File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: A model of nonthermal radiation from accreting X-ray pulsars

TitleA model of nonthermal radiation from accreting X-ray pulsars
Authors
KeywordsAccretion, Accretion Disks
Binaries: Close
Mhd
Pulsars: General
Radiation Mechanisms: Miscellaneous
Stars: Neutron
Issue Date1993
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 1993, v. 410 n. 1, p. 309-314 How to Cite?
AbstractThe formation of accelerator gaps in the magnetosphere of accreting X-ray pulsars, especially in the regions above the inner part of the accreting disk has been proposed. In this paper, we concentrate on the case where the gaps are filled with soft X-ray photons which arise from the accretion-powered thermal X-rays at the polar caps, but are Compton-degraded when they traverse the accretion matter flow. The high-energy electron current, whose existence is assumed to counter balance the positive ion (proton) flow, boosts these soft X-rays up to γ-rays by inverse Compton scattering. Only very few of these γ-rays, however, can be directly observed on Earth because most of them collide with the thermal X-ray photons from the polar caps outside the gaps. This generates e± pairs which, in turn, will emit a new generation of nonthermal X-rays by synchrotron radiation. In some sources this nonthermal X-ray spectrum should be detectable. Examples are worked out for Her X-1, 4U 0115+63, Vel X-1, Cen X-3 and Cyg X-3, and they show that the modeled spectra may be observed at photon energies either smaller than a few tenths of keV and/or larger than a few tens of keV.
Persistent Identifierhttp://hdl.handle.net/10722/174919
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369

 

DC FieldValueLanguage
dc.contributor.authorLeung, PPen_US
dc.contributor.authorCheng, KSen_US
dc.contributor.authorFung, PCWen_US
dc.date.accessioned2012-11-26T08:48:07Z-
dc.date.available2012-11-26T08:48:07Z-
dc.date.issued1993en_US
dc.identifier.citationAstrophysical Journal Letters, 1993, v. 410 n. 1, p. 309-314en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/174919-
dc.description.abstractThe formation of accelerator gaps in the magnetosphere of accreting X-ray pulsars, especially in the regions above the inner part of the accreting disk has been proposed. In this paper, we concentrate on the case where the gaps are filled with soft X-ray photons which arise from the accretion-powered thermal X-rays at the polar caps, but are Compton-degraded when they traverse the accretion matter flow. The high-energy electron current, whose existence is assumed to counter balance the positive ion (proton) flow, boosts these soft X-rays up to γ-rays by inverse Compton scattering. Only very few of these γ-rays, however, can be directly observed on Earth because most of them collide with the thermal X-ray photons from the polar caps outside the gaps. This generates e± pairs which, in turn, will emit a new generation of nonthermal X-rays by synchrotron radiation. In some sources this nonthermal X-ray spectrum should be detectable. Examples are worked out for Her X-1, 4U 0115+63, Vel X-1, Cen X-3 and Cyg X-3, and they show that the modeled spectra may be observed at photon energies either smaller than a few tenths of keV and/or larger than a few tens of keV.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.subjectAccretion, Accretion Disksen_US
dc.subjectBinaries: Closeen_US
dc.subjectMhden_US
dc.subjectPulsars: Generalen_US
dc.subjectRadiation Mechanisms: Miscellaneousen_US
dc.subjectStars: Neutronen_US
dc.titleA model of nonthermal radiation from accreting X-ray pulsarsen_US
dc.typeArticleen_US
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_US
dc.identifier.authorityCheng, KS=rp00675en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-12044259524en_US
dc.identifier.volume410en_US
dc.identifier.issue1en_US
dc.identifier.spage309en_US
dc.identifier.epage314en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLeung, PP=7401749062en_US
dc.identifier.scopusauthoridCheng, KS=9745798500en_US
dc.identifier.scopusauthoridFung, PCW=7101613315en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats