J/A+AS/125/439 Stellar models until He burning - III. (Claret+, 1997)
Stellar models for a wide range of initial chemical compositions until helium
burning. III. From X=0.55 to X=0.75, for Z=0.03
Claret A.
<Astron. Astrophys. Suppl. Ser. 125, 439 (1997)>
=1997A&AS..125..439C 1997A&AS..125..439C (SIMBAD/NED BibCode)
ADC_Keywords: Models, evolutionary
Keywords: stellar evolution - chemical composition - binary stars -
apsidal motion
Abstract:
In this Paper I present grids for the stellar models with a slightly
higher metallic content than in the previous works (Claret,
1995A&AS..109..441C 1995A&AS..109..441C; Claret & Gimenez, 1995A&AS..114..549C 1995A&AS..114..549C), say,
Z=0.03. The initial helium abundances in mass are Yi=0.42, 0.32 and
0.22; this last value was used only to facilitate interpolations since
it is a little bit smaller than the primordial helium abundance. The
present computations are based on the radiative opacities with
spin-orbi t coupling provided by the Lawrence Livermore group
(Iglesias et al., 1992ApJ...397..771I 1992ApJ...397..771I). For the lower temperatures I
have used the results by Alexander (1992, priv. comm.). Core
overshooting was taken into account as well as mass loss. The models
presented here cover the mass range between 1 and 40M☉. I also
compute for all models the internal structure constants kj and the
radius of gyration β. For the first time the calculation of the
tidal constants E2 and λ2, which are used to evaluate
circularization and synchronization times in binary stars, are
presented for stellar models as a function of the initial mass and
time. The former is related with the dynamical tidal contribution to
the total perturbed potential in a binary star while the latter is
connected with the external structure of the outer layers.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables 96 2160 All models with Z=0.03, X=0.55, 0.65 and 0.75
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See also:
J/A+AS/109/441 : Stellar models until He burning - I. (Claret, 1995)
J/A+AS/114/549 : Stellar models until He burning - II. (Claret+, 1995)
J/A+AS/133/123 : Stellar models until He burning - IV. (Claret+ 1998)
Byte-by-byte Description of file: tables
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Bytes Format Units Label Explanations
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1- 6 F6.4 [solMass] logM [0/1.6] Initial mass of the model
8- 11 F4.2 --- X [0.55/0.75] X initial composition (H)
13- 16 F4.2 --- Z [0.03] Z initial composition
18 I1 --- Overshoot [0/1] without (0) or with (1) overshooting
20- 31 D12.6 yr Age Age of models
33- 39 F7.4 [solLum] log(L) Total luminosity
41- 47 F7.4 [cm/s2] log(g) Surface gravity
49- 54 F6.4 [K] log(Teff) Effective temperature
56- 62 F7.4 --- log(k2) Apsidal motion constant (j=2)
64- 70 F7.4 --- log(k3) Apsidal motion constant (j=3)
72- 78 F7.4 --- log(k4) Apsidal motion constant (j=4)
80- 89 D10.4 --- alpha alpha = -Ep x R/GM^2
91- 96 F6.4 ---- beta Fractional gyration radius
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Acknowledgements: A. Claret
(End) Patricia Bauer [CDS] 17-Apr-1997