J/A+A/573/A90 STAGGER-grid of 3D stellar models. IV. (Magic+, 2015)
The Stagger-grid: A grid of 3D stellar atmosphere models.
IV. Limb darkening coefficients.
Magic Z., Chiavassa A., Collet R., Asplund M.
<Astron. Astrophys. 573, A90 (2015)>
=2015A&A...573A..90M 2015A&A...573A..90M
ADC_Keywords: Models, atmosphere ; Stars, late-type
Keywords: convection - hydrodynamics - radiative transfer - stars: atmospheres -
binaries: eclipsing - planetary systems
Abstract:
We compute the emergent stellar spectra from the UV to far infrared
for different viewing angles using realistic 3D model
atmospheres for a large range in stellar parameters to predict the
stellar limb darkening.
We have computed full 3D LTE synthetic spectra based on 3D radiative
hydrodynamic atmosphere models from the Stagger-grid in the ranges:
Teff from 4000 to 7000K, logg from 1.5 to 5.0, and [Fe/H], from -4.0
to +0.5. From the resulting intensities at different wavelength, we
derived coefficients for the standard limb darkening laws considering
a number of often-used photometric filters. Furthermore, we calculated
theoretical transit light curves, in order to quantify the differences
between predictions by the widely used 1D model atmosphere and our 3D
models.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 115 3663 Limb darkening coefficients derived from 3D RHD models
in the Kepler filter for different stellar parameters
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See also:
J/A+A/557/A26 : STAGGER-grid of 3D stellar models. I. (Magic+, 2013)
J/A+A/560/A8 : STAGGER-grid of 3D stellar models. II. (Magic+, 2013)
J/A+A/573/A89 : STAGGER-grid of 3D stellar models. III. (Magic+, 2014)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 K Teff [3935/7053] Effective temperature [K]
9- 12 F4.2 [cm/s2] logg [1.5/5] Surface gravity [dex]
14- 18 F5.2 [Sun] [Fe/H] [-3/0] Metallicity [Fe/H] [dex]
20- 28 A9 --- System Photometric system (1)
30- 34 A5 --- Band Band in photometric system (1)
37- 43 F7.5 --- u Linear law limb darkening coefficient u (2)
45- 52 F8.5 --- a Quadratic law limb darkening coefficient a (2)
54- 61 F8.5 --- b Quadratic law limb darkening coefficient b (2)
63- 70 F8.5 --- c Square root law limb darkening coefficient c (2)
72- 79 F8.5 --- d Square root law limb darkening coefficient d (2)
81- 88 F8.5 --- a1 Four-parameter law limb darkening coefficient (2)
90- 97 F8.5 --- a2 Four-parameter law limb darkening coefficient (2)
99-106 F8.5 --- a3 Four-parameter law limb darkening coefficient (2)
108-115 F8.5 --- a4 Four-parameter law limb darkening coefficient (2)
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Note (1): system/bands are:
* bessell: j h k
* corot
* johnson: u b v r i j k
* kepler
* mk (Mauna Kea): j hmk k kmk kp kpmk ks ksmk l lp m mp1 blka
* sdss: u g r i z
* stromgren: u v b y
* wfc3: grism
Note (2): Limb-Darkenbing Coefficients:
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(1) Linear I(µ)/I(1) = 1-u(1-µ)
(2) Quadratic I(µ)/I(1) = 1-a(1-µ)-b(1-µ)2
(3) Square root I(µ)/I(1) = 1-c(1-µ)-d(1-sqrt(µ))
(4) Four-parameter I(µ)/I(1) = 1 - a1*(1-µ0.5) - a2*(1-µ)
- a3*(1-µ1.5) - a4*(1-µ2)
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Acknowledgements:
Zaz Magic, magic(at)MPA-Garching.MPG.DE
References:
Magic et al., Paper I 2013A&A...557A..26M 2013A&A...557A..26M, Cat. J/A+A/557/A26
Magic et al., Paper II 2013A&A...560A...8M 2013A&A...560A...8M, Cat. J/A+A/560/A8
Magic et al., Paper III 2015A&A...573A..90M 2015A&A...573A..90M, Cat. J/A+A/573/A89
(End) Patricia Vannier [CDS] 07-Oct-2014