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Article: Evidence for gamma-ray emission from the low-mass X-ray binary system first J102347.6+003841

TitleEvidence for gamma-ray emission from the low-mass X-ray binary system first J102347.6+003841
Authors
KeywordsGamma rays: stars
Pulsars: individual (PSR 1023+0038)
X-rays: binaries
Issue Date2010
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2010, v. 724 n. 2 PART 2, p. L207-L211 How to Cite?
AbstractThe low-mass X-ray binary (LMXB) system FIRST J102347.6+003841 hosts a newly born millisecond pulsar (MSP) PSR J1023+0038 that was revealed as the first and only known rotation-powered MSP in a quiescent LMXB. While the system is shown to have an accretion disk before 2002, it remains unclear how the accretion disk has been removed in order to reveal the radio pulsation in 2007. In this Letter, we report the discovery of γ -rays spatially consistent with FIRST J102347.6+003841, at a significance of seven standarddeviations, using data obtained by the Fermi Gamma-ray Space Telescope. The γ -ray spectrum can be described by a power law (PL) with a photon index of 2.9 ± 0.2, resulting in an energy flux above 200 MeV of (5.5 ± 0.9) × 10 -12 ergcm -2 s -1. The γ -rays likely originate from the MSP PSR J1023+0038, but also possibly from an intrabinary shock between the pulsar and its companion star. To complement the γ -ray study, we also re-investigate the XMM-Newton data taken in 2004 and 2008. Our X-ray spectral analysis suggests that a broken PL with two distinct photon indices describes the X-ray data significantly better than a single PL. This indicates that there exists two components and that both components appear to vary with the orbital phase. The evidence for γ -ray emission conforms with a recent suggestionthat γ -rays from PSR J1023+0038 may be responsible for ejecting the disk materialout of the system. © 2010. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/133262
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
Funding AgencyGrant Number
Chungnam National University
National Science Council of the Republic of China (Taiwan)NSC99-2112-M-007-004-MY3
NSC99-2811-M-008-057
European CommunityITN 215212
Hong Kong GovernmentHKU700908P
Funding Information:

We acknowledge the use of data and software facilities from the FSSC, managed by the HEASARC at the Goddard Space Flight Center. C.Y.H. is supported by research fund of Chungnam National University in 2010. A. K. H. K. and L. C. C. L. are supported partly by the National Science Council of the Republic of China (Taiwan) through grant NSC99-2112-M-007-004-MY3 and NSC99-2811-M-008-057, respectively. Y.J.Y. has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement number ITN 215212 "Black Hole Universe." K. S. C. is supported by a GRF grant of Hong Kong Government under HKU700908P.

References

 

DC FieldValueLanguage
dc.contributor.authorTam, PHTen_HK
dc.contributor.authorHui, CYen_HK
dc.contributor.authorHuang, RHHen_HK
dc.contributor.authorKong, AKHen_HK
dc.contributor.authorTakata, Jen_HK
dc.contributor.authorLin, LCCen_HK
dc.contributor.authorYang, YJen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorTaam, REen_HK
dc.date.accessioned2011-05-06T06:03:37Z-
dc.date.available2011-05-06T06:03:37Z-
dc.date.issued2010en_HK
dc.identifier.citationAstrophysical Journal Letters, 2010, v. 724 n. 2 PART 2, p. L207-L211en_HK
dc.identifier.issn2041-8205en_HK
dc.identifier.urihttp://hdl.handle.net/10722/133262-
dc.description.abstractThe low-mass X-ray binary (LMXB) system FIRST J102347.6+003841 hosts a newly born millisecond pulsar (MSP) PSR J1023+0038 that was revealed as the first and only known rotation-powered MSP in a quiescent LMXB. While the system is shown to have an accretion disk before 2002, it remains unclear how the accretion disk has been removed in order to reveal the radio pulsation in 2007. In this Letter, we report the discovery of γ -rays spatially consistent with FIRST J102347.6+003841, at a significance of seven standarddeviations, using data obtained by the Fermi Gamma-ray Space Telescope. The γ -ray spectrum can be described by a power law (PL) with a photon index of 2.9 ± 0.2, resulting in an energy flux above 200 MeV of (5.5 ± 0.9) × 10 -12 ergcm -2 s -1. The γ -rays likely originate from the MSP PSR J1023+0038, but also possibly from an intrabinary shock between the pulsar and its companion star. To complement the γ -ray study, we also re-investigate the XMM-Newton data taken in 2004 and 2008. Our X-ray spectral analysis suggests that a broken PL with two distinct photon indices describes the X-ray data significantly better than a single PL. This indicates that there exists two components and that both components appear to vary with the orbital phase. The evidence for γ -ray emission conforms with a recent suggestionthat γ -rays from PSR J1023+0038 may be responsible for ejecting the disk materialout of the system. © 2010. The American Astronomical Society. All rights reserved.en_HK
dc.languageeng-
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.rightsThe Astrophysical Journal Letters. Copyright © Institute of Physics Publishing Ltd.-
dc.subjectGamma rays: starsen_HK
dc.subjectPulsars: individual (PSR 1023+0038)en_HK
dc.subjectX-rays: binariesen_HK
dc.titleEvidence for gamma-ray emission from the low-mass X-ray binary system first J102347.6+003841en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=2041-8205&volume=724&spage=L207&epage=L211&date=2010&atitle=Evidence+for+gamma-ray+emission+from+the+low-mass+x-ray+binary+system+first+J102347.6+003841-
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.doi10.1088/2041-8205/724/2/L207en_HK
dc.identifier.scopuseid_2-s2.0-78650459875en_HK
dc.identifier.hkuros184971-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78650459875&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume724en_HK
dc.identifier.issue2 PART 2en_HK
dc.identifier.spageL207en_HK
dc.identifier.epageL211en_HK
dc.identifier.isiWOS:000284150700017-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridTam, PHT=35243989500en_HK
dc.identifier.scopusauthoridHui, CY=12781234500en_HK
dc.identifier.scopusauthoridHuang, RHH=36696348700en_HK
dc.identifier.scopusauthoridKong, AKH=35185316600en_HK
dc.identifier.scopusauthoridTakata, J=22735157300en_HK
dc.identifier.scopusauthoridLin, LCC=24366370500en_HK
dc.identifier.scopusauthoridYang, YJ=36616000600en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridTaam, RE=7003756329en_HK

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