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J/A+A/508/355       Scaled solar tracks and isochrones       (Bertelli+, 2009)

Scaled solar tracks and isochrones in a large region of the Z-Y plane. II. From 2.5 to 20M stars. Bertelli G., Nasi E., Girardi L., Marigo P. <Astron. Astrophys., 508, 355-369 (2009)> =2009A&A...508..355B
ADC_Keywords: Models, evolutionary ; Magnitudes ; Abundances Keywords: stars: evolution - Cepheids Abstract: We extend our theoretical computations for low-mass stars to intermediate-mass and massive stars, for which few databases exist in the literature. Evolutionary tracks and isochrones are computed for initial masses 2.50-20M for a grid of 37 chemical compositions with metal content Z between 0.0001 and 0.070 and helium content Y between 0.23 and 0.40 to enable users to obtain isochrones for ages as young as about 107 years and to simulate stellar populations with different helium-to-metal enrichment laws. The Padova stellar evolution code is identical to that used in the first paper of this series. Synthetic TP-AGB models allow stellar tracks and isochrones to be extended until the end of the thermal pulses along the AGB. We provide software tools for the bidimensional interpolation (in Y and Z) of the isochrones from very old ages down to about 107 years. This lower limit depends on chemical composition. The extension of the blue loops and the instability strip of Cepheid stars are compared and the Cepheid mass-discrepancy is discussed. The location of red supergiants in the H-R diagram is in good agreement with the evolutionary tracks for masses from 10 to 20M. Tracks and isochrones are available in tabular form for the adopted grid of chemical compositions in the extended plane Z-Y in three photometric systems. An interactive web interface allows users to obtain isochrones of any chemical composition inside the provided Z-Y range and also to simulate stellar populations with different Y(Z) helium-to-metal enrichment laws. Description: Evolutionary tracks and Isochrones in the Johnson-Cousins UBVRIJHK system for the compositions: Z=0.0001 (Y=0.23, 0.26, 0.30, 0.40) Z=0.0004 (Y=0.23, 0.26, 0.30, 0.40) Z=0.001 (Y=0.23, 0.26, 0.30, 0.40) Z=0.002 (Y=0.23, 0.26, 0.30, 0.40) Z=0.004 (Y=0.23, 0.26, 0.30, 0.40) Z=0.008 (Y=0.23, 0.26, 0.30, 0.34, 0.40) Z=0.017 (Y=0.23, 0.26, 0.30, 0.34, 0.40) Z=0.040 (Y= 0.26, 0.30, 0.34, 0.40, 0.46) Z=0.070 (Y= 0.30, 0.34, 0.40, 0.46) The evolutionary tracks include those presented in Paper I (Bertelli et al. 2008A&A...484..815B); the masses of the models cover the range 0.6 to 20M☉. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 82 9 Combinations of Z and Y of the computed tracks iso/* 132 39 Isochrone tables tracks.dat 81 1276 Stellar tracks list agb/* 51 912 *Stellar tracks for AGB, M=0.55 to M=2.50 hb/* 158 571 *Stellar tracks for horizontal branch, M=0.55 to M=2.50 ms/* 158 1160 *Stellar tracks for main sequence, M=0.55 to M=20.
Note on agb/* hb/* ms/*: Filenames in the form zZZZZyYY_m.mm.dat, where ZZZZ is the initial metallicity Z*104, YY is the initial helium abundance Y*102 and m.mm is the initial mass.
See also: VI/96 : Evolutionary Sequences (Fagotto+ 1993-96) J/A+AS/106/275 : Theoretical isochrones (Bertelli+ 1994) J/A+AS/141/371 : Low-mass star evolutionary tracks & isochrones (Girardi+ 2000) J/MNRAS/387/105 : Isochrone database for single+binary-star SSPs (Li+, 2008) http://stev.oapd.inaf.it/YZVAR : Complete data-base Home Page Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 F6.4 --- Z [0.0001/0.070] Initial metallicity (G1) 8- 19 A12 --- Y23 Filename for Y=0.23 in iso subdirectory 21- 32 A12 --- Y26 Filename for Y=0.26 in iso subdirectory 34- 45 A12 --- Y30 Filename for Y=0.30 in iso subdirectory 47- 57 A11 --- Y34 Filename for Y=0.34 in iso subdirectory 59- 70 A12 --- Y40 Filename for Y=0.40 in iso subdirectory 72- 82 A11 --- Y46 Filename for Y=0.46 in iso subdirectory
Byte-by-byte Description of file (1 headlines): iso/*
Bytes Format Units Label Explanations
3- 9 F7.4 [yr] logAge Age 12- 18 F7.4 [solLum] logL Surface luminosity 22- 27 F6.4 [K] logTe Effective temperature 30- 36 F7.4 [cm/s2] logG Surface gravity 40- 45 F6.4 solMass Mi Initial mass 49- 54 F6.4 solMass Mcur Actual stellar mass 56- 64 F9.6 --- FLUM Indefinite integral over the initial mass M of the Salpeter initial mass function by number 67- 72 F6.3 mag UMAG Johnson U absolute magnitude 75- 80 F6.3 mag BMAG Johnson B absolute magnitude 83- 88 F6.3 mag VMAG Johnson V absolute magnitude 91- 96 F6.3 mag RMAG Cousins R absolute magnitude 99-104 F6.3 mag IMAG Cousins I absolute magnitude 107-112 F6.3 mag JMAG Johnson J absolute magnitude 115-120 F6.3 mag HMAG Johnson H absolute magnitude 123-128 F6.3 mag KMAG Johnson K absolute magnitude 132 I1 --- CP [0/2] Index marking the presence of a characteristic point, when different from zero
Byte-by-byte Description of file: tracks.dat
Bytes Format Units Label Explanations
1- 6 F6.4 --- Z [0.0001/0.070] Initial metallicity (G1) 8- 11 F4.2 --- Y [0.23/0.46] Initial helium abundance (G2) 13- 17 F5.2 solMass Mass [0.49/20.0] Initial Mass 19- 38 A20 --- MS Filename of Main Sequence tracks 40- 59 A20 --- HB Filename of Horizontal Branch tracks 61- 81 A21 --- AGB Filename of Asymptotic Giant Branch tracks
Byte-by-byte Description of file (# headlines): agb/*
Bytes Format Units Label Explanations
1- 3 I3 --- N Sequential number 5- 16 E12.7 yr Age Age 18- 23 F6.4 [solLum] logL Total luminosity 25- 30 F6.4 [K] logTeff Effective temperature 32- 37 F6.4 solMass Mact Actual stellar mass 39- 44 F6.4 solMass Mcore Core mass 46- 51 F6.3 --- C/O Surface C/O ratio
Byte-by-byte Description of file (# headlines): hb/* ms/*
Bytes Format Units Label Explanations
1- 3 I3 --- N Sequential number 4- 16 E13.8 yr Age Age 17- 23 F7.4 [solLum] logL Total luminosity 25- 30 F6.4 [K] logTeff Effective temperature 31- 37 F7.4 [cm/s2] logG Surface gravity 39- 45 F7.4 [K] logTc Central temperature 47- 52 F6.4 [-] logrho Central density 54- 59 F6.4 --- Xc Central X abundance 61- 66 F6.4 --- Yc Central Y abundances 68- 73 F6.4 --- XcC Central abundance of 12C 75- 80 F6.4 --- XcO Central abundance of 16O 82- 86 F5.3 --- Qconv Fractionary mass of the convective core 88- 92 F5.3 --- Qdisc Fractionary mass of the first mesh point where the chemical composition differs from the surface value 94- 99 F6.3 [solLum] log(LH) Hydrogen luminosity 101-105 F5.3 --- Q1H Fractionary mass of the inner border of the hydrogen rich region 107-111 F5.3 --- Q2H Fractionary mass of the outer border of the H-burning region 112-117 F6.3 [solLum] log(LHe) Helium luminosity 119-123 F5.3 --- Q1He Fractionary mass of the inner border of the He-burning region (when greater than zero He-burning is in a shell) 125-129 F5.3 --- Q2He Fractionary mass of the upper border of the He-burning region 131-135 F5.3 [solLum] log(LC) Carbon luminosity 137-141 F5.3 [solLum] log(Lnu) Neutrinos luminosity (absolute value) 143-147 F5.3 --- QTmax Fractionary mass of the point where the temperature attains the maximum value 149-158 A10 --- Phase Particular evolutionary stages (not explained; see J/A+AS/141/371)
Global notes: Note (G1): Initial metallicity values are: 0.0001, 0.0004, 0.001, 0.002, 0.004, 0.008, 0.017, 0.040, 0.070 Note (G2): Initial helium abundance are: 0.23, 0.26, 0.30, 0.34, 0.40, 0.46
History: * Copied at http://stev.oapd.inaf.it/YZVAR/ * 25-Apr-2010: Version including the high-mass stars, from http://stev.oapd.inaf.it/YZVAR/ References: Betelli et al., Paper I 2008A&A...484..815B
(End) Patricia Vannier [CDS] 08-Feb-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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