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Article: Distribution of the disrupted satellite galaxies as a function of metallicity

TitleDistribution of the disrupted satellite galaxies as a function of metallicity
Authors
KeywordsAbundance
Evolution
Galaxies: halos
Interactions
Issue Date2002
PublisherE D P Sciences. The Journal's web site is located at http://www.aanda.org
Citation
Astronomy And Astrophysics, 2002, v. 389 n. 2, p. 387-392 How to Cite?
AbstractRecent observations show that some dwarf satellite galaxies fall into the gravitational well of the Galaxy while being disrupted by the tidal force. As a consequence, the Galactic halo suffers contamination from this process, the stellar populations of the tidal disrupted satellites make an additional contribution and alter the intrinsic metallicity distribution of the halo stars. The distribution of this kind of disrupted satellite galaxy as a function of metallicity is investigated in this paper. The model is limited to one class of dwarf spherical satellite galaxy, that is assumed to have similar abundance patterns to the Galactic field halo stars. We discuss their distributions through the links between minor merger processes in the history of the Galaxy and the observed distribution of metal-poor field halo stars. The upper limit of 35% of the metal-poor halo field stars was established by merging of this kind of satellite galaxy with characteristic mass M sat, and adopting the mass-metallicity relation among dwarf spheroidal galaxy, the distribution of the disrupted satellite galaxy as a function of metallicity is derived to reproduce the observed metallicity distribution of the extremely metal-poor halo field stars in the Galaxy. The problem of missing metal-free halo stars in the Galaxy is explained in this model as well.
Persistent Identifierhttp://hdl.handle.net/10722/80676
ISSN
2014 Impact Factor: 4.378
2015 SCImago Journal Rankings: 2.446
References

 

DC FieldValueLanguage
dc.contributor.authorLu, Yen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorDeng, LCen_HK
dc.contributor.authorZheng, XZen_HK
dc.date.accessioned2010-09-06T08:09:04Z-
dc.date.available2010-09-06T08:09:04Z-
dc.date.issued2002en_HK
dc.identifier.citationAstronomy And Astrophysics, 2002, v. 389 n. 2, p. 387-392en_HK
dc.identifier.issn0004-6361en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80676-
dc.description.abstractRecent observations show that some dwarf satellite galaxies fall into the gravitational well of the Galaxy while being disrupted by the tidal force. As a consequence, the Galactic halo suffers contamination from this process, the stellar populations of the tidal disrupted satellites make an additional contribution and alter the intrinsic metallicity distribution of the halo stars. The distribution of this kind of disrupted satellite galaxy as a function of metallicity is investigated in this paper. The model is limited to one class of dwarf spherical satellite galaxy, that is assumed to have similar abundance patterns to the Galactic field halo stars. We discuss their distributions through the links between minor merger processes in the history of the Galaxy and the observed distribution of metal-poor field halo stars. The upper limit of 35% of the metal-poor halo field stars was established by merging of this kind of satellite galaxy with characteristic mass M sat, and adopting the mass-metallicity relation among dwarf spheroidal galaxy, the distribution of the disrupted satellite galaxy as a function of metallicity is derived to reproduce the observed metallicity distribution of the extremely metal-poor halo field stars in the Galaxy. The problem of missing metal-free halo stars in the Galaxy is explained in this model as well.en_HK
dc.languageengen_HK
dc.publisherE D P Sciences. The Journal's web site is located at http://www.aanda.orgen_HK
dc.relation.ispartofAstronomy and Astrophysicsen_HK
dc.subjectAbundanceen_HK
dc.subjectEvolutionen_HK
dc.subjectGalaxies: halosen_HK
dc.subjectInteractionsen_HK
dc.titleDistribution of the disrupted satellite galaxies as a function of metallicityen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0004-6361&volume=389&spage=387&epage=392 &date=2002&atitle=Distribution+of+the+disrupted+satellite+galaxies+as+a+function+of+metallicity+en_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0036645192en_HK
dc.identifier.hkuros74834en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036645192&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume389en_HK
dc.identifier.issue2en_HK
dc.identifier.spage387en_HK
dc.identifier.epage392en_HK
dc.publisher.placeFranceen_HK
dc.identifier.scopusauthoridLu, Y=27170078400en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridDeng, LC=36072080400en_HK
dc.identifier.scopusauthoridZheng, XZ=7404091318en_HK

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