VI/65 Evolutionary models of evolved stars (Dorman+ 1993)
Ultraviolet Radiation from Evolved Stellar Populations. I. Models
Dorman B., Rood R.T., O'Connell R.W.
<Astrophys. J. 419, 596 (1993)>
=1993ApJ...419..596D 1993ApJ...419..596D
ADC_Keywords: Models, evolutionary
Description:
Tables are given for all of the evolutionary tracks in the paper,
which represent the evolution from the Zero-Age Horizontal Branch
to a point either late in the AGB evolution, or in many cases to a
point on the white dwarf cooling sequences.
There are sequences for 8 different compositions. The original grid
of tracks comprises several tens of thousands of models. In order
to make this grid easy to use while not seriously compromising the
representation of the evolution, much shorter tables have been derived
for the general user. The data given here have been derived from these
original calculations by linear and quadratic interpolation routines.
For the HB phase, the evolution is represented at a fixed set of core
helium values. After core exhaustion, the table points are at fixed
intervals along the evolutionary path.
The compositions in the tables are denoted as follows:
--------------------------------------------------
Filename YHB [Fe/H] [O/Fe] Mc
--------------------------------------------------
g14.dat 0.245 -2.26 0.50 0.495
e64.dat 0.247 -1.48 0.60 0.485
j63.dat 0.257 -0.47 0.23 0.475
z22.dat 0.288 +0.00 0.00 0.469
z42.dat 0.292 +0.39 0.00 0.464
z62.dat 0.289 +0.58 0.00 0.458
yz42.dat 0.356 +0.43 0.00 0.454
yz62.dat 0.459 +0.71 0.00 0.434
-------------------------------------------------
The columns give respectively:
1 Age in Myr since ZAHB
2 Central helium fraction
3 log Te (effective temperature, Kelvin)
4 log L (surface luminosity) in solar units
5 log g (surface gravity, cgs units)
6 log R (radius, cm)
7 Mass at peak energy production rate of hydrogen burning
shell (solar units)
8 log Tc (central Temperature, Kelvin)
9 log rho_c (central density cgs units)
The fortran format for the data tables is:
'(f10.5,8(2x,f7.4))'
for the first header line the format is:
'("Track: ",i4,"lines Mass = ",f5.3," [Fe/H] = ",f5.2," [O/Fe] = ",
f5.2," Y = ", f5.3)'
while the second header line containing the column titles can of course
be read as a character string ( format = '(a)' ).
More specialized data is available in some cases from the first
author, who should be contacted if other data are needed (see
AAS directory for current address.)
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
g14.dat 82 2014 Y=0.245 [Fe/H]=-2.26 [O/Fe]=0.50 Mc=0.495
e64.dat 82 1695 Y=0.247 [Fe/H]=-1.48 [O/Fe]=0.60 Mc=0.485
j63.dat 82 1351 Y=0.257 [Fe/H]=-0.47 [O/Fe]=0.23 Mc=0.475
z22.dat 82 1408 Y=0.288 [Fe/H]=+0.00 [O/Fe]=0.00 Mc=0.469
z42.dat 82 1118 Y=0.292 [Fe/H]=+0.58 [O/Fe]=0.00 Mc=0.464
z62.dat 82 1171 Y=0.289 [Fe/H]=+0.58 [O/Fe]=0.00 Mc=0.458
yz42.dat 82 1170 Y=0.356 [Fe/H]=+0.43 [O/Fe]=0.00 Mc=0.454
yz62.dat 82 1101 Y=0.459 [Fe/H]=+0.71 [O/Fe]=0.00 Mc=0.434
tofits.sh 80 68 Generates a FITS file with all models on
a Unix station
models.fih 76 75 FITS header for all models
models.dat 106 10756 Table with all models
--------------------------------------------------------------------------------
Summary of all models:
A file "models.dat" including all data can be generated on a Unix
station corresponding to the "Byte-per-byte Description" below
with the following shell command:
cat *.dat | awk '/^Track/{Y=$15;Fe=$9;O=$12;M=$6;next}/^ *Age/{next} {printf("%6s %5s %5s%6s",Y,Fe,O,M);print;}' > models.dat
See also:
VI/54 : Horizontal Branch Stellar Model Calculations (Dorman 1992)
Byte-per-byte Description of file: models.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 6 F5.3 --- YHB He composition
8- 12 F5.2 [Sun] [Fe/H] composition (log scale relative to Sun)
14- 18 F5.2 [Sun] [O/Fe] O composition (log scale relative to Sun)
20- 24 F5.3 solMass Mass [0.44/0.9] Total mass
26- 34 F9.5 Myr Age since Zero-Age Horizontal Branch (ZAHB)
37- 43 F7.4 --- Yc Central helium fraction
46- 52 F7.4 [K] log.Te Effective temperature
55- 61 F7.4 [solLum] log.L Surface luminosity
64- 70 F7.4 [cm/s2] log.g Surface gravity (cgs units)
73- 79 F7.4 [cm] log.R Radius
82- 88 F7.4 solMass Msh Mass at peak energy production rate of
hydrogen burning shell
91- 97 F7.4 [K] log.Tc Central temperature
100-106 F7.4 [g/cm3] log.rho_c Central density
--------------------------------------------------------------------------------
History:
* 18-Apr-1994: First version
* 11-Jan-2007: file models.dat added
(End) Ben Dorman [Univ. of Virginia], Francois Ochsenbein [CDS] 18-Apr-1994