Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.260..705e&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 260, no. 4, p. 705-716.
Astronomy and Astrophysics
Astronomy
25
Galactic Clusters, Power Spectra, Spatial Distribution, Northern Hemisphere, Southern Hemisphere
Scientific paper
The power spectrum of the distribution of clusters of galaxies in the northern and southern galactic hemispheres has been evaluated. Corrections have been applied for the smoothing effect, and for the Poisson noise. The effects of incompleteness of data and observational errors have been investigated. The cluster spectrum has been transformed to galaxy and matter power spectra. Data suggest that the power spectrum has an index in the range of -2 and -1 on intermediate scales; on very large scales the spectrum is consistent with the Harrison-Zeldovich index n = 1. The transition from the Harrison-Zeldovich index to a lower index occurs at the scale lambda(t) is approximately equal to 150 +/- 50/h Mpc. Direct comparison of the samples used and power-spectrum analysis suggest that our samples approach the size of fair samples of the universe.
Einasto Jaan
Gramann Mirt
Saar Enn
Tago Erik
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