J/A+A/557/A26 STAGGER-grid of 3D stellar models. I. (Magic+, 2013)
The STAGGER-grid: A grid of 3D stellar atmosphere models.
I. Methods and general properties.
Magic Z., Collet R., Asplund M., Trampedach R., Hayek W., Chiavassa A.,
Stein R.F., Nordlund A.
<Astron. Astrophys. 557, A26 (2013)>
=2013A&A...557A..26M 2013A&A...557A..26M
ADC_Keywords: Models, atmosphere ; Stars, late-type
Keywords: convection - hydrodynamics - radiative transfer - stars: abundances -
stars: atmospheres - stars: fundamental parameters
Abstract:
We present the STAGGER-grid, a comprehensive grid of time-dependent,
three-dimensional (3D), hydrodynamic model atmospheres for late-type
stars with realistic treatment of radiative transfer, covering a wide
range in stellar parameters.
All our models were generated with the Stagger-code, using realistic
input physics for the equation of state (EOS) and for continuous and
line opacities. Our ∼220 grid models range in effective temperature,
Teff, from 4000 to 7000K in steps of 500K, in surface gravity, logg,
from 1.5 to 5.0 in steps of 0.5dex, and metallicity, [Fe/H], from
-4.0 to +0.5 in steps of 0.5 and 1.0dex.
Description:
The 3D model atmospheres presented here were constructed with a custom
version of the Stagger-code, a state-of-the-art, multipurpose,
radiative-magnetohydrodynamics (R-MHD) code originally developed by
Nordlund & Galsgaard (1995,
http://www.astro.ku.dk/~kg/Papers/MHD_code.ps.gz), and continuously
improved over the years by its user community.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 133 202 Stellar parameters
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See also:
VI/134 : Grids of ATLAS9 model atmospheres & MOOG spectra (Kirby, 2011)
VI/39 : Model Atmospheres (Kurucz, 1979)
J/A+A/550/A103 : Model 1D (LHD) & 3D (CO5BOLD) spectra (Allende Prieto+, 2013)
J/A+A/509/A14 : Grid of solar-metallicity wind models (Mattsson+, 2010)
J/ApJ/527/879 : Gravities for late-type stars (Allende Prieto+, 1999)
Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 K Teff [3935,7053] Effective temperature
9- 15 F7.5 [cm/s2] logg [1.5/5] Surface gravity
17- 24 F8.5 [Sun] [Fe/H] [-4/0.5] Metallicity
26- 32 F7.5 [dg/m3] lgrbot Logarithmic density at the bottom
(log(ρbot))
34- 40 F7.5 [cJ/g] lgebot Logarithmic internal energy per unit mass at
bottom (in 105erg/g) (log(ε_bot))
42- 48 F7.5 [K] lgTbot Logarithmic temperature at bottom
50- 56 F7.5 [10+4Pa] lgPbot Logarithmic thermodynamic pressure at the
bottom (in 105dyn/cm2 = 105dPa)
58- 64 F7.5 [hJ/g/K] Sbot Entropy at the bottom (in 109erg/g/K)
66- 73 F8.5 [hJ/g/K] DS Entropy jump ΔS=Sbot-Smin
(in 109erg/g/K)
75- 81 F7.5 [km/s] rms Maximal vertical rms-velocity
(vz,rmspeak)
83- 90 F8.5 % DIrms Intensity contrast (ΔIrms)
92- 98 F7.5 [Mm] lgSxy Logarithmic horizontal box size
100-107 F8.5 [Mm] lgSz Logarithmic vertical box size
109-116 F8.5 [Mm] lgdgran Logarithmic mean granule diameter
118-125 F8.5 [hs] lgDt Logarithmic time step logΔT, in 102s
127-133 F7.5 [hs] lgt Logarithmic total time, in 102s
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Acknowledgements:
Zazralt Magic, magic( at )mpa-garching.mpg.de,
Max-Planck-Institut fur Astrophysik
(End) Zazralt Magic [MPA] , Emmanuelle Perret [CDS] 15-Jul-2013