Cardone 2010 用X射线余辉的L_X-T_a关系来定宇宙学参数

主要内容:
T_a是拐折时间，L是此时的X射线光度。

精彩摘抄:


文章信息:

· Find Similar Abstracts (with default settings below)

· arXiv e-print (arXiv:1005.0122)

· References in the Article

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		Constraining cosmological parameters by Gamma Ray Burst X - ray afterglow lightcurves
Authors:		Cardone, V. F.; Dainotti, M. G.; Capozziello, S.; Willingale, R.
Publication:		eprint arXiv:1005.0122
Publication Date:		05/2010
Origin:		ARXIV
Keywords:		Astrophysics - Cosmology and Extragalactic Astrophysics
Comment:		6 pages, 2 figures, 2 tables, submitted
Bibliographic Code:		2010arXiv1005.0122C

Abstract

We present the Hubble diagram (HD) of 66 Gamma Ray Bursts (GRBs) derived using only data from their X - ray afterglow lightcurve. To this end, we use the recently updated L_X - T_a correlation between the break time T_a and the X - ray luminosity L_X measured at T_a calibrated from a sample of Swift GRBs with lightcurves well fitted by the Willingale et al. (2007) model. We then investigate the use of this HD to constrain cosmological parameters when used alone or in combination with other data showing that the use of GRBs leads to constraints in agreement with previous results in literature. We finally argue that a larger sample of high luminosity GRBs can provide a valuable information in the search for the correct cosmological model.

---

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