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Article: Discovery of an unidentified Fermi object as a black widow-like millisecond pulsar

TitleDiscovery of an unidentified Fermi object as a black widow-like millisecond pulsar
Authors
Keywordsbinaries: close
gamma rays: stars
pulsars: general
stars: individual (1FGL J2339.7-0531, SDSS J233938.74-053305.2)
X-rays: stars
Issue Date2012
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2012, v. 747 n. 1 How to Cite?
AbstractThe Fermi γ-ray Space Telescope has revolutionized our knowledge of the γ-ray pulsar population, leading to the discovery of almost 100 γ-ray pulsars and dozens of γ-ray millisecond pulsars (MSPs). Although the outer-gap model predicts different sites of emission for the radio and γ-ray pulsars, until now all of the known γ-ray MSPs have been visible in the radio. Here we report the discovery of a "radio-quiet" γ-ray-emitting MSP candidate by using Fermi, Chandra, Swift, and optical observations. The X-ray and γ-ray properties of the source are consistent with known γ-ray pulsars. We also found a 4.63 hr orbital period in optical and X-ray data. We suggest that the source is a black widow-like MSP with a 0.1 M ⊙ late-type companion star. Based on the profile of the optical and X-ray light curves, the companion star is believed to be heated by the pulsar while the X-ray emissions originate from pulsar magnetosphere and/or from intrabinary shock. No radio detection of the source has been reported yet, and although no γ-ray/radio pulsation has been found we estimate that the spin period of the MSP is 3-5 ms based on the inferred γ-ray luminosity. © 2012 The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/146412
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
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
Chandra awardGO0-11022A
National Research Foundation of Korea2011-0023383
GRFHKU 700911P
Funding Information:

We thank the supporting staff at the Lulin Observatory for arranging the service observations. The Lulin Observatory is operated by the Graduate Institute of Astronomy in National Central University, Taiwan. We also thank Roger Romani for providing insights and useful comments as well as his quick-look optical spectroscopic results. 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. C. C. C. and D. D. were supported in part by Chandra award GO0-11022A. C.Y.H. is supported by the National Research Foundation of Korea through grant 2011-0023383. K. S. C. and J.T. are supported by the GRF grant HKU 700911P.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorKong, AKHen_HK
dc.contributor.authorHuang, RHHen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorTakata, Jen_HK
dc.contributor.authorYatsu, Yen_HK
dc.contributor.authorCheung, CCen_HK
dc.contributor.authorDonato, Den_HK
dc.contributor.authorLin, LCCen_HK
dc.contributor.authorKataoka, Jen_HK
dc.contributor.authorTakahashi, Yen_HK
dc.contributor.authorMaeda, Ken_HK
dc.contributor.authorHui, CYen_HK
dc.contributor.authorTam, PHTen_HK
dc.date.accessioned2012-04-24T07:52:14Z-
dc.date.available2012-04-24T07:52:14Z-
dc.date.issued2012en_HK
dc.identifier.citationAstrophysical Journal Letters, 2012, v. 747 n. 1en_HK
dc.identifier.issn2041-8205en_HK
dc.identifier.urihttp://hdl.handle.net/10722/146412-
dc.description.abstractThe Fermi γ-ray Space Telescope has revolutionized our knowledge of the γ-ray pulsar population, leading to the discovery of almost 100 γ-ray pulsars and dozens of γ-ray millisecond pulsars (MSPs). Although the outer-gap model predicts different sites of emission for the radio and γ-ray pulsars, until now all of the known γ-ray MSPs have been visible in the radio. Here we report the discovery of a "radio-quiet" γ-ray-emitting MSP candidate by using Fermi, Chandra, Swift, and optical observations. The X-ray and γ-ray properties of the source are consistent with known γ-ray pulsars. We also found a 4.63 hr orbital period in optical and X-ray data. We suggest that the source is a black widow-like MSP with a 0.1 M ⊙ late-type companion star. Based on the profile of the optical and X-ray light curves, the companion star is believed to be heated by the pulsar while the X-ray emissions originate from pulsar magnetosphere and/or from intrabinary shock. No radio detection of the source has been reported yet, and although no γ-ray/radio pulsation has been found we estimate that the spin period of the MSP is 3-5 ms based on the inferred γ-ray luminosity. © 2012 The American Astronomical Society. All rights reserved.en_HK
dc.languageengen_US
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.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectbinaries: closeen_HK
dc.subjectgamma rays: starsen_HK
dc.subjectpulsars: generalen_HK
dc.subjectstars: individual (1FGL J2339.7-0531, SDSS J233938.74-053305.2)en_HK
dc.subjectX-rays: starsen_HK
dc.titleDiscovery of an unidentified Fermi object as a black widow-like millisecond pulsaren_HK
dc.typeArticleen_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.emailTakata, J: takata@hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.identifier.authorityTakata, J=rp00786en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1088/2041-8205/747/1/L3en_HK
dc.identifier.scopuseid_2-s2.0-84857592291en_HK
dc.identifier.hkuros199350en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84857592291&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume747en_HK
dc.identifier.issue1en_HK
dc.identifier.isiWOS:000301192800003-
dc.publisher.placeUnited Kingdomen_HK
dc.relation.projectGamma-ray Pulsars-
dc.identifier.scopusauthoridKong, AKH=35185316600en_HK
dc.identifier.scopusauthoridHuang, RHH=36696348700en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridTakata, J=22735157300en_HK
dc.identifier.scopusauthoridYatsu, Y=10238844100en_HK
dc.identifier.scopusauthoridCheung, CC=23102309500en_HK
dc.identifier.scopusauthoridDonato, D=55032997100en_HK
dc.identifier.scopusauthoridLin, LCC=24366370500en_HK
dc.identifier.scopusauthoridKataoka, J=25637485000en_HK
dc.identifier.scopusauthoridTakahashi, Y=44561695100en_HK
dc.identifier.scopusauthoridMaeda, K=35370205500en_HK
dc.identifier.scopusauthoridHui, CY=12781234500en_HK
dc.identifier.scopusauthoridTam, PHT=35243989500en_HK

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