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J/A+AS/121/327      RR Lyr pulsational model (Bono+ 1997)
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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      (SIMBAD/NED BibCode)
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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_{sun}_, 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_{sun}_.

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_{sun}_
table5.tex     174       41   LaTeX version of table5
table6          70       55   First Overtone Nonlinear Survey for M=0.58M_{sun}_
table6.tex     173       99   LaTeX version of table6
table7          70       39   Fundamental Nonlinear Survey for M=0.65M_{sun}_
table7.tex     173       76   LaTeX version of table7
table8          70       37   First Overtone Nonlinear Survey for M=0.65M_{sun}_
table8.tex     174       73   LaTeX version of table8
table9          70       35   Fundamental Nonlinear Survey for M=0.75M_{sun}_
table9.tex     175       67   LaTeX version of table9
table10         70       31   First Overtone Nonlinear Survey for M=0.75M_{sun}_
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     Surface 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
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(End)                                         Patricia Bauer [CDS]   18-Jun-1996