Samushia 2009 用伽玛暴限制暗能量

主要内容:
也是弄个不依赖于宇宙学参数的距离, 然后拟合参数.

但是伽玛暴比较远, 对应于宇宙早期, 那时候暗能量不重要, 不是对限制限制暗物质更有效些么?

精彩摘抄:


文章信息:

· Find Similar Abstracts (with default settings below)

· arXiv e-print (arXiv:0905.3836)

· References in the Article

·

· Translate This Page

Title:		Constraining dark energy with gamma-ray bursts
Authors:		Samushia, Lado; Ratra, Bharat
Publication:		eprint arXiv:0905.3836
Publication Date:		05/2009
Origin:		ARXIV
Keywords:		Astrophysics - Cosmology and Extragalactic Astrophysics
Comment:		24 pages, 7 figures
Bibliographic Code:		2009arXiv0905.3836S

Abstract

We use the cosmology-independent gamma-ray burst (GRB) distances of Y. Wang (2008) to constrain dark energy cosmological model parameters. Current GRB data alone can not tightly constrain cosmological parameters and allow for a wide range of dark energy models. When used jointly with current Type Ia supernovae data and baryon acoustic peak measurements, the GRB data favor slightly lower values of nonrelativistic matter energy density. We show that with a future factor of 2 reduction in the GRB distance errors, GRBs can give very tight constraints on cosmological parameters.

---

Bibtex entry for this abstract Preferred format for this abstract (see Preferences)