Unknown selection effect simulates redshift periodicity in quasar number counts from Sloan Digital Sky Survey

Details Unknown selection effect simulates redshift periodicity in quasar number counts from Sloan Digital Sky Survey Unknown selection effect simulates redshift periodicity in quasar number counts from Sloan Digital Sky Survey

2007-12-22

arxiv.org/abs/0712.3833v3

Astrophys.Space Sci.324:13-16, 2009

Astronomy and Astrophysics

Astrophysics

5 pages, 6 figures, major revision

Scientific paper

10.1007/s10509-008-9906-4

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.

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