Periodicity of quasar redshifts

Details Periodicity of quasar redshifts Periodicity of quasar redshifts

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...239...33a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 239, no. 1-2, Nov. 1990, p. 33-49.

Astronomy and Astrophysics

Astronomy

64

Periodic Variations, Quasars, Radio Astronomy, Red Shift, Absorption Spectra, Astronomical Catalogs, Magnitude, Power Spectra, Radio Emission

Scientific paper

It has been shown (Depaquit et al., 1985) that every test to date supports Karlsson's (1971, 1973, 1977) mathematical solution for the periodicity of quasar redshifts being Delta ln(1 + z) = 0.206. In this paper, this periodicity is reinvestigated for different subgroups of quasars. Radio selected quasars were tested in two directions in the sky (RA about 0 h and 12 h). The periodicity Delta ln(1 + z) = 0.206 was confirmed to 99 percent and 96 percent confidence levels, respectively, furnishing strong proof that the peaks cannot be due to the color- or emission-line selection effects. When the 0 h and 12 h regions were combined, the confidence level increased to 99.97 percent.

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