Solar gravitational redshift

Details Solar gravitational redshift Solar gravitational redshift

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980soph...66..245l&link_type=abstract

Solar Physics, vol. 66, June 1980, p. 245-249.

Physics

3

Line Spectra, Red Shift, Solar Gravitation, Solar Spectra, Atmospheric Circulation, Iron, Solar Atmosphere, Solar Physics, Spectrum Analysis

Scientific paper

Wavelengths of solar spectrum lines should be shifted toward the red by the sun's gravitational field as predicted by metric theories of gravity according to the principle of equivalence. Photographic wavelengths of 738 solar Fe I lines and their corresponding laboratory wavelengths have been studied. The measured solar wavelength minus the laboratory wavelength averaged for the strong lines agrees well with the theoretically predicted shift. Studies show that the departures depend on line strength. No dependence of the departures on wavelength was found within the existing data. By studying strong lines over a wide spectral range, velocity shifts caused by the complex motions in the solar atmosphere seem to affect the results in a minimal fashion.

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