Extensive air showers generated by gamma-quanta from Geminga and Tycho's SNR at energy range 1–30 TeV

Abstract

The gamma-quantum emitting objects in our Galaxy are supernova remnants and binary. The observed results of gamma-quantum sources Tycho Brahe and Geminga by the SHALON gamma-telescope are presented. The integral spectra of events from the source - k o n and background events, observing simultaneously with source's events - k o f f , and the source image are presented. The energy spectra of Tycho's SNR and Geminga supernova remnant F ( E 0 > 0.8 T e V ) ∼ E k are harder than the Crab Nebula spectrum. Tycho's SNR has long been considered as a candidate cosmic ray source in Northern Hemisphere. A non-linear kinetic model of cosmic ray acceleration in supernova remnants was used for Tycho's SNR. The expected π°-decay gamma-quanta flux F γ ∼ E γ −1 extends up to ∼30TeV, whereas the Inverse Compton gamma-ray flux has a cut-off above a few TeV. So, the detection of gamma-rays at energies of ∼ 10 − 30 T e V by SHALON is evidence for hadron origin.