Shifts of spectral lines emitted from stars

Details Shifts of spectral lines emitted from stars Shifts of spectral lines emitted from stars

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982tuasr....q...1m&link_type=abstract

Tokyo, University, Institute of Space and Astronautical Science, Report no. 600, July 1982, p. 1-8.

Astronomy and Astrophysics

Astronomy

Cosmic Plasma, Cosmology, Doppler Effect, Hubble Constant, Line Spectra, Stellar Spectra, Helium Ions, Relativity

Scientific paper

The shifting of the spectral line emitted from a star due to the Doppler effect or the plasma shift, is separately discussed. The Doppler effect formulas are set forth, the discrepancies in the Hubble constant are summarized, and the explanation of the Hubble law by a Friedmann model of the Universe is described. The latter indicates that the Hubble constant need not be constant for different regions in the Universe. The shifts of spectral lines emitted from the symbiotic CI Cygni in the quiescent state due to plasma shift is explained in detail. The expanding velocity of the envelope is assumed to be negligible. The spectral lines emitted from CI Cygni are shown, as is the plasma shift of hydrogenlike lines, the plot of plasma shift of He II wavelength 4686 A versus electron density, and the plasma shift of isolated lines at electron density of 10 to the 16th per cubic centimeter.

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