The Effect of Scattering on the Temperature Stratification of 3D Model Atmospheres of Metal-Poor Red Giants
Abstract
We study the effects of different approximations of scattering in 3D radiation-hydrodynamics 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.
- Publication:
-
Astrophysical Dynamics: From Stars to Galaxies
- Pub Date:
- August 2011
- DOI:
- 10.1017/S1743921311017856
- Bibcode:
- 2011IAUS..271..373C
- Keywords:
-
- stars: atmospheres;
- convection;
- hydrodynamics;
- radiative transfer;
- scattering;
- methods: numerical