Interpretation of H-alpha contrast profiles of chromospheric fine structures

Details Interpretation of H-alpha contrast profiles of chromospheric fine structures Interpretation of H-alpha contrast profiles of chromospheric fine structures

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...42...53c&link_type=abstract

Solar Physics, vol. 42, May 1975, p. 53-66.

Physics

10

Chromosphere, Fine Structure, H Alpha Line, Limb Darkening, Solar Spectra, Astronomical Models, Luminous Intensity, Solar Atmosphere, Solar Limb

Scientific paper

Recent observations of the H-alpha contrast profiles of identifiable chromospheric fine structures are interpreted in terms of an empirical model. It is shown that the parameters inferred from an application of Beckers' 'cloud' model are unreliable, and the problem of line asymmetries is re-examined. Quantitative models for the H-alpha chromosphere near the limb suggest that the 'dark band' phenomenon is due to low opacity in the neighborhood of the temperature minimum, while the peculiar appearance of mottle contrast profiles near the limb is explained in terms of foreground absorption.

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