Journal of The Korean Astronomical Society (천문학회지)
- Volume 18 Issue 1
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- Pages.15-31
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- 1985
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- 1225-4614(pISSN)
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- 2288-890X(eISSN)
HEATING OF SUNSPOT CHROMOSPHERES BY SLOW-MODE ACOUSTIC SHOCK WAVES
- Lee, Myung-Gyoon (Department of Astronomy Seoul National University) ;
- Yun, Hong-Sik (Department of Astronomy Seoul National University)
- Published : 1985.06.30
Abstract
Making use of the arbitrary shock theory developed by Ulmschneider (1967, 1971) and Ulmschneider and Kalkofen (1978), we have calculated the dissipation rates of upward-travelling slow-mode acoustic shock waves in umbral chromospheres for two umbral chromosphere models, a plateau model by Avrett (1981) and a gradient model by Yun and Beebe (1984). The computed shock dissipation rates are compared with the radiative cooling rate given by Avrett (1981). The results show that the slow-mode acoustic shock waves with a period of about 20 second can heat the low umbral chromospheres travelling with a mechanical energy flux of
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