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Spatial Distribution of Quasars

Published online by Cambridge University Press:  19 July 2016

Yaoquan Chu  and
LiZhi Fang
Yaoquan Chu
Affiliation:
Center for Astrophysics, University of Science and Technology of China, Hefei, Anhui, The People's Republic of China
LiZhi Fang
Affiliation:
Center for Astrophysics, University of Science and Technology of China, Hefei, Anhui, The People's Republic of China

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The distribution of quasars has become one of the most interesting problems in observational cosmology. This is due mainly to the development of theory of the formation of large scale structure in the universe. In recent years, several scenarios of clustering have been proposed. In the adiabatic case, the clustering process is from larger scales to smaller ones, i.e., the first systems to form out would be on the scale of superclusters, then these systems fragment to form smaller scale systems such as galaxies. In the isothermal case, the clustering is from smaller scales to larger ones, namely, galaxies condense out at first and larger scale systems, such as clusters and superclusters, then form later via hierachical build-up processes. In the universe contain two components, the scenario of clustering might be different from both standard adiabatic and isothermal cases(1). According to this new scenario, there should be two kinds of small scale objects, one is formed due to fragment of larger scale systems, another is formed before large scale systems form.

Type
Chapter XI: Quasi-Stellar Objects: Distribution and General Properties
Information
Symposium - International Astronomical Union , Volume 124: Observational Cosmology , 1987 , pp. 627 - 638
Copyright
Copyright © Reidel 1987 

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