Galactic longitude dependent galactic model parameters

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dc.contributor.authorBilir, S.
dc.contributor.authorKaraali, S.
dc.contributor.authorAk, S.
dc.contributor.authorYaz, E.
dc.contributor.authorHamzaoglu, E.
dc.date.accessioned2024-03-13T10:35:07Z
dc.date.available2024-03-13T10:35:07Z
dc.date.issued2006
dc.departmentİstanbul Beykent Üniversitesien_US
dc.description.abstractWe present the Galactic model parameters for thin disc estimated by Sloan Digital Sky Survey (SDSS) data of 14 940 stars with apparent magnitudes 16 < g(o) <= 21 in six intermediate latitude fields in the first Galactic quadrant. Star/galaxy separation was performed by using the SDSS photometric pipeline and the isodensity contours in the (g - r)(o) - (r - i)(o) two colour diagram. The separation of thin disc stars is carried out by the bimodal distribution of stars in the (g - r)o histogram, and the absolute magnitudes were evaluated by a procedure presented in the literature (Bilir, S., Karaali, S., Tuncel, S. 2005. AN 326, 321). Exponential density law fits better to the derived density functions for the absolute magnitude intervals 8 < M(g) <= 9 and 11 < M(g) <= 12, whereas sech/sech(2) laws are more appropriate for absolute magnitude intervals 9 < M(g) <= 10 and 10 < M(g) <= 11. We showed that the scaleheight and scatelength are Galactic longitude dependent. The average values and ranges of the scaleheight and the scalelength are < H > = 220 pc (196 <= H <= 234 pc) and < H > = 1900 pc (1561 <= h <= 2280 pc) respectively. This result would be useful to explain different numerical values claimed for those parameters obtained by different authors for the fields in different directions of the Galaxy. (c) 2006 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.newast.2006.10.001
dc.identifier.endpage245en_US
dc.identifier.issn1384-1076
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-33751240102en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage234en_US
dc.identifier.urihttps://doi.org/10.1016/j.newast.2006.10.001
dc.identifier.urihttps://hdl.handle.net/20.500.12662/4243
dc.identifier.volume12en_US
dc.identifier.wosWOS:000243175900009en_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 : disken_US
dc.subjectgalaxy : fundamental parametersen_US
dc.subjectgalaxy : structureen_US
dc.subjectstars : luminosity functionen_US
dc.subjectmass functionen_US
dc.titleGalactic longitude dependent galactic model parametersen_US
dc.typeArticleen_US

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