J/A+A/541/A113 Evolutionary tracks for pre-main sequence stars (Claret, 2012)
Gravity-darkening exponents and apsidal-motion constants for pre main-sequence
models.
Claret A.
<Astron. Astrophys. 541, A113 (2012)>
=2012A&A...541A.113C 2012A&A...541A.113C
ADC_Keywords: Models, evolutionary ; Stars, pre-main sequence
Keywords: stars: binaries: close - stars:evolution - stars:interiors -
stars:rotation - stars: pre main-sequence
Abstract:
The apsidal-motion constants kj and the moment of inertia are often
used to study the apsidal-motion and tidal evolution of double-lined
eclipsing binaries and planetary systems. On the other hand, the
computation of the theoretical light curves of eclipsing binaries,
planetary transits, and single rapidly rotating stars requires the
knowledge of how the flux is distributed over the distorted stellar
surfaces which can derived from the gravity-darkening exponent. Such
parameters are available for several masses and chemical compositions
covering the main-sequence and giant branch. However, for early phases
(pre main-sequence, hereafter PMS) the calculations are scarce or even
lacking. We present the calculations of the apsidal-motion constants,
the fractional radius of gyration, and the gravity-darkening exponents
for an extensive grid of PMS. The code used to generate the PMS models
is essentially the same as that described by us in 2004. The
apsidal-motion constants, the moment of inertia and the potential
energy were computed using a fourth order Runge-Kutta method. The
gravity-darkening exponents were computed using a method previously
developed by us. The apsidal-motion constants, the moment of inertia,
the potential energy, and the gravity-darkening exponents are made
available for each point on every evolutionary track for PMS models
covering the mass range 0.05-30M☉. Our calculations are made
available for three chemical compositions (X, Z)=(0.757, 0.001),
(0.70, 0.02), (0.64, 0.04).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
z001.dat 140 6402 Evolutionnary tracks for Z=0.001, X=0.757
z02.dat 140 7917 Evolutionnary tracks for Z=0.02, X=0.70
z04.dat 140 7685 Evolutionnary tracks for Z=0.04, X=0.64
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See also:
VI/118 : Stellar Models until He burning (Claret+ 1995-1998)
J/A+AS/131/395 : Eclipsing binaries light curves models (Claret 1998)
J/A+AS/114/247 : Limb-darkening coefficients for R I J H K (Claret+, 1995)
J/A+A/335/647 : Limb-darkening coefficients for ubvyUBVRIJHK (Claret 1998)
J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)
J/A+A/363/1081 : Non-linear limb-darkening law for LTE models (Claret, 2000)
J/A+A/401/657 : Non-linear limb-darkening law for LTE models II (Claret, 2003)
J/A+A/428/1001 : Non-linear limb-darkening law for LTE models III (Claret 2005)
J/A+A/424/919 : New grids of stellar models I (Claret, 2004)
J/A+A/440/647 : New grids of stellar models II (Claret, 2005)
J/A+A/453/769 : New grids of stellar models III (Claret+, 2006)
J/A+A/467/1389 : New grids of stellar models IV (Claret, 2007)
Byte-by-byte Description of file: z001.dat z02.dat z04.dat
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Bytes Format Units Label Explanations
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1- 5 F5.3 --- Z [0.001/0.04] Initial Z abundance
7- 11 F5.3 --- X [0.64/0.757] Initial X abundance
13- 17 F5.2 Msun Mini [0.04/30] Initial mass
19- 30 E12.7 yr Age Age of the models
33- 41 F9.6 Msun Mass Actual mass of the model
44- 52 F9.6 [Lsun] logL Log(Total luminosity)
55- 63 F9.6 [K] logTe Log(Effective temperature)
66- 74 F9.6 [cm/s2] logg Log(Surface gravity)
77- 85 F9.6 [-] logK2 Log(Apsidal motion constant (j=2))
88- 96 F9.6 [-] logK3 Log(Apsidal motion constant (j=3))
99-107 F9.6 [-] logK4 Log(Apsidal motion constant (j=4))
110-118 F9.6 --- alphaP alphaP =-EpxR/GM2
121-129 F9.6 --- Rgyr Fractional gyration radius
132-140 F9.6 --- beta1 [0/1] Gravity-darkening exponent
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Acknowledgements:
Antonio Claret, claret(at)iaa.es
(End) Patricia Vannier [CDS] 27-Apr-2012