2007/11/30 by J. G. Hartnett, John G. Hartnett, K. Hirano +1 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph #gr-qc
paper · pdf · doi:10.1007/s10509-008-9906-4
published as Astrophys.Space Sci.324:13-16, 2009 · 5 pages, 6 figures, major revision
openalex publication_date 2008/09/23 · arxiv created 2009/07/10 · arxiv updated 2010/04/14 · openalex created_date 2017/04/07 · openalex updated_date 2026/07/30
Discrete Fourier analysis on the quasar number count, as a function of redshift, z, calculated from the Sloan Digital Sky Survey DR6 release appears to indicate that quasars have preferred periodic redshifts with redshift intervals of 0.258, 0.312, 0.44, 0.63, and 1.1. However the same periods are found in the mean of the zConf parameter used to flag the reliability of the spectroscopic measurements. It follows that these redshift periods must result from some selection effect, as yet undetermined. It does not signal any intrinsic (quantized) redshifts in the quasars.