J/A+AS/121/327 RR Lyr pulsational model (Bono+ 1997)
Nonlinear investigation of the pulsational properties of RR Lyrae variables
Bono G., Caputo F., Castellani V., Marconi M.
<Astron. Astrophys. Suppl. Ser. 121, 327 (1997)>
=1997A&AS..121..327B 1997A&AS..121..327B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Effective temperatures ; Radial velocities
Keywords: stars: variables: other (RR Lyrae) - stars: oscillations -
stars: horizontal-branch - globular clusters: individual: M3, M5, M15
Description:
We present a theoretical investigation on periods and amplitudes of RR
Lyrae pulsators by adopting stellar parameters which cover the range
of theoretical evolutionary expectations. Extensive grids of
nonlinear, nonlocal and time-dependent convective RR Lyrae envelope
models have been computed to investigate the pulsational behavior in
both fundamental and first overtone modes at selected luminosity
levels and over an effective temperature range which covers the whole
instability region. In order to avoid spurious evaluations of modal
stability and pulsation amplitudes, the coupling between pulsation and
convection was followed through a direct time integration of the
leading equations until radial motions approached their limiting
amplitude. Blue and red boundaries for pulsational instability into
the HR diagram are presented for three different mass values M=0.75,
0.65 and 0.58M☉, together with an atlas of full amplitude
theoretical light curves for both fundamental and first overtone
pulsators and for two different assumptions of stellar masses: M=0.75
and 0.65M☉.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
appen.tex 74 90 LaTeX version of Appendix
table5 70 15 Fundamental Nonlinear Survey for M=0.58M☉
table5.tex 174 41 LaTeX version of table5
table6 70 55 First Overtone Nonlinear Survey for M=0.58M☉
table6.tex 173 99 LaTeX version of table6
table7 70 39 Fundamental Nonlinear Survey for M=0.65M☉
table7.tex 173 76 LaTeX version of table7
table8 70 37 First Overtone Nonlinear Survey for M=0.65M☉
table8.tex 174 73 LaTeX version of table8
table9 70 35 Fundamental Nonlinear Survey for M=0.75M☉
table9.tex 175 67 LaTeX version of table9
table10 70 31 First Overtone Nonlinear Survey for M=0.75M☉
table10.tex 174 58 LaTeX version of table10
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Byte-by-byte Description of file: table5 table6 table7 table8 table9 table10
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Bytes Format Units Label Explanations
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1- 4 F4.2 [solLum] logL Luminosity
6- 13 A8 --- Model Model number (1)
15- 18 I4 K Teff Static effective temperature
20- 24 I5 --- NP Number of period covered during the direct
time integration
26- 31 F6.4 d P Non-linear period
33- 37 F5.4 --- DR/Rph Fractional radial oscillation (Rmax-Rmin)/Rph
where Rph is the photospheric radius
39- 45 F7.3 km/s Du Radial velocity amplitude (u_max - u_min)
46- 51 F6.4 mag DMbol Bolometric amplitude (Mbol_max - Mbol_min)
53- 55 F3.2 [cm/s2] Dloggs Logarithmic amplitude of the static surface
gravity (loggs_max - loggs_min)
57- 60 F4.2 [cm/s2] Dloggeff Logarithmic amplitude of the effective surface
gravity (loggeff_max - loggeff_min)
62- 65 I4 K DT Surface temperature amplitude (T_max - T_min)
67- 70 I4 K DTeff Effective temperature amplitude
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Note (1): (-): pulsationally stable
(+): pulsationally instable
(#): mixed mode (mixture of different radial modes or amplitude
modulations)
(*): switch mode (fundamental toward first overtone or viceversa)
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References:
Bono et al., 1994, ApJS 93, 233 =1994ApJS...93..233B 1994ApJS...93..233B
(End) Patricia Bauer [CDS] 18-Jun-1996