Formation of the dark bays in the Crab optical synchrotron nebula - Is the Crab pulsar wind bubble interacting with its progenitor's wind?

1992 ◽  
Vol 400 ◽  
pp. 186 ◽  
Author(s):  
Zhi-Yun Li ◽  
Mitchell C. Begelman
Keyword(s):  
Crab Pulsar ◽  
Pulsar Wind ◽  
Synchrotron Nebula

scholarly journals Near‐Infrared, Kilosecond Variability of the Wisps and Jet in the Crab Pulsar Wind Nebula

2005 ◽  
Vol 633 (2) ◽  
pp. 931-940 ◽  
Author(s):  
A. Melatos ◽  
D. Scheltus ◽  
M. T. Whiting ◽  
S. S. Eikenberry ◽  
R. W. Romani ◽  
...  
Keyword(s):  
Near Infrared ◽  
Crab Pulsar ◽  
Pulsar Wind

scholarly journals The σ Problem of the Crab Pulsar Wind

2004 ◽  
Vol 218 ◽  
pp. 171-174
Author(s):  
J. G. Kirk ◽  
O. Skjæraasen
Keyword(s):  
Dissipation Rate ◽  
A Priori ◽  
Termination Shock ◽  
Crab Pulsar ◽  
Complete Conversion ◽  
Poynting Flux ◽  
Dissipation Rates ◽  
Pulsar Wind

The conversion of the Crab pulsar wind from one dominated by Poynting flux close to the star to one dominated by particle-borne energy at the termination shock is considered. The idea put forth by Coroniti (1990) and criticized by Lyubarsky & Kirk (2001) that reconnection in a striped wind is responsible, is generalized to include faster prescriptions for the a priori unknown dissipation rate. Strong acceleration of the wind is confirmed, and the higher dissipation rates imply complete conversion of Poynting flux into particle-borne flux within the unshocked wind.

scholarly journals The Crab pulsar and its pulsar-wind nebula in the optical and infrared

2009 ◽  
Vol 508 (1) ◽  
pp. 221-228 ◽  
Author(s):  
A. Tziamtzis ◽  
P. Lundqvist ◽  
A. A. Djupvik
Keyword(s):  
Crab Pulsar ◽  
Pulsar Wind

Magnetohydrodynamic Acceleration of the Crab Pulsar Wind

2002 ◽  
Vol 573 (1) ◽  
pp. L31-L34 ◽  
Author(s):  
I. Okamoto
Keyword(s):  
Crab Pulsar ◽  
Pulsar Wind

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

2022 ◽  
Vol 924 (2) ◽  
pp. 42
Author(s):  
Lin Nie ◽  
Yang Liu ◽  
Zejun Jiang ◽  
Xiongfei Geng
Keyword(s):  
Gamma Ray ◽  
Crab Nebula ◽  
High Energy ◽  
Model Parameters ◽  
Wave Band ◽  
Crab Pulsar ◽  
High Energy Gamma ◽  
Energy Gamma ◽  
Pulsar Wind ◽  
The Crab Nebula

Abstract 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.

scholarly journals Faint X‐Ray Structure in the Crab Pulsar Wind Nebula

2006 ◽  
Vol 652 (2) ◽  
pp. 1277-1287 ◽  
Author(s):  
F. D. Seward ◽  
W. H. Tucker ◽  
R. A. Fesen
Keyword(s):  
Crab Pulsar ◽  
X Ray ◽  
Pulsar Wind

scholarly journals Precision Pulsar Timing in the Presence of Interstellar Weather – PSR B1937+21 and the Crab Pulsar

1996 ◽  
Vol 160 ◽  
pp. 87-90 ◽  
Author(s):  
D. C. Backer ◽  
T. Wong
Keyword(s):  
Structure Function ◽  
Column Density ◽  
Density Fluctuations ◽  
Crab Pulsar ◽  
Dual Frequency ◽  
Frequency Dependent ◽  
Pulsar Timing ◽  
Multipath Scattering ◽  
Density Of Electrons ◽  
Synchrotron Nebula

AbstractWe report on six months of dual-frequency, precision timing of PSR B1937+21 and the Crab pulsar. Variations in the column density of electrons – interstellar weather – are studied. The column is not unique in the presence of frequency-dependent multipath scattering, and this may explain the non-square law dependence of systematic timing residuals on B1937+21. The electron column density variations of the Crab pulsar are summarized in a structure function that ranges from 1012cm to 1015cm. These density fluctuations are located in the thermal shell surrounding the synchrotron nebula.

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