Red shift of spectral lines in the sun's chromosphere

Details Red shift of spectral lines in the sun's chromosphere Red shift of spectral lines in the sun's chromosphere

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989itps...17..238m&link_type=abstract

IEEE Transactions on Plasma Science (ISSN 0093-3813), vol. 17, April 1989, p. 238-244.

Physics

4

Bremsstrahlung, Chromosphere, Earth Atmosphere, Line Shape, Red Shift, Solar Spectra, Black Body Radiation, Maxwell Equation, Polynomials, Radial Velocity, Solar Atmosphere

Scientific paper

An unexplained center-to-limb variation (CLV) of solar wavelengths has been known for 75 years. A theory is described which not only explains the CLV but also predicts its amplitude without the use of any adjustable parameter. The model considered is based on the fact that the momentum transfer of the solar photons to the electrons of solar-atmosphere atoms produces secondary radiation due to bremsstrahlung. The energy of this bremsstrahlung radiation is taken away from the energy of the initial photons and leads to a red shift. No ad hoc parameters are used, and all constants are either fundamental physical constants or well known solar parameters. The model can explain the variation of the CLV as a function of its position on the disk and near the limb, and even the change in the line shapes, especially near the limb.

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