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The Peak/Dip Picture of the Cosmic Web

Published online by Cambridge University Press:  12 October 2016

Graziano Rossi
Graziano Rossi*
Affiliation:
Department of Astronomy and Space Science, Sejong University, Seoul, 143-747, Korea email: graziano@sejong.ac.kr
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Abstract

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The initial shear field plays a central role in the formation of large-scale structures, and in shaping the geometry, morphology, and topology of the cosmic web. We discuss a recent theoretical framework for the shear tensor, termed the ‘peak/dip picture’, which accounts for the fact that halos/voids may form from local extrema of the density field – rather than from random spatial positions; the standard Doroshkevich's formalism is generalized, to include correlations between the density Hessian and shear field at special points in space around which halos/voids may form. We then present the ‘peak/dip excursion-set-based’ algorithm, along with its most recent applications – merging peaks theory with the standard excursion set approach.

Keywords

Methods: analyticalstatisticalnumerical; cosmology: theorylarge-scale structure of universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web , June 2014 , pp. 57 - 60
Copyright
Copyright © International Astronomical Union 2016 

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