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Article: High-energy radiation from rapidly spinning pulsars with thick outer gaps
Title | High-energy radiation from rapidly spinning pulsars with thick outer gaps |
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Authors | |
Keywords | MHD Pulsars: general Radiation mechanisms: nonthermal Stars: magnetic fields |
Issue Date | 1997 |
Publisher | Institute 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? |
Abstract | We 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 Identifier | http://hdl.handle.net/10722/43206 |
ISSN | 2023 Impact Factor: 8.8 2023 SCImago Journal Rankings: 2.766 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zhang, L | en_HK |
dc.contributor.author | Cheng, KS | en_HK |
dc.date.accessioned | 2007-03-23T04:41:17Z | - |
dc.date.available | 2007-03-23T04:41:17Z | - |
dc.date.issued | 1997 | en_HK |
dc.identifier.citation | Astrophysical Journal Letters, 1997, v. 487 n. 1 PART I, p. 370-379 | en_HK |
dc.identifier.issn | 2041-8205 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/43206 | - |
dc.description.abstract | We 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.extent | 375191 bytes | - |
dc.format.extent | 12158 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.format.mimetype | text/plain | - |
dc.language | eng | en_HK |
dc.publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205 | en_HK |
dc.relation.ispartof | Astrophysical Journal Letters | en_HK |
dc.rights | The Astrophysical Journal. Copyright © University of Chicago Press. | en_HK |
dc.subject | MHD | en_HK |
dc.subject | Pulsars: general | en_HK |
dc.subject | Radiation mechanisms: nonthermal | en_HK |
dc.subject | Stars: magnetic fields | en_HK |
dc.title | High-energy radiation from rapidly spinning pulsars with thick outer gaps | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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+Gaps | en_HK |
dc.identifier.email | Cheng, KS: hrspksc@hkucc.hku.hk | en_HK |
dc.identifier.authority | Cheng, KS=rp00675 | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1086/304589 | en_HK |
dc.identifier.scopus | eid_2-s2.0-21944450449 | en_HK |
dc.identifier.hkuros | 28441 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-21944450449&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 487 | en_HK |
dc.identifier.issue | 1 PART I | en_HK |
dc.identifier.spage | 370 | en_HK |
dc.identifier.epage | 379 | en_HK |
dc.identifier.isi | WOS:A1997XY50600033 | - |
dc.publisher.place | United Kingdom | en_HK |
dc.identifier.scopusauthorid | Zhang, L=38762428100 | en_HK |
dc.identifier.scopusauthorid | Cheng, KS=9745798500 | en_HK |
dc.identifier.issnl | 2041-8205 | - |