منابع مشابه
The Luminosity and Angular Distributions of Long-Duration GRBs
The realization that the total energy of GRBs is correlated to their jet break angles motivates the search for a similar relation between the peak luminosity, L, and the jet break angles, L ∝ θ. Such a relation implies that the GRB luminosity function determines the angular distribution. We re-derive the GRB luminosity function using the BATSE peak flux distribution and compare the predicted di...
متن کاملThe Luminosity and Angular Distributions of Long GRBs
The realization that the total energy of GRBs is related to their jet break angles suggests a similar relation between the peak luminosity, L, and the jet break angles, L ∝ θ. Such a relation implies that the GRB luminosity function determines the angular distribution. We re-derive the GRB luminosity function using the BATSE peak flux distribution and compare the predicted distribution with the...
متن کاملAngular correlations of galaxy distribution
We study the angular correlations of various galaxy catalogs (CfA1, SSRS1, Perseus-Pisces, APM Bright Galaxies and Zwicky). We find that the angular correlation exponent is γ a = 0.1 ± 0.1 rather than γ a = 0.7 as usually found by the standard correlation function ω(θ). We identify the problem in the artificial decay of ω(θ). Moreover we find that no characteristic angular scale is present in a...
متن کاملProbing the dark ages with redshift distribution of GRBs
In this article, we explore the possibility of using the properties of gamma ray bursts (GRBs) to probe the physical conditions in the epochs prior to reionization. The redshift distribution of GRBs is modelled using the Press-Schechter formalism with an assumption that they follow the cosmic star formation history. We reproduce the observed star formation rate obtained from galaxies in the red...
متن کاملThe Distribution of Energy in Long Duration Grbs
The energy release in gamma-ray bursts is one of the most interesting clues on the nature of their “inner engines”. We show here that the total energy release in GRBs varies by less than one order of magnitude from one burst to another while the energy emitted in γ-ray photons varies by more than an order of magnitude. This result indicates that the central engine of long duration GRB has a rem...
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ژورنال
عنوان ژورنال: Acta Polytechnica
سال: 2012
ISSN: 1805-2363,1210-2709
DOI: 10.14311/1520