Different convection models in ATLAS

Details Different convection models in ATLAS Different convection models in ATLAS

2005-09-19

arxiv.org/abs/astro-ph/0509536v1

Mem.Soc.Ast.It. 71 (2004) 1

Astronomy and Astrophysics

Astrophysics

7 pages, 6 figures. To appear in the proceedings of the Workshop "ATLAS 12 and related codes", Trieste, July 11-15, 2005

Scientific paper

Convection is an important phenomenon in the atmospheres of A-type and cooler stars. A description of convection in ATLAS models is presented, together with details of how it is specified in model calculations. The effects of changing the treatment of convection on model structures and how this affects observable quantities are discussed. The role of microturbulence is examined, and its link to velocity fields within the atmosphere. Far from being free parameters, mixing-length and microturbulence should be constrained in model calculations.

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