Sign on

SAO/NASA ADS arXiv e-prints Abstract Service

· Find Similar Abstracts (with default settings below)
· arXiv e-print (arXiv:0911.0041)
· References in the Article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Modeling The Large Scale Bias of Neutral Hydrogen
Authors:
Marin, Felipe; Gnedin, Nickolay Y.; Seo, Hee-Jong; Vallinotto, Alberto
Publication:
eprint arXiv:0911.0041
Publication Date:
11/2009
Origin:
ARXIV
Keywords:
Astrophysics - Cosmology and Extragalactic Astrophysics
Comment:
8 pages, 6 figures. Submitted to ApJ
Bibliographic Code:
2009arXiv0911.0041M

Abstract

We present analytical estimates of the large scale bias of neutral Hydrogen (HI) based on the Halo Occupation Distribution formalism. We use a simple, non-parametric model which monotonically relates the total mass of a halo with its HI mass at zero redshift; for earlier times we assume limiting models for the HI density parameter evolution, consistent with the data presently available, as well as two main scenarios for the evolution of our HI mass - Halo mass relation. We find that both the linear and the first non-linear bias terms exhibit a remarkable evolution with redshift, regardless of the specific limiting model assumed for the HI evolution. These analytical predictions are then shown to be consistent with measurements performed on the Millennium Simulation. Additionally, we show that this strong bias evolution does not sensibly affect the measurement of the HI Power Spectrum.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints