Non-Gaussian features of linear cosmic string models

• Type: Article in International Scientific Journal
• Date: 1998

Authors

Avelino, PP (Author) Other; Shellard, EPS (Author) Other; Wu, JHP (Author) Other; Allen, B (Author) Other

Journal

Title: Astrophysical Journal

Vol. 507

Pages: L101-L104

ISSN: 0004-637X

Publisher: American Astronomical Society

Indexing

ISI Web of Knowledge - 41 Citations

Scopus - 37 Citations

Other information

Authenticus ID: P-001-6RM

DOI: 10.1086/311686

Abstract (EN): We investigate the non-Gaussian properties of cosmic string-seeded linear density perturbations with cold and hot dark matter backgrounds using high-resolution numerical simulations. We compute the one-point probability density function of the resulting density field and its skewness, kurtosis, and genus curves for different smoothing scales. A semianalytic model is then invoked to provide a physical interpretation of our results. We conclude that on scales smaller than 1.5(Ohm h(2))(-1) Mpc, perturbations seeded by cosmic strings are very non-Gaussian. These scales may still be in a linear or mildly nonlinear regime in an open or Lambda universe with Gamma = Ohm h less than or similar to 0.2.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4