Dark energy constraints using gamma-ray burst correlations with DESI 2024 data
Alfano A.C. Luongo O. Muccino M.
April 2025Elsevier B.V.
Journal of High Energy Astrophysics
2025#46
Even though the Dark Energy Spectroscopic Instrument (DESI) mission does not exclude a dynamical dark energy evolution, the concordance paradigm, i.e., the ΛCDM model, remains statistically favored, as it depends on the fewest number of free parameters. In this respect, high redshift astrophysical sources, such as gamma-ray bursts, represent a formidable tool to model the form of dark energy, since they may provide a link between early and local redshift regimes. Hence, the use of these objects as possible distance indicators turns out to be essential to investigate the cosmological puzzle. To this end, we adopt two gamma-ray burst linear correlations, namely the Lp−Ep and L0−Ep−T relations, to test the flat and non-flat ΛCDM, ω0CDM, and ω0ω1CDM cosmological models, i.e., those directly examined by the DESI collaboration. The inferred correlation coefficients and cosmological parameters are thus obtained by considering two independent Monte Carlo Markov chain analyses, the first considering the whole DESI data set and the second excluding a seemingly problematic data point placed at zeff=0.51. Using model selection criteria, the two above correlations do not show a preference on a precise cosmological model although, when the data point at zeff is included, the concordance paradigm appears to be the least favored among the tested cosmological models.
Cosmology , Dark energy , Gamma-ray bursts , Model-independent techniques
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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
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)
Università di Camerino
SUNY Polytechnic Institute
INFN
INAF - Osservatorio Astronomico di Brera
Al-Farabi Kazakh National University
ICRANet
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