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Article: Polarization of high-energy emission from the crab pulsar

TitlePolarization of high-energy emission from the crab pulsar
Authors
KeywordsPolarization
Pulsars: Individual (Psr B0531+21)
Radiation Mechanisms: Nonthermal
Issue Date2007
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2007, v. 656 n. 2 I, p. 1044-1055 How to Cite?
AbstractWe investigate the polarization of the high-energy emission from the Crab pulsar within the framework of the outer gap accelerator, following previous studies by Cheng and coworkers. A recent version of the outer gap, in which the gap extends from inside the null charge surface to the light cylinder, is used to examine the synchrotron radiation from the secondary and tertiary pairs that are produced outside the gap. We are able to simultaneously reproduce the light curve, the spectrum, and the polarization characteristics by taking into account the gyration of the particles. The polarization position angle curve and the degree of polarization are calculated and compared with the Crab optical data. We demonstrate that the radiation from inside the null charge surface produces the outer wing and off-pulse portions of the light curve and that the tertiary pairs contribute to the bridge emission. The emission from the secondary pairs explains the main features of the observed light curve and spectrum. On the other hand, the emissions both from inside the null charge surface and from the tertiary pairs are required in order to explain the optical polarization behavior of the Crab pulsar. The energy dependence of the polarization features is predicted by the model. The polarization position angle curve indicates that our viewing angle as measured from the pulsar's rotational axis is greater than 90°. © 2007. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/175058
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTakata, Jen_US
dc.contributor.authorChang, HKen_US
dc.contributor.authorCheng, KSen_US
dc.date.accessioned2012-11-26T08:49:01Z-
dc.date.available2012-11-26T08:49:01Z-
dc.date.issued2007en_US
dc.identifier.citationAstrophysical Journal Letters, 2007, v. 656 n. 2 I, p. 1044-1055en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/175058-
dc.description.abstractWe investigate the polarization of the high-energy emission from the Crab pulsar within the framework of the outer gap accelerator, following previous studies by Cheng and coworkers. A recent version of the outer gap, in which the gap extends from inside the null charge surface to the light cylinder, is used to examine the synchrotron radiation from the secondary and tertiary pairs that are produced outside the gap. We are able to simultaneously reproduce the light curve, the spectrum, and the polarization characteristics by taking into account the gyration of the particles. The polarization position angle curve and the degree of polarization are calculated and compared with the Crab optical data. We demonstrate that the radiation from inside the null charge surface produces the outer wing and off-pulse portions of the light curve and that the tertiary pairs contribute to the bridge emission. The emission from the secondary pairs explains the main features of the observed light curve and spectrum. On the other hand, the emissions both from inside the null charge surface and from the tertiary pairs are required in order to explain the optical polarization behavior of the Crab pulsar. The energy dependence of the polarization features is predicted by the model. The polarization position angle curve indicates that our viewing angle as measured from the pulsar's rotational axis is greater than 90°. © 2007. The American Astronomical Society. All rights reserved.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_US
dc.relation.ispartofAstrophysical Journal Lettersen_US
dc.subjectPolarizationen_US
dc.subjectPulsars: Individual (Psr B0531+21)en_US
dc.subjectRadiation Mechanisms: Nonthermalen_US
dc.titlePolarization of high-energy emission from the crab pulsaren_US
dc.typeArticleen_US
dc.identifier.emailTakata, J: takata@hku.hken_US
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_US
dc.identifier.authorityTakata, J=rp00786en_US
dc.identifier.authorityCheng, KS=rp00675en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1086/510190en_US
dc.identifier.scopuseid_2-s2.0-33847722558en_US
dc.identifier.hkuros126220-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33847722558&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume656en_US
dc.identifier.issue2 Ien_US
dc.identifier.spage1044en_US
dc.identifier.epage1055en_US
dc.identifier.isiWOS:000244336900038-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridTakata, J=22735157300en_US
dc.identifier.scopusauthoridChang, HK=7407523188en_US
dc.identifier.scopusauthoridCheng, KS=9745798500en_US

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