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- W3140073485 abstract "Semi-empirical models of a quiescent prominence on 12 December 1972 have been deduced for four different heights. The spectral observations were made with the 13.5 m spectrogragh of the McMath telescope at Kitt Peak. The transfer, statistical equilibrium equations as coupled with the hydrostatic equilibrium, and the particle conservation equations have been solved iteratively. The models reproduce well the observed eight line profiles (H_α H_β H_γ, Call H, K and the triple infrared lines of Call at λ8498, λ8542 and λ8662) simultaneously. This study of the semi-empirical models indicates that the pressure near the surface of the prominence and the microturbulence velocity in the prominence basically do not vary with height and that the temperature decreases monotonously from the surface toward the center. We found that the temperature near the prominence surface increases only slightly with height, but that the central temperature decreases significantly, and so its gradient from center to surface increases rapidly with height. The study also indicates that near the surface of the prominence there is no radiative equilibrium and the total radiative loss has a maximum which is mainly due to L_α. The radiative loss due to Call is negligible in comparison with that due to hydrogen. At the center of the prominence we find approximate radiative equilibrium." @default.
- W3140073485 created "2021-04-13" @default.
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- W3140073485 date "1988-01-01" @default.
- W3140073485 modified "2023-09-23" @default.
- W3140073485 title "HEIGHT-VARYING SEMI-EMPIRICAL MODELS OF A QUIESCENT PROMINENCE" @default.
- W3140073485 hasPublicationYear "1988" @default.
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