Theoretical tidal evolution constants for stellar models from the pre-main sequence to the white dwarf stage Apsidal motion constants, moment of inertia, and gravitational potential energy

被引:6
作者
Claret, A. [1 ,2 ]
机构
[1] CSIC, Inst Astrofis Andalucia, Apartado 3004, Granada 18080, Spain
[2] Univ Granada, Dept Fis Teor & Cosmos, Campus Fuentenueva s-n, Granada 10871, Spain
关键词
binaries: close; binaries: eclipsing; stars: evolution; stars: interiors; INTERMEDIATE-MASS STARS; DI HERCULIS; MODULES; BINARY; CONVECTION; OVERSHOOT; ROTATION; AGB;
D O I
10.1051/0004-6361/202346250
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Aims. One of the most reliable means of studying the stellar interior is through the apsidal motion in double line eclipsing binary systems since these systems present errors in masses, radii, and effective temperatures of only a few per cent. On the other hand, the theoretical values of the apsidal motion to be compared with the observed values depend on the stellar masses of the components and more strongly on their radii (fifth power). The main objective of this work is to make available grids of evolutionary stellar models that, in addition to the traditional parameters (e.g. age, mass, log g, T-eff), also contain the necessary parameters for the theoretical study of apsidal motion and tidal evolution. This information is useful for the study of the apsidal motion in eclipsing binaries and their tidal evolution, and can also be used for the same purpose in exoplanetary systems. Methods. All models were computed using the MESA package. We consider core overshooting for models with masses >= 1.2 M-circle dot. For the amount of core overshooting we adopted a recent relationship for mass x core overshooting. We adopted for the mixing-length parameter alpha(MLT) the value 1.84 (the solar-calibrated value). Mass loss was taken into account in two evolutionary phases. The models were followed from the pre-main sequence phase to the white dwarf (WD) stage. Results. The evolutionary models containing age, luminosity, log g, and T-eff, as well as the first three harmonics of the internal stellar structure (k(2), k(3), and k(4)), the radius of gyration beta y, and the dimensionless variable alpha, related to gravitational potential energy, are presented in 69 tables covering three chemical compositions: [Fe/H] = -0.50, 0.00, and 0.50. Additional models with different input physics are available.
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页数:7
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