Ultra-high-energy Gamma-Ray Radiation from the Crab Pulsar Wind Nebula

It has been long debated whether the high-energy gamma-ray radiation from the Crab Nebula stems from leptonic or hadronic processes. In this work, we investigate the multiband nonthermal radiation from the Crab pulsar wind nebula with the leptonic and leptonic–hadronic hybrid models, respectively. T...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2022-01, Vol.924 (2), p.42
Main Authors: Nie, Lin, Liu, Yang, Jiang, Zejun, Geng, Xiongfei
Format: Article
Language:English
Subjects:
Astrophysics
Crab nebula
Energy
Gamma emission
Gamma rays
Leptons
Markov chains
Mathematical models
Modelling
Monte Carlo simulation
Nebulae
Nonthermal radiation
Parameters
Protons
Pulsar winds
Pulsars
Radiation
Radiative processes
Rotation powered pulsars
Sampling
Stellar winds
Wind
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It has been long debated whether the high-energy gamma-ray radiation from the Crab Nebula stems from leptonic or hadronic processes. In this work, we investigate the multiband nonthermal radiation from the Crab pulsar wind nebula with the leptonic and leptonic–hadronic hybrid models, respectively. Then we use the Markov Chain Monte Carlo sampling technology and method of sampling trace to study the stability and reasonability of the model parameters according to the recently observed results and obtain the best-fitting values of parameters. Finally, we calculate different radiative components generated by the electrons and protons in the Crab Nebula. The modeling results indicate that the pure leptonic origin model with the one-zone only can partly agree with some segments of the data from various experiments (including the PeV gamma-ray emission reported by the LHAASO and the other radiation ranging from the radio to very-high-energy gamma-ray wave band), and the contribution of hadronic interaction is hardly constrained. However, we find that the hadronic process may also contribute, especially in the energy range exceeding the PeV. In addition, it can be inferred that the higher energy signals from the Crab Nebula could be observed in the future.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ac348d