| | |
| | |
Stat |
Members: 3645 Articles: 2'503'724 Articles rated: 2609
23 April 2024 |
|
| | | |
|
Article overview
| |
|
Excursion Set Theory for generic moving barriers and non-Gaussian initial conditions | Andrea De Simone
; Michele Maggiore
; Antonio Riotto
; | Date: |
12 Jul 2010 | Abstract: | Excursion set theory, where density perturbations evolve stochastically with
the smoothing scale, provides a method for computing the mass function of
cosmological structures like dark matter halos, sheets and filaments. The
computation of these mass functions is mapped into the so-called first-passage
time problem in the presence of a moving barrier. In this paper we use the path
integral formulation of the excursion set theory developed recently to
analytically solve the first-passage time problem in the presence of a generic
moving barrier, in particular the barrier corresponding to ellipsoidal
collapse. We perform the computation for both Gaussian and non-Gaussian initial
conditions. The expression of the halo mass function for the ellipsoidal
collapse barrier and with non-Gaussianity is therefore obtained in a fully
consistent way and it does not require the introduction of any form factor
artificially derived from the Press-Schechter formalism based on the spherical
collapse and usually adopted in the literature. | Source: | arXiv, 1007.1903 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |