Amati, L. 2009 伽玛暴与宇宙学

主要内容:
宇宙学参数+宇宙学环境
小综述

精彩摘抄:


文章信息:

· Find Similar Abstracts (with default settings below)

· arXiv e-print (arXiv:0908.1339)

· References in the Article

·

· Translate This Page

Title:		Cosmology with Gamma-Ray Bursts
Authors:		Amati, L.
Publication:		eprint arXiv:0908.1339
Publication Date:		08/2009
Origin:		ARXIV
Keywords:		Astrophysics - Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Comment:		8 pages, 6 figures, to be published in the proceedings of "44th Rencontres de Moriond", La Thuile (Val d'Aosta, Italy) on "Very High Energy Phenomena in the Universe"
Bibliographic Code:		2009arXiv0908.1339A

Abstract

Gamma-Ray Bursts (GRBs) are the brightest sources in the universe, emit mostly in the hard X-ray energy band and have been detected at redshifts up to ~8.1. Thus, they are in principle very powerful probes for cosmology. I shortly review the researches aimed to use GRBs for the measurement of cosmological parameters, which are mainly based on the correlation between spectral peak photon energy and total radiated energy or luminosity. In particular, based on an enriched sample of 95 GRBs, I will provide an update of the analysis by Amati et al. (2008) aimed at extracting information on Omega_M and, to a less extent, on Omega_Lambda, from the Ep,i - Eiso correlation. I also briefly discuss the perspectives of using GRBs as cosmological beacons for high resolution absorption spectroscopy of the IGM (e.g., WHIM), and as tracers of the SFR, up to the "dark ages" (z > 6) of the universe.

---

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