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Article: Dynamical formation of millisecond pulsars in globular clusters

TitleDynamical formation of millisecond pulsars in globular clusters
Authors
KeywordsGlobular clusters: general
Pulsars: general
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. 714 n. 2, p. 1149-1154 How to Cite?
AbstractThe cumulative luminosity distribution functions (CLFs) of radio millisecond pulsars (MSPs) in globular clusters (GCs) and in the Galactic field at a frequency of 1.4GHz have been examined. Assuming a functional form, N ∝ Lq where N is the number of MSPs and L is the luminosity at 1.4GHz, it is found that the CLFs significantly differ with a steeper slope, q = -0.83 0.05, in GCs than in the Galactic field (q = -0.48 0.04), suggesting a different formation or evolutionary history of MSPs in these two regions of the Galaxy. To probe the production mechanism of MSPs in clusters, a search of the possible relationships between the MSP population and cluster properties was carried out. The results of an investigation of nine GCs indicate positive correlations between the MSP population and the stellar encounter rate and metallicity. This provides additional evidence suggesting that stellar dynamical interactions are important in the formation of the MSP population in GCs. © 2010 The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/65435
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong GovernmentHKU700908P
NSF at Northwestern UniversityAST-0703950
Theoretical Institute for Advanced Research in Astrophysics (TIARA)
Funding Information:

K. S. C. was supported by a GRF grant of Hong Kong Government under HKU700908P. R. E. T. was supported in part by NSF grant AST-0703950 at Northwestern University and by the Theoretical Institute for Advanced Research in Astrophysics (TIARA) operated under the Academia Sinica Institute of Astronomy and Astrophysics in Taipei, Taiwan.

References

 

DC FieldValueLanguage
dc.contributor.authorHui, CYen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorTaam, REen_HK
dc.date.accessioned2010-08-04T07:49:12Z-
dc.date.available2010-08-04T07:49:12Z-
dc.date.issued2010en_HK
dc.identifier.citationAstrophysical Journal Letters, 2010, v. 714 n. 2, p. 1149-1154en_HK
dc.identifier.issn2041-8205en_HK
dc.identifier.urihttp://hdl.handle.net/10722/65435-
dc.description.abstractThe cumulative luminosity distribution functions (CLFs) of radio millisecond pulsars (MSPs) in globular clusters (GCs) and in the Galactic field at a frequency of 1.4GHz have been examined. Assuming a functional form, N ∝ Lq where N is the number of MSPs and L is the luminosity at 1.4GHz, it is found that the CLFs significantly differ with a steeper slope, q = -0.83 0.05, in GCs than in the Galactic field (q = -0.48 0.04), suggesting a different formation or evolutionary history of MSPs in these two regions of the Galaxy. To probe the production mechanism of MSPs in clusters, a search of the possible relationships between the MSP population and cluster properties was carried out. The results of an investigation of nine GCs indicate positive correlations between the MSP population and the stellar encounter rate and metallicity. This provides additional evidence suggesting that stellar dynamical interactions are important in the formation of the MSP population in GCs. © 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.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsThe Astrophysical Journal. Copyright © American Astronomical Society.-
dc.subjectGlobular clusters: generalen_HK
dc.subjectPulsars: generalen_HK
dc.titleDynamical formation of millisecond pulsars in globular clustersen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-637X&volume=714&issue=2&spage=1149&epage=1154&date=2010&atitle=Dynamical+formation+of+millisecond+pulsars+in+globular+clusters-
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1088/0004-637X/714/2/1149en_HK
dc.identifier.scopuseid_2-s2.0-77951673962en_HK
dc.identifier.hkuros170016-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77951673962&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume714en_HK
dc.identifier.issue2en_HK
dc.identifier.spage1149en_HK
dc.identifier.epage1154en_HK
dc.identifier.isiWOS:000276973100014-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHui, CY=12781234500en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridTaam, RE=7003756329en_HK

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