Is the ultraviolet spectrum of the quiet sun redshifted?

Details Is the ultraviolet spectrum of the quiet sun redshifted? Is the ultraviolet spectrum of the quiet sun redshifted?

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...244..217s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 244, no. 1, April 1991, p. 217-227.

Astronomy and Astrophysics

Astrophysics

33

Fraunhofer Lines, Oxygen Spectra, Red Shift, Schumann-Runge Bands, Solar Spectra, Ultraviolet Spectra, Absorption Spectra, Gravitational Effects, Line Spectra

Scientific paper

A wavelength shift between the Fraunhofer spectrum observed in two quiet areas of the sun and the superimposed telluric absorption spectrum of the Schuman-Runge bands due to O2 has been measured in the wavelength region 1950-2000 A. The results deduced from high resolution spectra taken on board a balloon experiment at an altitude of 39 km are presented. They show a systematic redshift of the solar lines relative to the reference telluric spectrum. After correction for the gravitational redshift and for all the known relative motions between sun and observer, the average residual redshift is 7 mA and could be from 5 to 12 mA for some individual reference lines. This corresponds in terms of velocity to an equivalent Doppler-Fizeau shift on the whole spectrum of about 1 km/s away from the observer.

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