*Astron. Astrophys. Suppl. Ser.* **131**, 395-400

**A. Claret **

**Send offprint request: **A. Claret, e-mail:claret@iaa.es

Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, E-18080 Granada, Spain

Received January 27; accepted March 9, 1998

We present parameters used in the
investigation of the light curves of eclipsing binaries together with other
data needed for the interpretation of their stellar and dynamical evolution. Parameters include limb-darkening coefficients and gravity darkening
exponents, while data includes the apsidal motion constants, the
moment of inertia, and the potential energy. The adopted stellar models are
those computed by Claret (1995) for a representative chemical
composition of *X*=0.70 and *Z*=0.02. In addition to the parameters needed
for the study of the dynamical behavior and tidal evolution of binary systems,
we supply the linear limb-darkening
coefficients computed in 12 different photometric bands, as well as the
gravity darkening exponent for each point along the evolutionary track.

We have developed a method, based on the triangles strategy by Kippenhahn et al. (1967) to compute the gravity-darkening exponent using interior models. For the first time, the gravity-darkening exponents are presented as a function of mass and age. The old values of and 1.0 - for convective and radiative envelopes are thus superseded by the present calculations and a smooth transition is achieved between both energy transport mechanisms.

The tables presented here assist modeling of the light curves of close binaries using limb-darkening and gravity darkening coefficients which are consistent with the observed masses, radii and effective temperatures.

In order to facilitate the use of the grid of models presented here in a
variety of different research fields other than binary stars, synthetic colors
(*U*-*B*, *B*-*V*, *u*-*b*, *b*-*y*) and *M*_{v} are also given.

**Key words: **stars: binaries: eclipsing -- stars: evolution; interiors;
fundamental
parameters

- 1 Introduction
- 2 The limb-darkening coefficients and the colors
- 3 The interior models and the computation of the gravity-darkening exponent
- References

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