Particle acceleration to PeV energies in Pulsar Wind Nebula: a two zone model

Abstract

\textit{PeVatrons} are the extreme galactic accelerators capable of producing PeV particles. Recent observation of Large High Altitude Air Shower Observatory have detected UHE photons ($\ge$ 100 TeV) from 43 galactic sources. Detection of UHE photons demands the presence of at least PeV particles in the acceleration site. Although the exact nature of most of the sources are still unknown, a large fraction of these sources have spatial association with pulsar wind nebula. In this work we investigate the acceleration mechanism in pulsar wind nebula by following a magnetohydrodynamics approach. Current study relates the MHD flow solution in immediate downstream with the particle spectrum and spectral energy distribution of photons. Our study shows that MHD description in the PWN environment reduces the parameter space and most of the parameters can be constrained in terms of a single parameter, \textit{the magnetization parameter} $\sigma$ only. Considering the effect of $\sigma$, we show that in low $\sigma$ environment pulsar wind nebula can produce PeV particles. We have also investigate the role of turbulence in the nebular region in acceleration of particle to PeV energy. Current study shows that both low $\sigma$ environment and turbulence environment is favorable for acceleration of particles up to PeV energy. We have also tested our model in two different LHAASO detected PeVatron 1LHAASO J1848-000u and 1LHAASO J1929+1846u.

References in corpus (45)

• The ATNF Pulsar Catalogue
• The Evolution and Structure of Pulsar Wind Nebulae
• KASCADE measurements of energy spectra for elemental groups of cosmic rays: Results and open problems
• On the knee in the energy spectrum of cosmic rays
• The H.E.S.S. Galactic plane survey
• Young core collapse supernova remnants and their supernovae
• The First LHAASO Catalog of Gamma-Ray Sources
• Relativistic Shocks: Particle Acceleration and Magnetization
• 3HWC: The Third HAWC Catalog of Very-High-Energy Gamma-ray Sources
• The origin of Galactic cosmic rays: challenges to the standard paradigm
• A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant
• Cosmic-ray energy spectrum and composition up to the ankle - the case for a second Galactic component
• Chandra Observation of SNR G54.1+0.3 -- a Close Cousin of the Crab Nebula
• Time-Dependent Stochastic Particle Acceleration in Astrophysical Plasmas: Exact Solutions Including Momentum-Dependent Escape
• Non-thermal emission from relativistic MHD simulations of PWNe: from synchrotron to inverse Compton
• Magnetic Rayleigh-Taylor instability for Pulsar Wind Nebulae in expanding Supernova Remnants
• Discovery of a 136 millisecond radio and X-ray pulsar in SNR G54.1+0.3
• The low rate of Galactic pevatrons
• The Hunt for Pevatrons: The Case of Supernova Remnants
• A global view on star formation: The GLOSTAR Galactic Plane Survey. I. Overview and first results for the Galactic longitude range 28° < l < 36°
• Exploring particle escape in supernova remnants through gamma rays
• Spherically symmetric relativistic MHD simulations of pulsar wind nebulae in supernova remnants
• Extragalactic UHE proton spectrum and prediction for iron-nuclei flux at 10^8 - 10^9 GeV
• Supernova remnants in clumpy media: particle propagation and gamma-ray emission
• The supernova remnant W44: a case of cosmic-Ray reacceleration
• Particle acceleration by supernova shocks and spallogenic nucleosynthesis of light elements
• Inferring Initial Spin Periods for Neutron Stars in Composite Remnant
• Discovery of an Energetic 38.5 ms Pulsar Powering the Gamma-ray Source IGR J18490-0000/HESS J1849-000
• The effects of spin-down on the structure and evolution of pulsar wind nebulae
• VERITAS and Fermi-LAT observations of new HAWC sources
• On the spectral shape of radiation due to Inverse Compton Scattering close to the maximum cut-off
• Ultra-high energy Inverse Compton emission from Galactic electron accelerators
• A pulsar wind nebula origin of the LHAASO-detected UHE gamma-ray sources
• The Radio Emission, X-ray Emission, and Hydrodynamics of G328.4+0.2: A Comprehensive Analysis of a Luminous Pulsar Wind Nebula, its Neutron Star, and the Progenitor Supernova Explosion
• X-ray observations of supernova remnant G54.1+0.3: X-ray spectrum and the discovery of an X-ray jet
• Spectral signatures of PeVatrons
• Corrugation of relativistic magnetized shock waves
• A corrugated termination shock in pulsar wind nebulae?
• Broadband Photon Spectrum and its Radial Profile of Pulsar Wind Nebulae
• Radiative losses and cut-offs of energetic particles at relativistic shocks
• Particle acceleration at ultrarelativistic, perpendicular shock fronts
• Observation of gamma rays up to 320 TeV from the middle-aged TeV pulsar wind nebula HESS J1849$-$000
• A 3D Diffusive and Advective Model of Electron Transport Applied to the Pulsar Wind Nebula HESS J1825-137
• The cosmic-ray spectrum in the PeV to EeV energy range
• Chandra X-ray Observations of PSR J1849-0001, its Pulsar Wind Nebula, and the TeV Source HESS J1849-000