J/A+A/322/817 Theoretical RRab light curves properties (Feuchtinger+ 1997)
Properties of theoretical RRab light curves
Feuchtinger M.U., Dorfi E.A.
<Astron. Astrophys. 322, 817 (1997)>
=1997A&A...322..817F 1997A&A...322..817F (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable
Keywords: stars: variables - stars: interiors - stars: oscillations -
method: numerical
Abstract:
Using an adaptive radiation hydrodynamics code we have computed a grid
of fundamental mode RR Lyrae models in order to give a detailed
comparison to observed RR Lyrae light curves and to investigate the
influence of several numerical parameters inherent to the
computational method. The results can be summarized as follows:
Concerning the comparison to observations the proposed solution of the
well known RR Lyrae phase discrepancy in Feuchtinger & Dorfi
(1996A&A...306..837F 1996A&A...306..837F) is corroborated on the basis of more than 50
models. It is shown how the Fourier parameters vary during the
crossings of the instability strip. Based on the large number of
theoretical models we can study the properties of theoretical RRab
light curves and e.g. state that no clear relation exists which links
the fundamental stellar parameters to the low order Fourier
coefficients. Investigating the long term evolution and the influence
of several critical parameters like numerical viscosity, number of
grid points or switching temperature between Lagrangian and adaptive
grid, it turns out that the Fourier parameters are essentially
independent on the special choice of our numerical parameters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 96 61 Stellar parameters of the models and parameters
of the resulting nonlinear light curves
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Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 4 F4.2 solMass Mass Mass
6- 9 F4.1 solLum L Luminosity
11- 14 I4 K Teff Effective temperature
16- 21 F6.4 --- Z Metallicity
23- 27 F5.3 mag dL Bolometric luminosity amplitude
29- 33 F5.3 d P0 Fundamental period
35- 39 F5.3 --- R21 Fourier amplitude (A2/A1 ratio)
41- 45 F5.3 --- Phi21 Fourier phase (P2 - 2P1 value)
47- 51 F5.3 --- Phi31 Fourier phase (P3 - 3P1 value)
53- 57 F5.3 --- A0 Fundamental Fourier amplitude
59- 63 F5.3 --- A1 First harmonic Fourier amplitude
65- 69 F5.3 --- A2 Second harmonic Fourier amplitude
71- 75 F5.3 --- A3 Third harmonic Fourier amplitude
77- 82 F6.3 --- P1 First harmonic Fourier phase
84- 89 F6.3 --- P2 Second harmonic Fourier phase
91- 96 F6.3 --- P3 Third harmonic Fourier phase
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Acknowledgements: Michael U. Feuchtinger
(End) Patricia Bauer [CDS] 07-Jan-1997