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Article: Discovery of γ-ray pulsation and X-ray emission from the black widow pulsar PSRJ2051-0827

TitleDiscovery of γ-ray pulsation and X-ray emission from the black widow pulsar PSRJ2051-0827
Authors
Keywordsgamma rays: stars
pulsars: individual (PSR J2051-0827)
X-rays: individuals (PSR J2051-0827)
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. 748 n. 2 How to Cite?
AbstractWe report the discovery of pulsed γ-ray emission and X-ray emission from the black widow millisecond pulsar PSRJ2051-0827 by using the data from the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope and the Advanced CCD Imaging Spectrometer array on the Chandra X-Ray Observatory. Using threeyears of LAT data, PSRJ2051-0827 is clearly detected in γ-rays with a significance of 8σ in the 0.2-20GeV band. The 200MeV-20GeV γ-ray spectrum of PSRJ2051-0827 can be modeled by a simple power law with a photon index of 2.46 0.15. Significant (5σ) γ-ray pulsations at the radio period were detected. PSRJ2051-0827 was also detected in soft (0.3-7keV) X-ray with Chandra. By comparing the observed γ-rays and X-rays with theoretical models, we suggest that the γ-ray emission is from the outer gap while the X-rays can be from intra-binary shock and pulsar magnetospheric synchrotron emissions. © 2012. The American Astronomical Society. All rights reserved..
Persistent Identifierhttp://hdl.handle.net/10722/146902
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID
Funding AgencyGrant Number
National Science Council of the Republic of China (Taiwan)NSC100-2628-M-007-002-MY3
NSC100-2923-M-007-001-MY3
Kenda Foundation
GRF of HK GovernmentHKU700911P
Funding Information:

This project is supported by the National Science Council of the Republic of China (Taiwan) through grants NSC100-2628-M-007-002-MY3 and NSC100-2923-M-007-001-MY3. A. K. H. K. gratefully acknowledges support from a Kenda Foundation Golden Jade Fellowship. J.T. and K. S. C. are supported by a GRF grant of HK Government under HKU700911P.

References

 

DC FieldValueLanguage
dc.contributor.authorWu, JHKen_HK
dc.contributor.authorKong, AKHen_HK
dc.contributor.authorHuang, RHHen_HK
dc.contributor.authorTakata, Jen_HK
dc.contributor.authorTam, PHTen_HK
dc.contributor.authorWu, EMHen_HK
dc.contributor.authorCheng, KSen_HK
dc.date.accessioned2012-05-23T05:49:04Z-
dc.date.available2012-05-23T05:49:04Z-
dc.date.issued2012en_HK
dc.identifier.citationAstrophysical Journal, 2012, v. 748 n. 2en_HK
dc.identifier.issn0004-637Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/146902-
dc.description.abstractWe report the discovery of pulsed γ-ray emission and X-ray emission from the black widow millisecond pulsar PSRJ2051-0827 by using the data from the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope and the Advanced CCD Imaging Spectrometer array on the Chandra X-Ray Observatory. Using threeyears of LAT data, PSRJ2051-0827 is clearly detected in γ-rays with a significance of 8σ in the 0.2-20GeV band. The 200MeV-20GeV γ-ray spectrum of PSRJ2051-0827 can be modeled by a simple power law with a photon index of 2.46 0.15. Significant (5σ) γ-ray pulsations at the radio period were detected. PSRJ2051-0827 was also detected in soft (0.3-7keV) X-ray with Chandra. By comparing the observed γ-rays and X-rays with theoretical models, we suggest that the γ-ray emission is from the outer gap while the X-rays can be from intra-binary shock and pulsar magnetospheric synchrotron emissions. © 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.subjectgamma rays: starsen_HK
dc.subjectpulsars: individual (PSR J2051-0827)en_HK
dc.subjectX-rays: individuals (PSR J2051-0827)en_HK
dc.titleDiscovery of γ-ray pulsation and X-ray emission from the black widow pulsar PSRJ2051-0827en_HK
dc.typeArticleen_HK
dc.identifier.emailTakata, J: takata@hku.hken_HK
dc.identifier.authorityTakata, J=rp00786en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0004-637X/748/2/141en_HK
dc.identifier.scopuseid_2-s2.0-84863350448en_HK
dc.identifier.hkuros199807en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84863350448&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume748en_HK
dc.identifier.issue2en_HK
dc.identifier.isiWOS:000302135200069-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridWu, JHK=44561713000en_HK
dc.identifier.scopusauthoridKong, AKH=35185316600en_HK
dc.identifier.scopusauthoridHuang, RHH=36696348700en_HK
dc.identifier.scopusauthoridTakata, J=22735157300en_HK
dc.identifier.scopusauthoridTam, PHT=35243989500en_HK
dc.identifier.scopusauthoridWu, EMH=44561555200en_HK
dc.identifier.scopusauthoridCheng, KS=55272778200en_HK

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