J/A+A/624/A137 Stellar models and isochrones (Haemmerle+, 2019)
Stellar models and isochrones from low-mass to massive stars including
pre-main sequence phase with accretion.
Haemmerle L., Eggenberger P., Ekstrom S., Georgy C., Meynet G., Postel A.,
Audard M., Soerensen M., Fragos T.
<Astron. Astrophys. 624, A137 (2019)>
=2019A&A...624A.137H 2019A&A...624A.137H (SIMBAD/NED BibCode)
ADC_Keywords: Models, evolutionary ; Accretion
Keywords: stars: formation - stars: massive - stars: evolution -
stars: pre-main sequence - stars: protostars - stars: general
Abstract:
Grids of stellar models are useful tools to derive the properties of
stellar clusters, in particular young clusters hosting massive stars,
and to provide information on the star formation process in various
mass ranges. Because of their short evolutionary timescale, massive
stars end their life while their low-mass siblings are still on the
pre-main sequence (pre-MS) phase. Thus the study of young clusters
requires consistent consideration of all the phases of stellar
evolution. But despite the large number of grids that are available in
the literature, a grid accounting for the evolution from the pre-MS
accretion phase to the post-MS phase in the whole stellar mass range
is still lacking. We build a grid of stellar models at solar
metallicity with masses from 0.8M☉ to 120M☉, including
pre-MS phase with accretion. We use the GENEC code to run stellar
models on this mass range. The accretion law is chosen to match the
observations of pre-MS objects on the Hertzsprung-Russell diagram. We
describe the evolutionary tracks and isochrones of our models. The
grid is connected to previous MS and post-MS grids computed with the
same numerical method and physical assumptions, which provides the
widest grid in mass and age to date.
Description:
The models of the present grid have been computed with the 1D
hydrostatic GENEC stellar evolution code. A detailed description of
the code can be found in Eggenberger et al. (2008Ap&SS.316...43E 2008Ap&SS.316...43E).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
listmod.dat 30 24 List of models
models/* . 24 Individual models
listiso.dat 54 31 List of isochrones
isochrones/* . 31 Individual isochrones
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Byte-by-byte Description of file: listmod.dat
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Bytes Format Units Label Explanations
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1- 6 F6.2 Msun Mini Initial mass
8- 12 F5.3 --- Z [0.014] Metallicity
15 I1 --- V [0] Initial rotation (0 : no rotation)
17- 30 A14 --- FileNane Name of the file in subdirectory models
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Byte-by-byte Description of file (#): models/*
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Bytes Format Units Label Explanations
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1- 3 I3 --- line [1/500] Sequential number of line
5- 27 E23.8 yr Time Age
33- 45 E13.8 Msun Mass Stellar mass
50- 63 E14.8 [Lsun] log(L) Bolometric Luminosity in log scale
69- 81 E13.8 [K] log(Teff) Effective temperature in log scale
87- 99 E13.8 --- 1Hsurf 1H surface abundance
(mass fraction)
105-117 E13.8 --- 4Hesurf 4He surface abundance
(mass fraction)
123-135 E13.8 --- 12Csurf 12C surface abundance
(mass fraction)
141-153 E13.8 --- 13Csurf 13C surface abundance
(mass fraction)
159-171 E13.8 --- 14Nsurf 14N surface abundance
(mass fraction)
177-189 E13.8 --- 16Osurf 16O surface abundance
(mass fraction)
195-207 E13.8 --- 17Osurf 17O surface abundance
(mass fraction)
213-225 E13.8 --- 18Osurf 18O surface abundance
(mass fraction)
231-243 E13.8 --- 20Nesurf 20Ne surface abundance
(mass fraction)
249-261 E13.8 --- 22Nesurf 22Ne surface abundance
(mass fraction)
267-279 E13.8 --- 26Alsurf 26Al surface abundance
(mass fraction)
284-297 E14.8 --- Mcc/Mt Convective core mass fraction
303-315 E13.8 [K] log(Teff)m Effective temperature, without winds
correction in log scale
320-333 E14.8 [Ms/yr] log(dM/dt) Accretion/mass loss rate in log scale
338-351 E14.8 [g/cm3] log(rhoc) Central density in log scale
357-369 E13.8 [K] log(Tc) Central temperature in log scale
375-387 E13.8 --- 1Hcen 1H central abundance
(mass fraction)
393-405 E13.8 --- 4Hecen 4He central abundance
(mass fraction)
411-423 E13.8 --- 12Ccen 12C central abundance
(mass fraction)
429-441 E13.8 --- 13Ccen 13C central abundance
(mass fraction)
447-459 E13.8 --- 14Ncen 14N central abundance
(mass fraction)
465-477 E13.8 --- 16Ocen 16O central abundance
(mass fraction)
483-495 E13.8 --- 17Ocen 17O central abundance
(mass fraction)
501-513 E13.8 --- 18Ocen 18O central abundance
(mass fraction)
519-531 E13.8 --- 20Necen 20Ne central abundance
(mass fraction)
537-549 E13.8 --- 22Necen 22Ne central abundance
(mass fraction)
555-567 E13.8 --- 26Alcen 26Al central abundance
(mass fraction)
573-585 E13.8 s-1 Omegasurf Surface angular velocity
591-603 E13.8 s-2 Omegacen Central angular velocity
609-621 E13.8 --- Rp/Req Ratio of polar to equatorial radius
(Rpol/Req)
627-639 E13.8 --- Md/Md(0) Mass-loss correction due to rotation
645-657 E13.8 km/s vcrit1 First critical velocity
663-675 E13.8 km/s vcrit2 Second critical velocity
681-693 E13.8 km/s vequa Equatorial velocity
699-711 E13.8 --- Om/Omcr Ratio of angular velocity to critical
velocity (Omegsurf/Omegcen)
717-729 E13.8 --- GammaEd Eddington factor {GAMMA}
735-747 E13.8 [Msun/yr] log(dM/dtm) Mechanical mass loss dM/dt
in log scale
753-765 E13.88 [10+53g.cm2/s] Ltot Total angular momentum in log scale
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Byte-by-byte Description of file: listiso.dat
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Bytes Format Units Label Explanations
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1- 6 F6.4 --- Z Initial metallicity
8- 11 F4.2 km/s Vini [0] Initial rotation (0 : no rotation)
13- 18 F6.3 yr logt Age, in log scale
20- 54 A35 --- FileName Name of the file in subdirectory isochrones
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Byte-by-byte Description of file (#): isochrones/*
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Bytes Format Units Label Explanations
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1- 7 F7.3 Msun Mini Mass at the end of accretion
10- 17 F8.6 --- Zini Initial metallicity
20- 24 F5.3 --- OmOcini Initial angular velocity (ratio to critical
velocity) Ωsurf/Ωcen
27- 33 F7.3 Msun M Current Mass
37- 43 F7.4 [Lsun] logL Bolometric luminosity in log scale
48- 53 F6.4 [K] logTec Effective temperature, with winds
correction in log scale
58- 63 F6.4 [K] logTenc Effective temperature, without winds
correction in log scale
66- 73 F8.4 mag MBol Bolometric magnitude
76- 83 F8.4 mag VMAG Absolute V magnitude
87- 93 F7.4 mag U-B U-B colour index
97-103 F7.4 mag B-V B-V colour index
107-113 F7.4 mag V-K V-K colour index
117-123 F7.4 mag V-R V-R colour index
127-133 F7.4 mag V-I V-I colour index
137-143 F7.4 mag J-K J-K colour index
147-153 F7.4 mag H-K H-K colour index
157-163 F7.4 mag G-V G-V colour index (G for Gaia G band)
167-173 F7.4 mag Gbp-V Gbp-V colour index (Gbp for Gaia BP band)
177-183 F7.4 mag Grp-V Grp-V colour index (Grp for Gaia RP band)
188-193 F6.4 mag Gflag [0] Gaia flag
197-203 F7.4 mag BC Bolometric correction
206-214 E9.4 --- rpol Polar radius
217-222 F6.4 --- oblat Oblateness (Rpol/Req)
225-230 F6.3 --- gpol Polar gravity
233-241 E9.4 --- OmegaS Surface angular velocity
248-251 F4.2 km/s veq Equatorial velocity
258-261 F4.2 km/s vcrit1 First critical velocity
268-271 F4.2 km/s vcrit2 Second critical velocity
274-279 F6.4 --- Om/Omcr Angular velocity (ratio to critical
velocity) Ωsurf/Ωcen
281-287 F7.3 [Msun/yr] log(dM/dt) Accretion/mass loss rate in log scale
291-295 F5.3 [Msun/yr] log(dM/dtm) Mechanical mass loss dM/dt in log scal
298-303 F6.4 --- GammaEd Eddington factor {GAMMA}
306-314 E9.4 --- H1 1H surface abundance (mass fraction)
317-325 E9.4 --- He4 4He surface abundance (mass fraction)
328-336 E9.4 --- C12 12C surface abundance (mass fraction)
339-347 E9.4 --- C13 13C surface abundance (mass fraction)
350-358 E9.4 --- N14 14N surface abundance (mass fraction)
361-369 E9.4 --- O16 16O surface abundance (mass fraction)
372-380 E9.4 --- O17 17O surface abundance (mass fraction)
383-391 E9.4 --- O18 18O surface abundance (mass fraction)
394-402 E9.4 --- Ne20 20Ne surface abundance (mass fraction)
405-413 E9.4 --- Ne22 22Ne surface abundance (mass fraction)
416-424 E9.4 --- Al26 26Al surface abundance (mass fraction)
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Acknowledgements:
Lionel Haemmerle, lionel.haemmerle(at)gmail.com
(End) Patricia Vannier [CDS] 18-Mar-2019