Hierarchical structure in the distribution of galaxies

Details Hierarchical structure in the distribution of galaxies Hierarchical structure in the distribution of galaxies

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...311....1s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 311, Dec. 1, 1986, p. 1-5.

Astronomy and Astrophysics

Astrophysics

13

Galactic Structure, Mass Distribution, Correlation, Galactic Clusters, Galactic Evolution, Gravitation, Voids

Scientific paper

The distribution of galaxies has a hierarchical structure with power-law correlations. This is usually thought to arise from gravity alone acting on an originally uniform distributioon. If, however, the original process of galaxy formation occurs through the stimulated birth of one galaxy due to a nearby recently formed galaxy, and if this process occurs near its percolation threshold, then a hierarchical structure with power-law correlations arises at the time of galaxy formation. If subsequent gravitational evolution within an expanding cosmology is such as to retain power-law correlations, the initial r exp -1 dropoff can steepen to the observed r exp -1.8. The distribution of galaxies obtained by this process produces clustering and voids, as observed.

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