The He I lambda 10,830 line as a coronal hole indicator - The theoretical aspect

Details The He I lambda 10,830 line as a coronal hole indicator - The theoretical aspect The He I lambda 10,830 line as a coronal hole indicator - The theoretical aspect

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pazh...13..610p&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 13, July 1987, p. 610-615. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

1

Coronal Holes, Helium Ions, Solar Spectra, Chromosphere, Ultraviolet Spectra

Scientific paper

It is shown that measurements of the central intensity of the He I
λ10830 line can be used to numerically estimate the coronal UV
flux illuminating the chromosphere. The analysis is based on non-LTE
calculations of He I level populations. The VAL-C model atmosphere was
used with additional coronal UV-illumination considered as a parameter.

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