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Article: High-energy gamma-ray emission from anomalous X-ray pulsars

TitleHigh-energy gamma-ray emission from anomalous X-ray pulsars
Authors
KeywordsGamma rays: theory
Pulsars: general
Stars: neutron
Issue Date2001
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2001, v. 562 n. 2 PART II, p. 918-924 How to Cite?
AbstractWe study the high-energy gamma-ray radiation from the outer magnetospheres of the anomalous X-ray pulsars. For pulsars with superstrong magnetic fields (B > 1014 G), the magnetic field in the region far away from the neutron star surface drops below the quantum critical value, and high-energy gammaray emission can be emitted. The electrons/positrons produced by collisions between high-energy photons from the outer gap and the soft X-rays resulting from the stellar surface are accelerated inside the outer gap and emit the high-energy gamma rays through curvature radiation. The gamma-ray spectrum and luminosity in this model can be estimated once the pulsar parameters such as period, surface magnetic field, and surface temperature are given. We apply this model to some anomalous X-ray pulsars such as 4U 0142 + 615, 1E 1048.1-5937, RX J170849-4009, 1E 1841-045, and 1E 2259 + 586 and suggest that their gamma-ray fluxes could be detected by the Gamma-Ray Large-Area Space Telescope. © 2001. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/43336
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorZhang, Len_HK
dc.date.accessioned2007-03-23T04:43:49Z-
dc.date.available2007-03-23T04:43:49Z-
dc.date.issued2001en_HK
dc.identifier.citationAstrophysical Journal Letters, 2001, v. 562 n. 2 PART II, p. 918-924en_HK
dc.identifier.issn2041-8205en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43336-
dc.description.abstractWe study the high-energy gamma-ray radiation from the outer magnetospheres of the anomalous X-ray pulsars. For pulsars with superstrong magnetic fields (B > 1014 G), the magnetic field in the region far away from the neutron star surface drops below the quantum critical value, and high-energy gammaray emission can be emitted. The electrons/positrons produced by collisions between high-energy photons from the outer gap and the soft X-rays resulting from the stellar surface are accelerated inside the outer gap and emit the high-energy gamma rays through curvature radiation. The gamma-ray spectrum and luminosity in this model can be estimated once the pulsar parameters such as period, surface magnetic field, and surface temperature are given. We apply this model to some anomalous X-ray pulsars such as 4U 0142 + 615, 1E 1048.1-5937, RX J170849-4009, 1E 1841-045, and 1E 2259 + 586 and suggest that their gamma-ray fluxes could be detected by the Gamma-Ray Large-Area Space Telescope. © 2001. The American Astronomical Society. All rights reserved.en_HK
dc.format.extent112809 bytes-
dc.format.extent12158 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_HK
dc.relation.ispartofAstrophysical Journal Lettersen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsThe Astrophysical Journal. Copyright © University of Chicago Press.en_HK
dc.subjectGamma rays: theoryen_HK
dc.subjectPulsars: generalen_HK
dc.subjectStars: neutronen_HK
dc.titleHigh-energy gamma-ray emission from anomalous X-ray pulsarsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-637X&volume=562&issue=pt 1&spage=918&epage=924&date=2001&atitle=High-Energy+Gamma-Ray+Emission+from+Anomalous+X-Ray+Pulsarsen_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1086/323857en_HK
dc.identifier.scopuseid_2-s2.0-0041482501en_HK
dc.identifier.hkuros65269-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0041482501&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume562en_HK
dc.identifier.issue2 PART IIen_HK
dc.identifier.spage918en_HK
dc.identifier.epage924en_HK
dc.identifier.isiWOS:000172572600029-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridZhang, L=38762428100en_HK

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