Papers regarding the solar redshift problem

Including especially a PDF of a 1916 paper by Evershed and Royds.

To the main page of this site: ../../ .   Robin Whittle 3 March 2006. 

On the change of wave-length of the iron lines in passing from the centre of the sun's disc
J. Evershed and T. Royds
Kodaikanal Observatory Bulletin no. XLIX  (1916)

Here is a PDF file, from photocopies kindly provided in June 2003 by the Library, Indian Institute of Astrophysics, Koramangala .
Evershed-Royds-1916.pdf (12 pages 6.9 Megabytes)
(See for how I generated this PDF from TIFF files.)
The question of redshift at the limb of the Sun's disc could, in part, be explained by a plasma-redshift mechanism - however there could be a variety of other explanations as well.  It is clearly a difficult matter to explain in all its detail, such as which lines are affected and why the relationship between limb-position and redshift differ between the lines.  The whole question of limb-shifts can only be resolved in the context of considering outward flows which should give rise to blue-shift in the centre of the disc, and in consideration of gravitational redshift (general relativity), which should affect all areas of the disc similarly, as best I know.

The 1916 Evershed and Royds paper paper is mentioned at:

Some other papers of interest

See the discussion, starting 28 February 2006, about the solar redshift / solar limb-shift at sci.physics.research:

There is an extensive literature on this matter.  Here are a few papers:

(  Search-engine bait: John Evershed, On the change of wavelength of the iron lines in passing from the centre of the sun's disc. )