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Article: The fundamental plane of gamma-ray globular clusters

TitleThe fundamental plane of gamma-ray globular clusters
Authors
KeywordsGamma rays: stars
Globular clusters: general
Pulsars: general
Stars: neutron
Issue Date2011
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal Letters, 2011, v. 726 n. 2 How to Cite?
AbstractWe have investigated the properties of a group of γ-ray-emitting globular clusters (GCs) that have recently been uncovered in our Galaxy. By correlating the observed γ-ray luminosity Lγwith various cluster properties, we probe the origin of the high-energy photons from these GCs. We report that Lγis positively correlated with the encounter rate Ãc and the metallicity [Fe/H], which places an intimate link between the γ-ray emission and the millisecond-pulsar population. We also find a tendency that Lγincreases with the energy densities of the soft photon at the cluster location. Furthermore, the two-dimensional regression analysis suggests that Lγ, soft-photon densities, and Ãc/[Fe/H] possibly span fundamental planes; this finding could potentially provide better predictions for the γ-ray properties of GCs. © 2011 The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/133264
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369
ISI Accession Number ID
Funding AgencyGrant Number
Chungnam National University
Hong Kong governmentHKU700908P
RFBR08-02-00170-a
RP09N04
NSCRP09N04
National Science Council of the Republic of China (Taiwan)NSC96-2112-M007-037-MY3
Kenda Foundation
09-02-92000-HHC-a
Funding Information:

The authors thank Kinwah Wu and the anonymous referee forthe useful discussion and providing comments for improving the quality of this manuscript. C.Y.H. is supported by a research fund from Chungnam National University in 2010. K.S.C. is supported by a GRF grant from the Hong Kong government under HKU700908P. D.O.C. and V.A.D. are supported by the RFBR grant 08-02-00170-a, the NSC-RFBR Joint Research Project RP09N04, and 09-02-92000-HHC-a. A.K.H.K. is supported partly by the National Science Council of the Republic of China (Taiwan) through grant NSC96-2112-M007-037-MY3 and a Kenda Foundation Golden Jade Fellowship.

References

 

DC FieldValueLanguage
dc.contributor.authorHui, CYen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorWang, Yen_HK
dc.contributor.authorTam, PHTen_HK
dc.contributor.authorKong, AKHen_HK
dc.contributor.authorChernyshov, DOen_HK
dc.contributor.authorDogiel, VAen_HK
dc.date.accessioned2011-05-06T08:34:42Z-
dc.date.available2011-05-06T08:34:42Z-
dc.date.issued2011en_HK
dc.identifier.citationAstrophysical Journal Letters, 2011, v. 726 n. 2en_HK
dc.identifier.issn2041-8205en_HK
dc.identifier.urihttp://hdl.handle.net/10722/133264-
dc.description.abstractWe have investigated the properties of a group of γ-ray-emitting globular clusters (GCs) that have recently been uncovered in our Galaxy. By correlating the observed γ-ray luminosity Lγwith various cluster properties, we probe the origin of the high-energy photons from these GCs. We report that Lγis positively correlated with the encounter rate Ãc and the metallicity [Fe/H], which places an intimate link between the γ-ray emission and the millisecond-pulsar population. We also find a tendency that Lγincreases with the energy densities of the soft photon at the cluster location. Furthermore, the two-dimensional regression analysis suggests that Lγ, soft-photon densities, and Ãc/[Fe/H] possibly span fundamental planes; this finding could potentially provide better predictions for the γ-ray properties of GCs. © 2011 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. Copyright © Institute of Physics Publishing, Inc.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectGamma rays: starsen_HK
dc.subjectGlobular clusters: generalen_HK
dc.subjectPulsars: generalen_HK
dc.subjectStars: neutronen_HK
dc.titleThe fundamental plane of gamma-ray globular clustersen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-637X&volume=726&issue=2 article no. 100&spage=&epage=&date=2011&atitle=The+fundamental+plane+of+gamma-ray+globular+clusters-
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1088/0004-637X/726/2/100en_HK
dc.identifier.scopuseid_2-s2.0-84891196177en_HK
dc.identifier.hkuros184977-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79960282225&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume726en_HK
dc.identifier.issue2en_HK
dc.identifier.isiWOS:000285623600044-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHui, CY=12781234500en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridWang, Y=36085420300en_HK
dc.identifier.scopusauthoridTam, PHT=35243989500en_HK
dc.identifier.scopusauthoridKong, AKH=35185316600en_HK
dc.identifier.scopusauthoridChernyshov, DO=14059433800en_HK
dc.identifier.scopusauthoridDogiel, VA=6603566238en_HK

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