Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...261l..65s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 261, Oct. 15, 1982, p. L65-L69. NSF-supported research.
Astronomy and Astrophysics
Astrophysics
7
Astronomical Catalogs, Cross Correlation, Galactic Clusters, Angular Distribution, Autocorrelation, Position (Location)
Scientific paper
The angular positions of 3769 galaxies brighter than 15th mag in three subsets of the Zwicky catalog are cross-correlated with Shane-Wirtanen (SW) galaxy counts in the original 10 x 10 arcmin cells. The cross-correlation function is compared with the autocorrelation function of the high-resolution version of the SW catalog. It is found that the cross-correlation function is given by a power law with an exponent of 1 - gamma, where gamma = 1.81 + or - 0.03, and that the function breaks sharply from the power law at an angular scale of about 2.6 deg. The scale is shown to be similar to the one at which a similar break was discovered in the autocorrelation function of the SW catalog. It is concluded that the break is a local feature rather than a feature intrinsic to the clustering of galaxies and may be explained in terms of clumpy obscuration in the Galaxy with a characteristic scale of about 2 deg.
Seldner M.
Uson Juan M.
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