J/A+A/541/A41 Basic tracks at Zinit=0.006 (Mowlavi+, 2012)
Stellar mass and age determinations.
I. Grids of stellar models from Z=0.006 to 0.04 and M=0.5 to 3.5 M☉.
Mowlavi N., Eggenberger P., Meynet G., Ekstrom S., Georgy C., Maeder A.,
Charbonnel C., Eyer L.
<Astron. Astrophys. 541, A41 (2012)>
=2012A&A...541A..41M 2012A&A...541A..41M
ADC_Keywords: Models, evolutionary
Keywords: stars: evolution - stars: fundamental parameters - stars: low-mass -
Hertzsprung-Russell diagram
Abstract:
We present dense grids of stellar models suitable for comparison with
observable quantities measured with great precision, such as those
derived from binary systems or planet-hosting stars.
We computed new Geneva models without rotation at metallicities
Z=0.006, 0.01, 0.014, 0.02, 0.03, and 0.04 (i.e. [Fe/H] from
-0.33 to +0.54) and with mass in small steps from 0.5 to 3.5M☉.
Great care was taken in the procedure for interpolating between tracks
in order to compute isochrones.
Description:
File header:
Indicates the number of tracks included in the file, and then lists the
different tracks one after the other. For each track, a track header first
summarizes general information on the track. Those are:
- the type of track;
- the metallicity, either Zinit or Zsurf depending on the type of track;
- the age or the stellar mass of the track, depending on whether it is an
isochrone or not;
- the number of models in the track;
- the model indexes of the reference points in the track. The reference
points define phases in the following way:
- phase 20: starts at the ZAMS,
- phase 21: starts at the second (after ZAMS) reference point on the MS,
- phase 22: starts at the third reference point, which corresponds to the
occurrence of the first turn-off point on the MS or to the equivalent
point if there is no hook,
- phase 23: starts at the fourth reference point, which corresponds to
the occurrence of the second turn-off point on the MS, or to the
equivalent point if there is no hook,
- phase 30: starts at the TAMS,
- phase 31: base of the red giant branch.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
models.dat 110 234 List of models (39 tracks by table)
grids/* . 6 Tables with grids of Geneva stellar models
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See also:
VI/65 : Evolutionary models of evolved stars (Dorman+ 1993)
VI/96 : Evolutionary Sequences (Fagotto+ 1993-96)
VI/102 : Geneva stellar evolution tracks & isochrones (Lejeune+, 2001)
VI/109 : Population Synthesis Models at very low metallicities
(Schaerer, 2003)
VI/118 : Stellar Models until He burning (Claret+ 1995-1998)
VI/120 : High-resolution synthetic stellar library (Coelho+, 2005)
J/A+A/299/755 : Stellar evolution. II. Post-AGB (Bloecker+, 1995)
J/A+A/424/919 : Stellar models grids. Z=0.02, M=0.8 to 125 (Claret, 2004)
J/A+A/440/647 : New grids of stellar models. II. (Claret, 2005)
J/A+A/453/769 : New grids of stellar models. III. (Claret+, 2006)
J/A+A/467/1389 : New grids of stellar models. IV. (Claret, 2007)
J/A+A/537/A146 : Stellar models with rotation. 0.8<M<120, Z=0.014
(Ekstrom+, 2012)
J/A+A/540/A26 : Low-mass stars Pisa Evolution Models (Dell'Omodarme+, 2012)
J/A+AS/96/269 : Stellar Models from 0.8 to 120 Msolar (Schaller+, 1992)
J/A+AS/98/523 : Grids of stellar models. II. (Schaerer+ 1993)
J/A+AS/101/415 : Grids of stellar models III. (Charbonnel+ 1993)
J/A+AS/102/339 : Grids of stellar models IV (Schaerer+, 1993)
J/A+AS/103/97 : Grids of stellar models V. (Meynet+ 1994)
J/A+AS/115/339 : Stellar models VI. (Charbonnel+, 1996)
J/A+AS/128/471 : Grids of stellar models. VII. (Mowlavi+ 1998)
J/A+AS/135/405 : Grids of stellar models. VIII. (Charbonnel+ 1999)
J/A+AS/109/441 : Stellar models until He burning - I. (Claret, 1995)
J/A+AS/114/549 : Stellar models until He burning - II. (Claret+, 1995)
J/A+AS/125/439 : Stellar models until He burning - III. (Claret+, 1997)
J/MNRAS/298/525 : Stellar evolution models for Z=0.0001 to 0.03 (Pols+ 1998)
Byte-by-byte Description of file: models.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- FileName Name of the file, in subdirectory grids
14- 19 F6.4 --- Zinit Initial Z abundance
21- 24 F4.2 Msun Minit Intitial mass
25- 26 A2 --- --- [0]
28- 40 E13.8 yr Age20 Phase 20 starting age (with first model at 0)
42- 54 E13.8 yr Age21 Phase 21 starting age (with first model at 100)
56- 68 E13.8 yr Age22 Phase 22 starting age (with first model at 200)
70- 82 E13.8 yr Age23 Phase 23 starting age (with first model at 300)
84- 96 E13.8 yr Age30 Phase 30 starting age (with first model at 380)
98-110 E13.8 yr Age31 Phase 31 starting age (with first model at 600)
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Byte-by-byte Description of file (#): grids/*
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Bytes Format Units Label Explanations
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1- 4 I4 --- Model [0/600] Model index
6- 8 I3 --- Phase [20/31] Phase of the model
12- 24 E13.8 yr Age Age
27- 30 F4.2 Msun Mass [0.5/3.5] Stellar mass
31- 34 A4 --- --- [0]
37- 45 F9.6 [Lsun] logL Logarithm of the surface luminosity
47- 54 F8.6 [K] logTe Logarithm of the effective temperature
58- 65 F8.6 [g/cm3] logrhoc Logarithm of the central density
67- 74 F8.6 [K] logTc Logarithm of the central temperature
76- 82 F7.4 --- Qcc Mass of the convective core relative to
the stellar mass
86- 96 E11.6 --- Xc(H) Hydrogen mass fraction at the center
98-108 E11.6 --- Xc(3He) Helium (3He) mass fraction at the center
110-120 E11.6 --- Xc(4He) Helium (4He) mass fraction at the center
122-132 E11.6 --- Xc(12C) Carbon (12C) mass fraction at the center
134-144 E11.6 --- Xc(13C) Carbon (13C) mass fraction at the center
146-156 E11.6 --- Xc(14N) Nitrogen (14N) mass fraction at the center
158-168 E11.6 --- Xc(16O) Oxygen (16O) mass fraction at the center
170-180 E11.6 --- Xc(17O) Oxygen (17O) mass fraction at the center
182-192 E11.6 --- Xc(18O) Oxygen (18O) mass fraction at the center
194-204 E11.6 --- Xc(20Ne) Neon (20Ne) mass fraction at the center
206-217 E12.6 --- Xc(22Ne) Neon (22Ne) mass fraction at the center
220-230 E11.6 --- Xs(H) Hydrogen mass fraction at the surface
232-242 E11.6 --- Xs(3He) Helium (3He) mass fraction at the surface
244-254 E11.6 --- Xs(4He) Helium (4He) mass fraction at the surface
256-266 E11.6 --- Xs(12C) Carbon (12C) mass fraction at the surface
268-278 E11.6 --- Xs(13C) Carbon (13C) mass fraction at the surface
280-290 E11.6 --- Xs(14N) Nitrogen (14N) mass fraction at the surface
292-302 E11.6 --- Xs(16O) Oxygen (16O) mass fraction at the surface
304-314 E11.6 --- Xs(17O) Oxygen (17O) mass fraction at the surface
316-326 E11.6 --- Xs(18O) Oxygen (18O) mass fraction at the surface
328-338 E11.6 --- Xs(20Ne) Neon (20Ne) mass fraction at the surface
340-350 E11.6 --- Xs(22Ne) Neon (22Ne) mass fraction at the surface
354-357 F4.2 [Msun] Minit [0.5/3.5] Stellar mass of the initial model
of the evolutionary track from which this
model has been computed
358-361 A4 --- --- [0]
363-370 F8.6 --- Xinit [0.66/0.75] Hydrogen mass fraction of the
initial model of the evolutionary track from
which this model has been computed
372-379 F8.6 --- Yinit [0.25/0.30] Helium mass fraction of the
initial model of the evolutionary track from
which this model has been computed
381-386 F6.4 --- Zinit [0.006/0.04] Metallicity mass fraction of the
initial model of the evolutionary track
from which this model has been computed
387-388 A2 --- --- [0]
390-397 F8.6 --- Zsurf Surface metallicity
400-407 F8.5 Rsun R Stellar radius
409-416 F8.5 [Sun] logrho Logarithm of the mean stellar density relative
to the solar mean density, with
ρ☉=1.411g/cm3
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Acknowledgements:
Nami Mowlavi, Nami.Mowlavi(at)unige.ch
(End) Patricia Vannier [CDS] 16-Apr-2012