File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: X-ray and gamma-ray emissions from rotation powered millisecond pulsars

TitleX-ray and gamma-ray emissions from rotation powered millisecond pulsars
Authors
Keywordsbinaries: close
magnetic fields
pulsars: general
stars: neutron
Issue Date2012
PublisherInstitute of Physics Publishing, Inc. The Journal's web site is located at http://iopscience.iop.org/0004-637X/
Citation
Astrophysical Journal, 2012, v. 745 n. 1 How to Cite?
AbstractThe Fermi Large Area Telescope has revealed that rotation powered millisecond pulsars (MSPs) are a major contributor to the Galactic γ-ray source population. Such pulsars may also be important in modeling the quiescent state of several low-mass X-ray binaries (LMXBs), where optical observations of the companion star suggest the possible existence of rotation powered MSPs. To understand the observational properties of the different evolutionary stages of MSPs, the X-ray and γ-ray emissions associated with the outer gap model are investigated. For rotation powered MSPs, the size of the outer gap and the properties of the high-energy emission are controlled by either the photon-photon pair-creation process or magnetic pair-creation process near the surface. For these pulsars, we find that the outer gap model controlled by the magnetic pair-creation process is preferable in explaining the possible correlations between the γ-ray luminosity or non-thermal X-ray luminosity versus the spin-down power. For the accreting MSPs in quiescent LMXBs, the thermal X-ray emission at the neutron star (NS) surface resulting from deep crustal heating can control the conditions in the outer gap. We argue that the optical modulation observed in the quiescent state of several LMXBs originates from the irradiation of the donor star by γ-rays from the outer gap. In these systems, the irradiation luminosity required for the optical modulation of the source such as SAXJ1808.4-3658 can be achieved for a NS of high mass. Finally, we discuss the high-energy emission associated with an intra-binary shock in black widow systems, e.g., PSRB1957+20. © 2012. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/146409
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong GovernmentHKU700911P
Theoretical Institute for Advanced Research in Astrophysics (TIARA) under Academia Sinica Institute of Astronomy & Astrophysics in Taipei, Taiwan
Funding Information:

We thank A. H. Kong, C. Y. Hui, P. H. T. Tam, R. H. H. Huang, L.-C. C. Lin, M. Ruderman, and S. Shibata for the useful discussions. We express our appreciation to an anonymous referee for useful comments. J.T. and K. S. C. are supported by a GRF grant of Hong Kong Government under HKU700911P and R. E. T. is supported in part by the Theoretical Institute for Advanced Research in Astrophysics (TIARA) operated under the Academia Sinica Institute of Astronomy & Astrophysics in Taipei, Taiwan.

References

 

DC FieldValueLanguage
dc.contributor.authorTakata, Jen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorTaam, REen_HK
dc.date.accessioned2012-04-24T07:52:12Z-
dc.date.available2012-04-24T07:52:12Z-
dc.date.issued2012en_HK
dc.identifier.citationAstrophysical Journal, 2012, v. 745 n. 1en_HK
dc.identifier.issn0004-637Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/146409-
dc.description.abstractThe Fermi Large Area Telescope has revealed that rotation powered millisecond pulsars (MSPs) are a major contributor to the Galactic γ-ray source population. Such pulsars may also be important in modeling the quiescent state of several low-mass X-ray binaries (LMXBs), where optical observations of the companion star suggest the possible existence of rotation powered MSPs. To understand the observational properties of the different evolutionary stages of MSPs, the X-ray and γ-ray emissions associated with the outer gap model are investigated. For rotation powered MSPs, the size of the outer gap and the properties of the high-energy emission are controlled by either the photon-photon pair-creation process or magnetic pair-creation process near the surface. For these pulsars, we find that the outer gap model controlled by the magnetic pair-creation process is preferable in explaining the possible correlations between the γ-ray luminosity or non-thermal X-ray luminosity versus the spin-down power. For the accreting MSPs in quiescent LMXBs, the thermal X-ray emission at the neutron star (NS) surface resulting from deep crustal heating can control the conditions in the outer gap. We argue that the optical modulation observed in the quiescent state of several LMXBs originates from the irradiation of the donor star by γ-rays from the outer gap. In these systems, the irradiation luminosity required for the optical modulation of the source such as SAXJ1808.4-3658 can be achieved for a NS of high mass. Finally, we discuss the high-energy emission associated with an intra-binary shock in black widow systems, e.g., PSRB1957+20. © 2012. The American Astronomical Society. All rights reserved.en_HK
dc.languageengen_US
dc.publisherInstitute of Physics Publishing, Inc. The Journal's web site is located at http://iopscience.iop.org/0004-637X/en_HK
dc.relation.ispartofAstrophysical Journalen_HK
dc.rightsThe Astrophysical Journal. Copyright © Institute of Physics Publishing, Inc.-
dc.subjectbinaries: closeen_HK
dc.subjectmagnetic fieldsen_HK
dc.subjectpulsars: generalen_HK
dc.subjectstars: neutronen_HK
dc.titleX-ray and gamma-ray emissions from rotation powered millisecond pulsarsen_HK
dc.typeArticleen_HK
dc.identifier.emailTakata, J: takata@hku.hken_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityTakata, J=rp00786en_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0004-637X/745/1/100en_HK
dc.identifier.scopuseid_2-s2.0-84855809493en_HK
dc.identifier.hkuros199347en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84855809493&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume745en_HK
dc.identifier.issue1en_HK
dc.identifier.eissn1538-4357-
dc.identifier.isiWOS:000300316600100-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridTakata, J=22735157300en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridTaam, RE=7003756329en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats