Method to extract the primary cosmic ray spectrum from very high energy gamma-ray data and its application to SNR RX J1713.7-3946

Abstract

Supernova remnants are likely to be the accelerators of the galactic cosmic rays. Assuming the correctness of this hypothesis, we develop a method to extract the parent cosmic ray spectrum from the VHE gamma ray flux emitted by supernova remnants (and other gamma transparent sources). Namely, we calculate semi-analytically the (inverse) operator which relates an arbitrary gamma ray flux to the parent cosmic ray spectrum, without relying on any theoretical assumption about the shape of the cosmic ray and/or photon spectrum. We illustrate the use of this technique by applying it to the young SNR RX J1713.7-3946 which has been observed by H.E.S.S. experiment during the last three years. Specific implementations of the method permit to use as an input either the parameterized VHE gamma ray flux or directly the raw data. The possibility to detect features in the cosmic rays spectrum and the error in the determination of the parent cosmic ray spectrum are also discussed.

20 pages, 6 figures, version accepted for publication in Phys.ReV.D

References in corpus (9)

• Primary particle acceleration above 100 TeV in the shell-type Supernova Remnant RX J1713.7-3946 with deep H.E.S.S. observations
• H.E.S.S. observations of the supernova remnant RX J0852.0-4622: shell-type morphology and spectrum of a widely extended VHE gamma-ray source
• Non linear particle acceleration at non-relativistic shock waves in the presence of self-generated turbulence
• Theory of cosmic ray production in the supernova remnant RX J1713.7-3946
• Guaranteed and Prospective Galactic TeV Neutrino Sources
• In which shell-type SNRs should we look for gamma-rays and neutrinos from p-p collisions?
• Neutrinos from galactic sources of cosmic rays with known gamma-ray spectra
• Perspectives of High Energy Neutrino Astronomy
• A two-zone model for the emission from RX J1713.7-3946

Cited by in corpus (3)

• Study of Nonthermal Emission from SNR RX J1713.7-3946 with Suzaku
• How precisely neutrino emission from supernova remnants can be constrained by gamma ray observations?
• On the Detectability of High-Energy Galactic Neutrino Sources