Radiation loss and mechanical heating in the low solar chromosphere

Computer Science – Sound

Scientific paper

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Chromosphere, Energy Dissipation, Solar Atmosphere, Solar Radiation, Solar Temperature, Astronomical Models, Atmospheric Heating, One Dimensional Flow, Radiative Heat Transfer, Sound Waves, Stellar Models, Velocity Distribution

Scientific paper

The paper discusses Ulmschneider's (1974) claim to have established that the short-period acoustic-wave energy input is the only one able to balance the chromospheric radiation loss. A review is given regarding the range of uncertainty in empirical and radiative-equilibrium models on which estimates of the excess radiation coming from mechanical heating rest. It is shown that Ulmschneider's estimate of this excess radiation from such models uses an oversimplified computational method. The resultant uncertainty in models and in computational methods suggest that Ulmschneider's results on excess radiation from heating in the low chromosphere is subject to overestimation by an order of magnitude.

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