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Article: Pulsed and unpulsed gamma-ray emission from millisecond pulsars

TitlePulsed and unpulsed gamma-ray emission from millisecond pulsars
Authors
KeywordsGamma rays: theory
Pulsars: general
Radiation mechanisms: nonthermal
Issue Date1996
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 1996, v. 468 n. 1 PART I, p. 207-213 How to Cite?
AbstractWe use the outer gap model to study the gamma-ray emission and pair production processes of millisecond pulsars. The small light cylinder of millisecond pulsars results in a large optical depth for gamma rays produced inside the light cylinder. Electron/position cascade will take place until the energy of emitted gamma rays is less than a specific threshold energy (E crit). The model for the pulsed gamma-ray spectrum is F1(Eγ) ∼ Eγ -2 for Eγ ≤ E crit. Furthermore, electrons/positrons accelerated in the outer gap can continue to interact with the low-energy gamma rays beyond the light cylinder to produce very high energy gamma rays. The subsequent pair production and radiation processes can produce unpulsed high-energy photons in the energy range of the EGRET detector on board the Compton Gamma Ray Observatory with a model spectrum F 2(Eγ) ∼ Eγ∼ -3/2 for most millisecond pulsars. We have calculated the theoretical spectra of PSR J0751 + 18, PSR 1821-24, and PSR 1937+21 to illustrate our model. Unpulsed gamma-ray emission from other sources, e.g., 47 Tuc, are discussed also. © 1996. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/43178
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWei, DMen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorLu, Ten_HK
dc.date.accessioned2007-03-23T04:40:47Z-
dc.date.available2007-03-23T04:40:47Z-
dc.date.issued1996en_HK
dc.identifier.citationAstrophysical Journal Letters, 1996, v. 468 n. 1 PART I, p. 207-213en_HK
dc.identifier.issn2041-8205en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43178-
dc.description.abstractWe use the outer gap model to study the gamma-ray emission and pair production processes of millisecond pulsars. The small light cylinder of millisecond pulsars results in a large optical depth for gamma rays produced inside the light cylinder. Electron/position cascade will take place until the energy of emitted gamma rays is less than a specific threshold energy (E crit). The model for the pulsed gamma-ray spectrum is F1(Eγ) ∼ Eγ -2 for Eγ ≤ E crit. Furthermore, electrons/positrons accelerated in the outer gap can continue to interact with the low-energy gamma rays beyond the light cylinder to produce very high energy gamma rays. The subsequent pair production and radiation processes can produce unpulsed high-energy photons in the energy range of the EGRET detector on board the Compton Gamma Ray Observatory with a model spectrum F 2(Eγ) ∼ Eγ∼ -3/2 for most millisecond pulsars. We have calculated the theoretical spectra of PSR J0751 + 18, PSR 1821-24, and PSR 1937+21 to illustrate our model. Unpulsed gamma-ray emission from other sources, e.g., 47 Tuc, are discussed also. © 1996. The American Astronomical Society. All rights reserved.en_HK
dc.format.extent1191002 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.subjectRadiation mechanisms: nonthermalen_HK
dc.titlePulsed and unpulsed gamma-ray emission from millisecond pulsarsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-637X&volume=468&spage=207&epage=213&date=1996&atitle=Pulsed+and+Unpulsed+Gamma-Ray+Emission+from+Millisecond+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.doi10.1086/177683en_HK
dc.identifier.scopuseid_2-s2.0-21444441780en_HK
dc.identifier.hkuros21110-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-21444441780&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume468en_HK
dc.identifier.issue1 PART Ien_HK
dc.identifier.spage207en_HK
dc.identifier.epage213en_HK
dc.identifier.isiWOS:A1996VE59200019-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridWei, DM=7202908906en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridLu, T=7402684810en_HK

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