Constraining cosmological parameters by gamma-ray burst X-ray afterglow light curves

被引：63

作者：

Cardone, V. F. ^{[1
,2
]}

Dainotti, M. G. ^{[3
]}

Capozziello, S. ^{[2
,4
]}

Willingale, R. ^{[5
]}

机构：

[1] Univ Molise, Dipartimento Sci & Tecnol Ambiente & Terr, I-86090 Pesche, IS, Italy

[2] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy

[3] Uniwersytet Jagiellonski, Obserwatorium Astron, PL-31501 Krakow, Poland

[4] Complesso Univ Monte SantAngelo, INFN Sez Napoli, I-80126 Naples, Italy

[5] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2010年 / 408卷 / 02期

关键词：

cosmological parameters; gamma-rays: bursts: general; DARK ENERGY; HUBBLE DIAGRAM; LUMINOSITY; CONSTANT; REDSHIFT; MODEL; PEAK; SPECTRUM; GRAVITY; SAMPLE;

D O I：

10.1111/j.1365-2966.2010.17197.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the Hubble diagram (HD) of 66 gamma-ray bursts (GRBs) derived using only data from their X-ray afterglow light curve. 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 light curves well fitted by the Willingale et al. 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.

引用

页码：1181 / 1186

页数：6

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