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Article: High-energy radiation from rapidly spinning pulsars with thick outer gaps

TitleHigh-energy radiation from rapidly spinning pulsars with thick outer gaps
Authors
KeywordsMHD
Pulsars: general
Radiation mechanisms: nonthermal
Stars: magnetic fields
Issue Date1997
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 1997, v. 487 n. 1 PART I, p. 370-379 How to Cite?
AbstractWe propose a self-consistent mechanism to estimate the size of the acceleration region in the outer magnetosphere of pulsars (outer gap) and calculate the high-energy radiation produced by the synchrocurvature mechanism from the outer gap. We find that a power-law energy distribution of the accelerated particles can be obtained if the outer gap is thick enough that E · B̂ inside the gap can be approximately proportional to (Ω.r/c)1/2B(r). We apply our model to explain X-rays and γ-rays from Geminga and PSR B1055-52, whose outer gaps may occupy ∼70% of the outer magnetosphere region. If the radius of curvature near the light cylinder of the medium outer gap is larger than the dipolar structure, then perhaps this model may also apply to PSR B1951 + 32, PSR B1706-44, and others. © 1997. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/43206
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, Len_HK
dc.contributor.authorCheng, KSen_HK
dc.date.accessioned2007-03-23T04:41:17Z-
dc.date.available2007-03-23T04:41:17Z-
dc.date.issued1997en_HK
dc.identifier.citationAstrophysical Journal Letters, 1997, v. 487 n. 1 PART I, p. 370-379en_HK
dc.identifier.issn2041-8205en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43206-
dc.description.abstractWe propose a self-consistent mechanism to estimate the size of the acceleration region in the outer magnetosphere of pulsars (outer gap) and calculate the high-energy radiation produced by the synchrocurvature mechanism from the outer gap. We find that a power-law energy distribution of the accelerated particles can be obtained if the outer gap is thick enough that E · B̂ inside the gap can be approximately proportional to (Ω.r/c)1/2B(r). We apply our model to explain X-rays and γ-rays from Geminga and PSR B1055-52, whose outer gaps may occupy ∼70% of the outer magnetosphere region. If the radius of curvature near the light cylinder of the medium outer gap is larger than the dipolar structure, then perhaps this model may also apply to PSR B1951 + 32, PSR B1706-44, and others. © 1997. The American Astronomical Society. All rights reserved.en_HK
dc.format.extent375191 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.rightsThe Astrophysical Journal. Copyright © University of Chicago Press.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectMHDen_HK
dc.subjectPulsars: generalen_HK
dc.subjectRadiation mechanisms: nonthermalen_HK
dc.subjectStars: magnetic fieldsen_HK
dc.titleHigh-energy radiation from rapidly spinning pulsars with thick outer gapsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-637X&volume=487&issue=pt 1&spage=370&epage=379&date=1997&atitle=High-Energy+Radiation+from+Rapidly+Spinning+Pulsars+with+Thick+Outer+Gapsen_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.doi10.1086/304589en_HK
dc.identifier.scopuseid_2-s2.0-21944450449en_HK
dc.identifier.hkuros28441-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-21944450449&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume487en_HK
dc.identifier.issue1 PART Ien_HK
dc.identifier.spage370en_HK
dc.identifier.epage379en_HK
dc.identifier.isiWOS:A1997XY50600033-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridZhang, L=38762428100en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK

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