Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996arep...40....6k&link_type=abstract
Astronomy Reports, Volume 40, Issue 1, January 1996, pp.6-12
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Spectral analysis of the distribution of quasars in the radial coordinate r({OMEGA}_0_,z), where {OMEGA}_0_ is the density parameter and z is redshift, has been conducted in a co-moving space. Periodicity with period 0.2 in the argument r(0, z) = 1n( 1 + z) is clearly manifested for bright objects (V < 18.5^m^), less clearly present for the total sample, and absent for samples of faint ( V => 18.5^m^) quasars. This contradicts the explanation of the periodicity by selection effects, since they should become stronger for fainter objects. The height of the corresponding peak in the power spectrum varies greatly with {OMEGA}_0_, which places limits on this parameter 0.1 < {OMEGA}_0_ < 0.6. In the distance distribution for quasars constructed using the density method, seven regular peaks were discovered. Using the least squares method, estimates were made of the position of the 8th peak (z_8_ = 3.82 +/- 0.19; a clustering of quasars was revealed at z = 3.80), the position of the 9th peak (z_9_ = 5.26 +/- 0.15), and the density parameter ({OMEGA}_0_ = 0.28 +/- 0.14). The period in the distribution of quasars (for small z) is ~600h^-1^ Mpc, where h is the Hubble constant, and exceeds the characteristic size of a large-scale structure in the distribution of galaxies by a factor of 4-5.
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