Density and temperature determination of neutral hydrogen in coronal structures

Details Density and temperature determination of neutral hydrogen in coronal structures Density and temperature determination of neutral hydrogen in coronal structures

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...75..139b&link_type=abstract

Solar Physics, vol. 75, Jan. 1982, p. 139-143.

Physics

9

Hydrogen Plasma, Plasma Density, Plasma Temperature, Solar Corona, Filtergrams, Lyman Alpha Radiation, Neutral Gases, Optical Thickness, Plasma Spectra, Solar Spectra

Scientific paper

Loop-shaped structures that may be interpreted as absorption features over the solar surface are exhibited by high-resolution filtergrams in Lyman-alpha that were obtained with a rocket-borne instrument. By determining the shape and dimensions of these coronal structures from the images, and measuring their optical thickness with respect to nearby, unabsorbed disk features, the calculation of the neutral hydrogen temperature and density is possible. It is found that temperatures below 100,000 K, and densities of a few tens of thousands of hydrogen atoms/cu cm, are compatible with the opacities observed in the structures.

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