Abstract Details
| Name: Gunindra Krishna Mahanta Affiliation: Bhabha Atomic Research Centre Conference ID: ASI2025_46 Title : Modeling Particle Acceleration in Pulsar Wind Nebulae as a cosmic PeVatron: A Two-Zone Approach Authors and Co-Authors : Gunindra Krishna Mahanta 1,2, Bitan Ghosal1,2, Nilay Bhatt 1, Subir Bhattacharyya 1,2 Abstract Type : Poster Abstract Category : High Energy Phenomena, Fundamental Physics and Astronomy Abstract : PeVatrons are the extreme galactic accelerators capable of accelerating particles up to PeV energies. The exact nature of PeVatrons remains uncertain, but the potential PeVatron candidates include supernova remnant, pulsar wind nebulae, gamma-ray bubble, microquasars and star clusters. While the Crab Nebula being the first PeVatron detected by LHAASO, LHAASO also detected nearly 40 sources at > 100 TeV energies. In this study, we develop a two-zone model to explain acceleration of particles up to PeV energies and emission of radiation from pulsar wind nebula. The model considers the acceleration of particles at the termination shock of PWN and the particles are further accelerated by second order Fermi acceleration in the nebula. Particles emit radiation through the synchrotron and inverse Compton processes in the nebula. This work provides constrains the parameters and conditions necessary for particle acceleration in PWNe to PeV levels. |