Repozytorium Uniwersytetu Jagiellońskiego

Determination of intrinsic slope of the luminosity-time correlation in x-ray afterglows of GRBs and its implications

Determination of intrinsic slope of the luminosity-time ...

Metadane (Dublin Core) Dainotti, Maria [SAP11020073] pl Vahe', Petrosian pl Ostrowski, Michał [SAP11009779] pl
dc.contributor.editor Jantzen, Robert T. pl
dc.contributor.editor Rosquist, Kjell pl
dc.contributor.editor Ruffini, Remo pl 2015-07-18T07:24:26Z 2015-07-18T07:24:26Z 2015 pl
dc.identifier.isbn 978-981-4612-14-2 (set) pl
dc.identifier.isbn 978-981-4612-18-0 (v. 1) pl
dc.identifier.isbn 978-981-4612-19-7 (v. 2) pl
dc.identifier.isbn 978-981-4612-20-3 (v. 3) pl
dc.language eng pl
dc.title Determination of intrinsic slope of the luminosity-time correlation in x-ray afterglows of GRBs and its implications pl
dc.type BookSection pl
dc.pubinfo New Jersey pl
dc.pubinfo London pl
dc.pubinfo Singapore pl
dc.pubinfo Beijing pl
dc.pubinfo Shanghai pl
dc.pubinfo Hong Kong pl
dc.pubinfo Taipei pl
dc.pubinfo Chennai : World Scientific pl
dc.description.physical 2106-2109 pl
dc.abstract.en Gamma-ray bursts (GRBs), which have been observed up to redshifts z \approx 9.5 can be good probes of the early universe and have the potential of testing cosmological models. The analysis by Dainotti of GRB Swift afterglow lightcurves with known redshifts and definite X-ray plateau shows an anti-correlation between the rest frame time when the plateau ends (the plateau end time) and the calculated luminosity at that time (or approximately an anti-correlation between plateau duration and luminosity). We present here an update of this correlation with a larger data sample of 101 GRBs with good lightcurves. Since some of this correlation could result from the redshift dependences of these intrinsic parameters, namely their cosmological evolution we use the Efron-Petrosian method to reveal the intrinsic nature of this correlation. We find that a substantial part of the correlation is intrinsic and describe how we recover it and how this can be used to constrain physical models of the plateau emission, whose origin is still unknown. The present result could help clarifing the debated issue about the nature of the plateau emission. This result is very important also for cosmological implications, because in literature so far GRB correlations are not corrected for redshift evolution and selection biases. Therefore we are not aware of their intrinsic slopes and consequently how far the use of the observed correlations can influence the derived ‘best’ cosmological settings. Therefore, we conclude that any approach that involves cosmology should take into consideration only intrinsic correlations not the observed ones. pl
dc.subject.en cosmological parameters pl
dc.subject.en gamma-rays bursts pl
dc.subject.en general pl
dc.subject.en models pl
dc.description.publication 0,3 pl
dc.description.conftype international pl
dc.identifier.doi 10.1142/9789814623995_0369 pl
dc.identifier.eisbn 978-981-4630-00-9 pl
dc.title.container The thirteenth Marcel Grossmann meeting : on recent developments in theoretical and experimental general relativity, astrophysics, and relativistic field theories : proceedings of the MG13 Meeting on General Relativity Stockholm University, Stockholm, Sweden, 1-7 July 2012 pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne pl
dc.subtype ConferenceProceedings pl
dc.conference Thirteenth Marcel Grossmann Meeting on General Relativity; 2012-07-01; 2012-07-07; Sztokholm; Szwecja; ; ; ; pl
dc.rights.original bez licencji pl

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