Physics
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979soph...62..407o&link_type=abstract
Solar Physics, vol. 62, June 1979, p. 407-412.
Physics
Chromosphere, Fraunhofer Lines, Heliostats, Solar Eclipses, Solar Spectra, Thomson Scattering, Absorption Spectra, Calcium, Continuous Spectra, Infrared Spectra, Solar Prominences
Scientific paper
Attention is drawn to a very simple instrumental arrangement for eclipse observations of the spectra of the chromosphere and prominences using a plane grating as polar heliostat and a short focus camera. A discussion is made of an infrared chromospheric spectrum showing traces of Thomson- scattered Ca II absorption lines in the continuous spectrum. If the effect is real, it indicates a temperature of the order of 5000 K. A simple vector formula is presented describing various types of Doppler effects appearing in radiation scattered by moving particles.
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