and GK Dra contains a δ Scuti variable. Such peculiarities will be common among binaries to be discovered by GAIA. We find that the values of masses, radii and temperatures for such stars can be derived with a 1-2% accuracy using the adopted GAIA-like observing mode.

Abstract Copyright:

Journal keyword(s): surveys: GAIA - stars: fundamental parameters - binaries: eclipsing - binaries: spectroscopic

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V781 Tau EB* 05 50 13.1257943382 +26 57 43.362139205   9.28 8.67   7.976 G0 100 0
2 V* UV Leo EB* 10 38 20.7689543921 +14 16 03.664614856   9.62 8.92 9.188 8.194 G0V(N) 257 0
3 V* GK Dra EB* 16 45 41.1853026781 +68 15 30.858906261   9.12 8.77     G0 30 0

    Equat.    Gal    SGal    Ecl

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2021.04.18-11:36:48

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