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Hydrodynamical comparison test of solar models
Author(s) -
Bach K.,
Kim Y.C.
Publication year - 2012
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201211816
Subject(s) - helioseismology , physics , convection , convection zone , adiabatic process , radiation zone , radiation , turbulence , astrophysics , mechanics , computational physics , thermodynamics , optics , quantum mechanics , magnetic field
We present three dimensional radiation‐hydrodynamical (RHD) simulations for solar surface convection based on three most recent solar mixtures: Grevesse & Sauval (1998), Asplund, Grevesse & Sauval (2005), and Asplund, Grevesse, Sauval & Scott (2009). The outer convection zone of the Sun is an extremely turbulent region composed of partly ionized compressible gases at high temperature. The super‐adiabatic layer (SAL) is the transition region where the transport of energy changes drastically from convection to radiation. In order to describe physical processes accurately, a realistic treatment of radiation should be considered as well as convection. However, newly updated solar mixtures that are established from radiation‐hydrodynamics do not generate properly internal structures estimated by helioseismology. In order to address this fundamental problem, solar models are constructed consistently based on each mixture and used as initial configurations for radiation‐hydrodynamical simulations. From our simulations, we find that the turbulent flows in each model are statistically similar in the SAL (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)