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Article: Photon emissivity of the electrosphere of bare strange stars

TitlePhoton emissivity of the electrosphere of bare strange stars
Authors
KeywordsDense matter
Elementary particles
Radiation mechanisms: general
Issue Date2005
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2005, v. 622 n. 2 I, p. 1033-1043 How to Cite?
AbstractWe consider the spectrum, emissivity, and flux of the electromagnetic radiation emitted by the thin electron layer (the electrosphere) at the surface of a bare strange star. In particular, we carefully consider the effect of the multiple and uncorrelated scattering on the radiation spectrum (the Landau-Pomeranchuk-Migdal effect), together with the effect of the strong electric field at the surface of the star. The presence of the electric field strongly influences the radiation spectrum emitted by the electrosphere. All the radiation properties of the electrons in the electrosphere essentially depend on the value of the electric potential at the quark star surface. The effect of the multiple scattering, which strongly suppresses radiation emission, is important only for the dense layer of the electrosphere situated near the star's surface and only for high values of the surface electric potential of the star. Hence a typical bremsstrahlung radiation spectrum, which could extend to very low frequencies, could be one of the main observational signatures even for low-temperature quark stars. © 2005. The American Astronomical Society, All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/43465
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHarko, Ten_HK
dc.contributor.authorCheng, KSen_HK
dc.date.accessioned2007-03-23T04:46:13Z-
dc.date.available2007-03-23T04:46:13Z-
dc.date.issued2005en_HK
dc.identifier.citationAstrophysical Journal Letters, 2005, v. 622 n. 2 I, p. 1033-1043en_HK
dc.identifier.issn2041-8205en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43465-
dc.description.abstractWe consider the spectrum, emissivity, and flux of the electromagnetic radiation emitted by the thin electron layer (the electrosphere) at the surface of a bare strange star. In particular, we carefully consider the effect of the multiple and uncorrelated scattering on the radiation spectrum (the Landau-Pomeranchuk-Migdal effect), together with the effect of the strong electric field at the surface of the star. The presence of the electric field strongly influences the radiation spectrum emitted by the electrosphere. All the radiation properties of the electrons in the electrosphere essentially depend on the value of the electric potential at the quark star surface. The effect of the multiple scattering, which strongly suppresses radiation emission, is important only for the dense layer of the electrosphere situated near the star's surface and only for high values of the surface electric potential of the star. Hence a typical bremsstrahlung radiation spectrum, which could extend to very low frequencies, could be one of the main observational signatures even for low-temperature quark stars. © 2005. The American Astronomical Society, All rights reserved.en_HK
dc.format.extent317136 bytes-
dc.format.extent122136 bytes-
dc.format.extent12158 bytes-
dc.format.mimetypeapplication/pdf-
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.subjectDense matteren_HK
dc.subjectElementary particlesen_HK
dc.subjectRadiation mechanisms: generalen_HK
dc.titlePhoton emissivity of the electrosphere of bare strange starsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-637X&volume=622&issue=2 pt 1&spage=1033&epage=1043&date=2005&atitle=Photon+Emissivity+of+the+Electrosphere+of+Bare+Strange+Starsen_HK
dc.identifier.emailHarko, T: harko@hkucc.hku.hken_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityHarko, T=rp01333en_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1086/428036en_HK
dc.identifier.scopuseid_2-s2.0-19944376863en_HK
dc.identifier.hkuros97625-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-19944376863&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume622en_HK
dc.identifier.issue2 Ien_HK
dc.identifier.spage1033en_HK
dc.identifier.epage1043en_HK
dc.identifier.isiWOS:000228093400024-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHarko, T=7006485783en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK

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