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Title: Constraining cosmological parameters by gamma-ray burst X-ray afterglow light curves
Authors: Capozziello, S.
Dainotti, M. G.
Willingale, R.
Cardone, V. F.
First Published: 21-Oct-2010
Publisher: Oxford University Press (OUP)
Citation: Monthly Notices of the Royal Astronomical Society, 2010, 408 (2), pp. 1181-186
Abstract: 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 LX–Ta correlation between the break time Ta and the X-ray luminosity LX measured at Ta 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.
DOI Link: 10.1111/j.1365-2966.2010.17197.x
ISSN: 0035-8711
eISSN: 1365-2966
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2010 the authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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