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J/MNRAS/298/525   Stellar evolution models for Z = 0.0001 to 0.03 (Pols+ 1998)
Stellar evolution models for Z = 0.0001 to 0.03.
    Pols O.R., Schroeder K.-P., Hurley J.R., Tout C.A., Eggleton P.P.
   <Mon. Not. R. Astron. Soc., 298, 525-536 (1998)>
   =1998MNRAS.298..525P
ADC_Keywords: Models, evolutionary

Keywords: convection - stars: evolution - Hertzsprung-Russell (HR) diagram -
          stars: population II - open clusters and associations: general -
          galaxies: stellar content

Abstract:
    We have calculated a grid of empirically well tested evolutionary
    tracks with masses M between 0.5 and 50M☉, spaced by
    approximately 0.1 in log M, and with metallicities Z=0.0001, 0.0003,
    0.001, 0.004, 0.01, 0.02 and 0.03. We use a robust and fast evolution
    code with a self-adaptive non-Lagrangian mesh, which employs the
    mixing-length theory but treats convective mixing as a diffusion
    process, solving simultaneously for the structure and the chemical
    composition. The hydrogen and helium abundances are chosen as
    functions of the metallicity: X=0.76-3.0Z and Y=0.24+2.0Z. Two sets of
    models were computed, one without and one with a certain amount of
    enhanced mixing or 'overshooting'.

Description:
    The results of the models studied in the paper are stored in the
    "evgrid" subdirectory, which includes for the metallicities/masses
    studied the ZAMS parameters and the evolutionary tracks computed with
    or without overshooting. A set of Fortran programs is also included
    which computes luminosities, radiuses, absolute magnitudes, and colors
    in the UBVRI Johnson-Cousins as a function of stellar age for any
    interpolation in the grid of models; a README file in this "evgrid"
    subdirectory gives details for an extended usage of the models.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
evgrid/*           0       38   The grid of models and interpolation programs
summary.dat      173     2827   Summary of critical turning points
ubvri_k.dat       52     6041  *Synthetic Johnson-Cousins BVRI colors (Kurucz)
ubvri_c.dat       52     6041  *Synthetic Johnson-Cousins BVRI colors (corrected)

Note on ubvri_k.dat, ubvri_c.dat: synthetic bolometric correction and UBVRI
     colours from Kurucz model atmospheres (1992IAUS..149..225K) are in the
     file "ubvri_k.dat", while the file "ubvri_c.dat" contains an
     empirically corrected version from Lejeune, Cuisinier & Buser
     (1997A&AS..125..229L)


See also:
  J/A+AS/125/229 : A standard stellar library (Lejeune+ 1997)
  J/A+AS/130/65  : A standard stellar library. II. (Lejeune+ 1998)
    VI/102 : Geneva stellar evolution tracks and isochrones (Lejeune+, 2001)
    VI/54  : Horizontal Branch Stellar Model Calculations (Dorman 1992)
    VI/65  : Evolutionary models of evolved stars (Dorman+ 1993)
    VI/96  : Evolutionary Sequences (Fagotto+ 1993-96)
    VI/113 : Evolutionary models of Population II stars (Cariulo+, 2004)
    VI/118 : Stellar Models until He burning (Claret+ 1995-1998)


Byte-by-byte Description of file: ubvri_*.dat

   Bytes Format Units   Label     Explanations

   1-  5  F5.2  [Sun]   [Fe/H]    Metallicity
   7- 11  I5    K       Teff      Effective temperature
  13- 17  F5.2  [cm/s2] log.g     Surface gravity
  19- 24  F6.3  mag     BC(V)     Bolometric correction
  26- 31  F6.3  mag     U-B       Johnson color index U-B
  33- 38  F6.3  mag     B-V       Johnson color index B-V
  40- 45  F6.3  mag     V-R       Johnson-Cousins color index V-R
  47- 52  F6.3  mag     R-I       Cousins color index R-I


Byte-by-byte Description of file: evgrid/ZAMS*

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     Mod       Model number (see paper)
   6- 12  F7.4  solMass M         Star mass
  15- 20  F6.4  [K]     log.Te    Effective temperature
  22- 28  F7.4 [solLum] log.L     Star Luminosity
  30- 36  F7.4 [solRad] log.R     Star radius
  38- 43  F6.4  ---     k2        Dimensionless moment of inertia I/(MR2)
  45- 50  F6.4  [T]     Tc        Core temperature
  52- 57  F6.4  [g/cm3] Dc        Core density
  59- 64  F6.5  ---     H1.c      Core  mass fraction of Hydrogen (1H)
  66- 71  F6.5  ---     He4.c     Core mass fraction of Helium (4He)
  73- 78  F6.5  ---     C12.c     Core mass fraction of Carbon (12C)
  80- 85  F6.5  ---     N14.c     Core mass fraction of Nitrogen (14N)
  87- 92  F6.5  ---     O16.c     Core mass fraction of Oxygen (16O)


Byte-by-byte Description of file: summary.dat

   Bytes Format Units   Label     Explanations

       1  A1    ---     O         [OS] Standard or Overshooting model
   2-  7  F6.4  ---     Z         Initial metallicity (1)
   9- 15  F7.4  solMass Mass      Star mass (no mass loss taken into account)
  17- 19  I3    ---     Mod       "Model" (evolution) number (see paper)
      21  A1    ---     n_Mod     [A-Z] Critical phase of evolution (2)
  23- 26  I4    ---     fMod      Final model number
  28- 42  E15.9 yr      Age       Star age
  45- 50  F6.4  [K]     log.Te    Effective temperature at Age
  52- 58  F7.4 [solLum] log.L     Star Luminosity at Age
  60- 66  F7.4 [solRad] log.R     Star radius at Age
  68- 74  F7.4 [solMass] Mc.He    Helium core mass
  76- 82  F7.4 [solMass] Mc.CO    Carbon/Oxygen core mass
  84- 89  F6.4  ---     k2        Dimensionless moment of inertia I/(MR2)
  91- 96  F6.4  [T]     Tc        Core temperature
  98-103  F6.4  [g/cm3] Dc        Core density
 105-110  F6.5  ---     H1.c      Core  mass fraction of Hydrogen (1H)
 112-117  F6.5  ---     He4.c     Core mass fraction of Helium (4He)
 119-124  F6.5  ---     C12.c     Core mass fraction of Carbon (12C)
 126-131  F6.5  ---     N14.c     Core mass fraction of Nitrogen (14N)
 133-138  F6.5  ---     O16.c     Core mass fraction of Oxygen (16O)
 140-145  F6.5  ---     H1.s      Shell  mass fraction of Hydrogen (1H)
 147-152  F6.5  ---     He4.s     Shell mass fraction of Helium (4He)
 154-159  F6.5  ---     C12.s     Shell mass fraction of Carbon (12C)
 161-166  F6.5  ---     N14.s     Shell mass fraction of Nitrogen (14N)
 168-173  F6.5  ---     O16.s     Shell mass fraction of Oxygen (16O)

Note (1): values are 0.0001, 0.0003, 0.001, 0.004, 0.01, 0.02 or 0.03

Note (2): 19 phases are defined, from A (Zero-age main sequence) to Z
     (final: e.g. C is the terminal age main sequence, H is the He
     ignition, W is the C ignition (see paper, table2)

(End)                                   Francois Ochsenbein [CDS]    24-Mar-2009