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3-D Convection Models: Are They Compatible with 1-D Models?

Published online by Cambridge University Press:  12 April 2016

Å. Nordlund  and
R. F. Stein
Å. Nordlund
Affiliation:
Theoretical Astrophysics Center and Astronomical Observatory, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark
R. F. Stein
Affiliation:
Physics and Astronomy Department, Michigan State University, East Lansing, MI 48824, USA

Abstract

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We review properties of stellar convection, as derived from detailed 3-D numerical modeling, and assess to what extent 1-D models are able to provide a fair representation of stellar structure in various regions of the HR diagram. We point out a number of problems and discrepancies that are inevitable when using conventional 1-D models. The problems originate mainly in the surface layers, where horizontal fluctuations become particularly large, and where convective energy transport gives way to radiation. We conclude that it is necessary (and possible) to use three-dimensional models of these layers, in order to avoid the uncertainties and inaccuracies associated with 1-D representations.

Type
Part 5. Theoretical Models of Classical Pulsating Stars
Information
International Astronomical Union Colloquium , Volume 176: The Impact of Large-Scale Surveys on Pulsating Star Research , 2000 , pp. 362 - 372
Copyright
Copyright © Astronomical Society of the Pacific 2000

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