Estimation of Galactic model parameters in high latitudes with SDSS

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dc.contributor.authorBilir, S.
dc.contributor.authorCabrera-Lavers, A.
dc.contributor.authorKaraali, S.
dc.contributor.authorAk, S.
dc.contributor.authorYaz, E.
dc.contributor.authorLopez-Corredoira, M.
dc.date.accessioned2024-03-13T10:35:19Z
dc.date.available2024-03-13T10:35:19Z
dc.date.issued2008
dc.departmentİstanbul Beykent Üniversitesien_US
dc.description.abstractWe estimated the Galactic model parameters for a set of 36 high-latitude fields included in the currently available Data Release 5 (DR 5) of the Sloan Digital Sky Survey (SDSS), to explore their possible variation with the Galactic longitude. The thick disc scaleheight moves from similar to 550 pc at 120< l < 150 degrees to similar to 720 pc at 250 < l < 290 degrees, while the thin disc scaleheight is as large as similar to 195 pc in the anticenter direction and similar to 15% lower at vertical bar l vertical bar < 30 degrees. Finally, the axis ratio (c/a) of the halo changes from a mean value of similar to 0.55 in the two first quadrants of the Galaxy to similar to 0.70 at 190 < l < 300 degrees. For the halo, the reason for the dependence of the model parameters on the Galactic longitude arises from the well known asymmetric structure of this component. However, the variation of the model parameters of the thin and thick discs with Galactic longitude originates from the gravitational effect of the Galactic long bar. Moreover, the excess of stars in quadrant I (quadrant III) over quadrant IV (quadrant II) is in agreement with this scenario.en_US
dc.identifier.doi10.1071/AS07026
dc.identifier.endpage84en_US
dc.identifier.issn1323-3580
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-46349091984en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage69en_US
dc.identifier.urihttps://doi.org/10.1071/AS07026
dc.identifier.urihttps://hdl.handle.net/20.500.12662/4359
dc.identifier.volume25en_US
dc.identifier.wosWOS:000257107000003en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherCsiro Publishingen_US
dc.relation.ispartofPublications Of The Astronomical Society Of Australiaen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectGalaxy : discen_US
dc.subjectGalaxy : structureen_US
dc.subjectGalaxy : fundamental parametersen_US
dc.titleEstimation of Galactic model parameters in high latitudes with SDSSen_US
dc.typeArticleen_US

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