Implications of quasar spectroscopy for constancy of constants

Details Implications of quasar spectroscopy for constancy of constants Implications of quasar spectroscopy for constancy of constants

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983rspta.310..245p&link_type=abstract

(Royal Society, Discussion on the Constants of Physics, London, England, May 25, 26, 1983) Royal Society (London), Philosophical

Physics

11

Astronomical Spectroscopy, Constraints, Quasars, Absorption Spectra, Fine Structure, Gyromagnetism, Line Spectra, Red Shift, Time Constant, Universe

Scientific paper

The contribution made by astrophysical observations of the spectra of distant galaxies and quasars to the placing of limits on the past variability of certain dimensionless ratios of physics is reviewed. The fine structure constant has been found to be constant with a standard error of about one percent for redshifts up to about 2.5. The proton mass ratio has been found to be the same as now to within a 10 percent error for redshifts between 2.1 and 2.7. A similar limit has been placed on the gyromagnetic ratio of the proton. The constancy of these constants in causally unconnected parts of the universe shows that the constants had their present values impressed on them at a very early stage before the present expansion phase of the universe.

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