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Article: Modeling the multiwavelength light curves of PSR B1259-63/LS 2883. II. the effects of anisotropic pulsar wind and Doppler boosting

TitleModeling the multiwavelength light curves of PSR B1259-63/LS 2883. II. the effects of anisotropic pulsar wind and Doppler boosting
Authors
Keywordsbinaries: close
gamma rays: stars
pulsars: individual (PSR B1259-63)
X-rays: binaries
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. 753 n. 2 How to Cite?
AbstractPSR B1259-63/LS 2883 is a binary system in which a 48ms pulsar orbits around a Be star in a high eccentric orbit with a long orbital period of about 3.4yr. It is special for having asymmetric two-peak profiles in both the X-ray and TeV light curves. Recently, an unexpected GeV flare has been detected by the Fermi gamma-ray observatory several weeks after the last periastron passage. In this paper, we show that this observed GeV flare could be produced by the Doppler-boosted synchrotron emission in the bow-shock tail. An anisotropic pulsar wind model, which mainly affects the energy flux injection into the termination shock in a different orbital phase, is also used in this paper, and we find that the anisotropy in the pulsar wind can play a significant role in producing the asymmetric two-peak profiles in both X-ray and TeV light curves. The X-ray and TeV photons before periastron are mainly produced by the shocked electrons around the shock apex, and the light curves after periastron are contributed by the emission from the shock apex and the shock tail together, which result in asymmetric two-peak light curves. © 2012. The American Astronomical Society. All rights reserved..
Persistent Identifierhttp://hdl.handle.net/10722/152808
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID
Funding AgencyGrant Number
GRF of the Hong Kong GovernmentHKU700911p
National Natural Science Foundation of China11033002
National Basic Research Program of China (973 Program)2009CB824800
Funding Information:

We thank the anonymous referee for stimulating suggestions that led to an overall improvement of this study. We also thank Y. W. Yu for helpful suggestions and discussion. This research was supported by a 2011 GRF grant of the Hong Kong Government under HKU700911p. Y. F. H. was supported by the National Natural Science Foundation of China (Grant No. 11033002) and the National Basic Research Program of China (973 Program, Grant No. 2009CB824800).

References

 

DC FieldValueLanguage
dc.contributor.authorKong, SWen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorHuang, YFen_HK
dc.date.accessioned2012-07-16T09:49:10Z-
dc.date.available2012-07-16T09:49:10Z-
dc.date.issued2012en_HK
dc.identifier.citationAstrophysical Journal, 2012, v. 753 n. 2en_HK
dc.identifier.issn0004-637Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/152808-
dc.description.abstractPSR B1259-63/LS 2883 is a binary system in which a 48ms pulsar orbits around a Be star in a high eccentric orbit with a long orbital period of about 3.4yr. It is special for having asymmetric two-peak profiles in both the X-ray and TeV light curves. Recently, an unexpected GeV flare has been detected by the Fermi gamma-ray observatory several weeks after the last periastron passage. In this paper, we show that this observed GeV flare could be produced by the Doppler-boosted synchrotron emission in the bow-shock tail. An anisotropic pulsar wind model, which mainly affects the energy flux injection into the termination shock in a different orbital phase, is also used in this paper, and we find that the anisotropy in the pulsar wind can play a significant role in producing the asymmetric two-peak profiles in both X-ray and TeV light curves. The X-ray and TeV photons before periastron are mainly produced by the shocked electrons around the shock apex, and the light curves after periastron are contributed by the emission from the shock apex and the shock tail together, which result in asymmetric two-peak light curves. © 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.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectbinaries: closeen_HK
dc.subjectgamma rays: starsen_HK
dc.subjectpulsars: individual (PSR B1259-63)en_HK
dc.subjectX-rays: binariesen_HK
dc.titleModeling the multiwavelength light curves of PSR B1259-63/LS 2883. II. the effects of anisotropic pulsar wind and Doppler boostingen_HK
dc.typeArticleen_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1088/0004-637X/753/2/127en_HK
dc.identifier.scopuseid_2-s2.0-84862890268en_HK
dc.identifier.hkuros200930en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84862890268&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume753en_HK
dc.identifier.issue2en_HK
dc.identifier.eissn1538-4357-
dc.identifier.isiWOS:000305912700034-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridKong, SW=35112235700en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridHuang, YF=24448042100en_HK

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