On the radio optical depth of the layer where the temperature equals the brightness temperature |
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| Authors: | Franca Chiuderi Drago |
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| Institution: | (1) Osservatorio Astrofisico di Arcetri, Firenze, Italy |
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| Abstract: | It is usually believed that the radio optical depth of the layer h* where the temperature equals the brightness temperature is independent of the frequency. This assumption is criticized from the theoretical point of view and the behaviour of  (h*) as a function of the frequency v is computed for two different solar models. |
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