Gamma-ray bursts from evaporating primordial black holes (original) (raw)
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Experimental search of bursts of very high energy gamma rays from primordial black holes
2009
The technical procedure of a search of bursts of very high energy gamma rays from evaporation of primordial black holes on air-shower array "Andyrchy" of Baksan Neutrino Observatory of Institute for Nuclear Research is described. The theoretical model used in the present work assumes that the chromosphere around the evaporating black hole does not form. For minimization of the cosmic ray background the method of multidimensional analysis of modelled as well as experimentally detected events is applied. The new upper limit on the concentration of evaporating primordial black holes in the local region of Galaxy is obtained. The comparison of the results of different experiments is given.
2009
Experimental data of arrays "Andyrchy" and "Carpet-2" of Baksan Neutrino Observatory (Institute for Nuclear Research), obtained in the regime of a detection of the single cosmic-ray component, are used for a search of the bursts of cosmic gamma rays from evaporating primordial black holes. Different theoretical models of the evaporation process are used for the analysis. Distributions of the counting rate fluctuations on both arrays agree with the expectations from the cosmic ray background. The new constraints on the concentration of evaporating primordial black holes in the local region of Galaxy are obtained. The comparison of the results of different experiments is given.
2008
Possibilities of an experimental search for gamma-ray bursts from primordial black hole (PBH) evaporations in space are reconsidered. It is argued that the corresponding constraints which can be obtained in experiments with cosmic ray detectors strongly depend on theoretical approach used for a description of the PBH evaporation process. Predictions of several theoretical models for gamma-ray spectra from final stages of PBH life (integrated over time) are given.
The Emission of Ultra-High Energy Cosmic Rays from Electromagnetic Black Holes
The Tenth …, 2005
It is by now clear that gamma-ray bursts originate from a spherically symmetric collapse of a massive star into a black hole endowed with electromagnetic structure (EMBH). Such theoretical approach has been confirmed to a very high level of accuracy in the explanation of the time variability, of the spectra and in the afterglow of GRBs. Here we consider EMBH as a source of UHECRs. It will be shown that such senario is coherent with the expected UHECRs flux, the observed events at 10 20 eV and we will developp new ...