A re-visit of the phase-resolved X-ray and γ-ray spectra of the Crab pulsar
We use a modified outer gap model to study the multi-frequency phase-resolved spectra of the Crab pulsar. The emissions from both poles contribute to the light curve and the phase-resolved spectra. Using the synchrotron self-Compton mechanism and by considering the incomplete conversion of curvature...
Main Authors: | , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
arXiv
2007
|
Subjects: | |
Online Access: | https://dx.doi.org/10.48550/arxiv.0711.2719 https://arxiv.org/abs/0711.2719 |
id |
ftdatacite:10.48550/arxiv.0711.2719 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.48550/arxiv.0711.2719 2023-05-15T18:22:47+02:00 A re-visit of the phase-resolved X-ray and γ-ray spectra of the Crab pulsar Tang, Anisia P. S. Takata, J. Jia, J. J. Cheng, K. S. 2007 https://dx.doi.org/10.48550/arxiv.0711.2719 https://arxiv.org/abs/0711.2719 unknown arXiv https://dx.doi.org/10.1086/527029 Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ Astrophysics astro-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2007 ftdatacite https://doi.org/10.48550/arxiv.0711.2719 https://doi.org/10.1086/527029 2022-04-01T17:28:00Z We use a modified outer gap model to study the multi-frequency phase-resolved spectra of the Crab pulsar. The emissions from both poles contribute to the light curve and the phase-resolved spectra. Using the synchrotron self-Compton mechanism and by considering the incomplete conversion of curvature photons into secondary pairs, the observed phase-averaged spectrum from 100 eV - 10 GeV can be explained very well. The predicted phase-resolved spectra can match the observed data reasonably well, too. We find that the emission from the north pole mainly contributes to Leading Wing 1. The emissions in the remaining phases are mainly dominated by the south pole. The widening of the azimuthal extension of the outer gap explains Trailing Wing 2. The complicated phase-resolved spectra for the phases between the two peaks, namely Trailing Wing 1, Bridge and Leading Wing 2, strongly suggest that there are at least two well-separated emission regions with multiple emission mechanisms, i.e. synchrotron radiation, inverse Compton scattering and curvature radiation. Our best fit results indicate that there may exist some asymmetry between the south and the north poles. Our model predictions can be examined by GLAST. : 35 pages, 13 figures, accepted to publish in ApJ Text South pole DataCite Metadata Store (German National Library of Science and Technology) North Pole South Pole |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Astrophysics astro-ph FOS Physical sciences |
spellingShingle |
Astrophysics astro-ph FOS Physical sciences Tang, Anisia P. S. Takata, J. Jia, J. J. Cheng, K. S. A re-visit of the phase-resolved X-ray and γ-ray spectra of the Crab pulsar |
topic_facet |
Astrophysics astro-ph FOS Physical sciences |
description |
We use a modified outer gap model to study the multi-frequency phase-resolved spectra of the Crab pulsar. The emissions from both poles contribute to the light curve and the phase-resolved spectra. Using the synchrotron self-Compton mechanism and by considering the incomplete conversion of curvature photons into secondary pairs, the observed phase-averaged spectrum from 100 eV - 10 GeV can be explained very well. The predicted phase-resolved spectra can match the observed data reasonably well, too. We find that the emission from the north pole mainly contributes to Leading Wing 1. The emissions in the remaining phases are mainly dominated by the south pole. The widening of the azimuthal extension of the outer gap explains Trailing Wing 2. The complicated phase-resolved spectra for the phases between the two peaks, namely Trailing Wing 1, Bridge and Leading Wing 2, strongly suggest that there are at least two well-separated emission regions with multiple emission mechanisms, i.e. synchrotron radiation, inverse Compton scattering and curvature radiation. Our best fit results indicate that there may exist some asymmetry between the south and the north poles. Our model predictions can be examined by GLAST. : 35 pages, 13 figures, accepted to publish in ApJ |
format |
Text |
author |
Tang, Anisia P. S. Takata, J. Jia, J. J. Cheng, K. S. |
author_facet |
Tang, Anisia P. S. Takata, J. Jia, J. J. Cheng, K. S. |
author_sort |
Tang, Anisia P. S. |
title |
A re-visit of the phase-resolved X-ray and γ-ray spectra of the Crab pulsar |
title_short |
A re-visit of the phase-resolved X-ray and γ-ray spectra of the Crab pulsar |
title_full |
A re-visit of the phase-resolved X-ray and γ-ray spectra of the Crab pulsar |
title_fullStr |
A re-visit of the phase-resolved X-ray and γ-ray spectra of the Crab pulsar |
title_full_unstemmed |
A re-visit of the phase-resolved X-ray and γ-ray spectra of the Crab pulsar |
title_sort |
re-visit of the phase-resolved x-ray and γ-ray spectra of the crab pulsar |
publisher |
arXiv |
publishDate |
2007 |
url |
https://dx.doi.org/10.48550/arxiv.0711.2719 https://arxiv.org/abs/0711.2719 |
geographic |
North Pole South Pole |
geographic_facet |
North Pole South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1086/527029 |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.0711.2719 https://doi.org/10.1086/527029 |
_version_ |
1766202208551960576 |