Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ap%26ss.324...13h&link_type=abstract
Astrophysics and Space Science, Volume 324, Issue 1, pp.13-16
Astronomy and Astrophysics
Astrophysics
5
Quasars, Sdss Survey, Redshift Abundances, Fourier Analysis, Selection Effect
Scientific paper
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 in Sloan survey data. However this result does not rule out the possibility as found in earlier studies of other data.
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