Cosmological transition epoch from gamma-ray burst correlations
Alfano A.C. Capozziello S. Luongo O. Muccino M.
June 2024Elsevier B.V.
Journal of High Energy Astrophysics
2024#42178 - 196 pp.
The redshift zt and the jerk parameter jt of the transition epoch are constrained by using two model-independent approaches involving the direct expansion of the Hubble rate and the expansion of the deceleration parameter around z=zt. To extend our analysis to high-redshifts, we employ the Amati, Combo, Yonetoku and Dainotti gamma-ray burst correlations. The circularity problem is prevented by calibrating these correlations through the Bézier interpolation of the updated observational Hubble data. Each gamma-ray burst data set is jointly fit with type Ia supernovae and baryonic acoustic oscillations through a Monte Carlo analysis, based on the Metropolis-Hastings algorithm, to obtain zt, jt and the correlation parameters. The overall results are compatible with the concordance model with some exceptions. We also focus on the behaviors of the dark energy, verifying its compatibility with a cosmological constant, and the matter density Ωm and compare them with the expectations of the concordance paradigm.
Cosmic acceleration , Cosmography , Gamma-ray bursts , Transition time
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Scuola Superiore Meridionale, Largo S. Marcellino 10, Napoli, 80138, Italy
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Napoli Complesso Universitario Monte S. Angelo, Via Cinthia 9 Edificio G, Napoli, 80126, Italy
Dipartimento di Fisica E. Pancini, Università di Napoli “Federico II”, Complesso Universitario Monte S. Angelo, Via Cinthia 9 Edificio G, Napoli, 80126, Italy
Università di Camerino, Divisione di Fisica, Via Madonna delle carceri 9, Camerino, 62032, Italy
SUNY Polytechnic Institute, Utica, 13502, NY, United States
INFN, Sezione di Perugia, Perugia, 06123, Italy
INAF - Osservatorio Astronomico di Brera, Milano, Italy
Al-Farabi Kazakh National University, Al-Farabi av. 71, Almaty, 050040, Kazakhstan
ICRANet, P.zza della Repubblica 10, Pescara, 65122, Italy
Scuola Superiore Meridionale
Istituto Nazionale di Fisica Nucleare (INFN)
Dipartimento di Fisica E. Pancini
Università di Camerino
SUNY Polytechnic Institute
INFN
INAF - Osservatorio Astronomico di Brera
Al-Farabi Kazakh National University
ICRANet
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