On the mechanical heating of the external layers of the sun - A methodological discussion

Details On the mechanical heating of the external layers of the sun - A methodological discussion On the mechanical heating of the external layers of the sun - A methodological discussion

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mmsai..47..365s&link_type=abstract

Società Astronomica Italiana, Memorie, vol. 47, Sept. 1976, p. 365-376.

Astronomy and Astrophysics

Astronomy

1

Atmospheric Heating, Closure Law, Kinetic Heating, Mathematical Models, Stellar Atmospheres, Stellar Models, Acoustics, Atmospheric Turbulence, Convective Flow, Mixing Length Flow Theory, Shock Heating, Solar Atmosphere, Solar Corona

Scientific paper

Theoretical treatments of the mechanical heating of the external layers of stars are reviewed; the problem is posed as one of stationary nonhomogeneous turbulence (that is, the Rayleigh-Benard problem) with the essential difficulty lying in the solution of a hierarchy of equations of motion, mass and energy through a chosen closure hypothesis. In particular, the closure relation proposed by Schwarzschild (1948), which makes reference to acoustic waves, and the closure hypothesis of Schatzman (1949), a more general treatment based on linear acoustics, are analyzed. It is suggested that a description of the propagation of an isolated unsustained shock in a homogeneous compressible fluid at rest, developed by Brinkley and Kirkwood (1947), may be quite effectively applied to the problem of the heating of the solar atmosphere.

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