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Title: GRB physics and cosmology with peak energy-intensity correlations

Gamma Ray Bursts (GRBs) are immensely energetic explosions radiating up to 10{sup 54} erg of energy isotropically (E{sub iso}) and they are observed within a wide range of redshift (from ∼ 0.01 up to ∼ 9). Such enormous power and high redshift point at these phenomena being highly favorable to investigate the history and evolution of our universe. The major obstacle in their application as cosmological study-tools is to find a way to standardize the GRBs, for instance similar to SNe Ia. With respect to this goal, the correlation between spectral peak energy (E{sub p,i}) and the “intensity” is a positively useful and investigated criterion. Moreover, it has been demonstrated that, through the E{sub p,i} – E{sub iso} correlation, the current data set of GRBs can already contribute to the independent evidence of the matter density Ω{sub M} being ∼ 0.3 for a flat universe scenario. We try to inspect and compare the correlations of E{sub p,i} with different intensity indicators (e.g., radiated energy, average and peak luminosity, bolometric vs. monochromatic quantities, etc.) both in terms of intrinsic dispersion and precise estimation of Ω{sub M}. The outcome of such studies are further analyzed in verifying the reliability of the correlationsmore » for both GRB physics and their standardization for cosmology.« less
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [3]
  1. University of Ferrara, Via Saragat-1, Block C, Ferrara 44122 (Italy)
  2. (France)
  3. (Italy)
  4. INAF - IASF Bologna, Via P. Gobetti 101, Bologna 41125 (Italy)
Publication Date:
OSTI Identifier:
22494312
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1693; Journal Issue: 1; Conference: 2. ICRANet Cesar Lattes meeting on supernovae, neutron stars and black holes, Rio de Janeiro (Brazil), 13-22 Apr 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOLOMETERS; COMPARATIVE EVALUATIONS; CORRELATIONS; COSMIC GAMMA BURSTS; COSMOLOGY; DENSITY; DISPERSIONS; INDICATORS; LUMINOSITY; MONOCHROMATIC RADIATION; PEAKS; RED SHIFT; UNIVERSE