Non-Gaussian features of linear cosmic string models

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Avelino, PP (Autor) Outra; Shellard, EPS (Autor) Outra; Wu, JHP (Autor) Outra; Allen, B (Autor) Outra

Revista

Título: Astrophysical Journal

Vol. 507

Páginas: L101-L104

ISSN: 0004-637X

Editora: American Astronomical Society

Indexação

ISI Web of Knowledge - 41 Citações

Scopus - 37 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4