The effect of scattering on the temperature stratification of 3d model atmospheres of metal-poor red giants
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Collet, Remo
Hayek, Wolfgang
Asplund, Martin
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Abstract
We study the effects of different approximations of scattering in 3D radiationhydrodynamics simulations on the photospheric temperature stratification of metal-poor red giant stars. We find that assuming a Planckian source function and neglecting the contribution of scattering to extinction in optically thin layers provides a good approximation of the effects of coherent scattering on the photospheric temperature balance.
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Astrophysical Dynamics: From Stars to Galaxies
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