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Pure helium 3D model atmospheres of white dwarfs

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Figure

Figure 1. Thepure-helium compositions. Open and filled circles denote modelswith bottom boundaries that are open and closed to convective Teff and log g of our 3D model atmospheres withflows, respectively.
Figure 2. The total opacity as a function of the logarithm of wavelength for representative layers of two BW11T log g = 8.0 models ateff = 14 000 K (left) and Teff = 34 000 K (right)
Figure 3. Atmospheric line forming regions for 1D ATMO (solid red) and ⟨3D⟩ (dashed blue) spectra as defined by τR(τν = 1), wherethe plasma becomes optically thin for photons of frequency ν.
Figure 4. Temperature stratifications of spectral line forming regions forτ ⟨3D⟩ (dashed blue), 1D ATMO (dot-dashed red) and 1D LHD(dotted green) models
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