The metallicity distributions in high-latitudes with SDSS

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dc.contributor.authorAk, S.
dc.contributor.authorBilir, S.
dc.contributor.authorKaraali, S.
dc.contributor.authorBuser, R.
dc.contributor.authorCabrera-Lavers, A.
dc.date.accessioned2024-03-13T10:35:07Z
dc.date.available2024-03-13T10:35:07Z
dc.date.issued2007
dc.departmentİstanbul Beykent Üniversitesien_US
dc.description.abstractWe present metallicities and their variations with different parameters for 36 high-latitude fields covering Galactic longitudes < I <= 360 degrees. The metallicities for relatively short vertical distances (z < 2.5 kpc) show systematic fluctuations with Galactic longitude, similar to those of the thick-disc scaleheight, which may be interpreted as indicating a common origin, viz., the flare effect : I the disc (Bilir et al., 2007, MNRAS). This suggestion is supported by the metallicity variations which we find as functions of radial stance. The metallicity variation at larger vertical distances (6.5 < z <= 9.5 kpc) is small but monotonic. Three different vertical metallicity graents could be detected: d[M vertical bar H]dz = - 0.22( +/- 0.03), d[M vertical bar H]vertical bar dz = -0.38( +/- 0.06), and d[M vertical bar H]dz = -0.08(+/- 0.07) dex kpc(-1) for the,tervals z < 3, 3 <=, z < 5, and 5 <=, z < 10 kpc, respectively. Since our data cover the whole Galactic longitude interval, the resulting metlicity gradients can be interpreted as properties of the larger-scale Galaxy. The first gradient confirms the dissipational formation of the sc at short z-distances. The steeper gradient corresponds to the transition region between different population components of the Galcy, and finally, the lowest value provides an adequate description of the inner-halo metallicity gradient. 2007 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.newast.2007.04.005
dc.identifier.endpage612en_US
dc.identifier.issn1384-1076
dc.identifier.issn1384-1092
dc.identifier.issue8en_US
dc.identifier.scopus2-s2.0-34447534252en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage605en_US
dc.identifier.urihttps://doi.org/10.1016/j.newast.2007.04.005
dc.identifier.urihttps://hdl.handle.net/20.500.12662/4244
dc.identifier.volume12en_US
dc.identifier.wosWOS:000248855700001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Bven_US
dc.relation.ispartofNew Astronomyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectgalaxy : abundancesen_US
dc.subjectgalaxy : discen_US
dc.subjectgalaxy : haloen_US
dc.subjectgalaxy : stellar contenten_US
dc.titleThe metallicity distributions in high-latitudes with SDSSen_US
dc.typeArticleen_US

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