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Hierarchy of spatial scales in UV prominences |
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| Authors: | B. Schmieder J. E. Wiik K. P. Dere |
| Affiliation: | (1) Observatoire de Paris, Section de Meudon, DASOP, F-92195 Meudon Principal Cedex, France;(2) Space Science Department-Sc, ESA, ESTEC Postbus 299, NL-2200 AG Noordwijk, The Netherlands;(3) E. O. Hulburt Center for Space Research, US Naval Research Laboratory, 20375-5352 Washington DC, USA |
| Abstract: | Ultraviolet spectra of a quiescent prominence observed with theHigh Resolution Telescope and Spectrograph (HRTS) are analyzed. Different techniques lead to greatly different spatial scales for the prominence structures. The UV spectra show strong variations in intensity and Doppler shift on scales larger than 1700 km. Spectroscopic diagnostics employing line intensity ratios indicate the existence of scales between 400 m to some hundred kilometers. We attempt to interpret various aspects of the prominence intensities and velocities with a multiple thread model. |
| Keywords: | Sun Prominences UV radiation |
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