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dc.contributor.authorKARAALI, S
dc.date.accessioned2021-03-05T14:32:09Z
dc.date.available2021-03-05T14:32:09Z
dc.date.issued1994
dc.identifier.citationKARAALI S., "A NEW METHOD FOR THE DETERMINATION OF THE POPULATION TYPES OF FIELD STARS", ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, cilt.106, ss.107-117, 1994
dc.identifier.issn0365-0138
dc.identifier.othervv_1032021
dc.identifier.otherav_b7a06f8f-8e96-49e7-ac60-77143d743eeb
dc.identifier.urihttp://hdl.handle.net/20.500.12627/122194
dc.description.abstractA method for separation of the field stars into population types by means of their spatial distributions and its application on 1092 stars in SA 57, with galactic coordinates l = 65.5-degrees, b = +85.5-degrees whose proper motions are available is presented. The three-modal distribution of stars with 0.72 less-than-or-equal-to G - R less-than-or-equal-to 1.08 mag (Fig. 1) which is not contaminated by evolved stars enables us to determine the limiting distances z to galactic plane for three populations such as Population I, Intermediate Population II and Population II. The combination of z with the galactic latitude b gives us the limiting distance r to the Sun for these populations; i.e.: r = z sin-1 b. In the present study b = +85.5-degrees hence r is equivalent to z. The limiting distances z (or r) for Population I, Intermediate Population II and Population II are z less-than-or-equal-to 1260, 1260 less-than-or-equal-to z 2885 pc respectively. The limiting distance r and the adopted M(G) absolute magnitude for the colour-index intervals of O.72 less-than-or-equal-to G - R less-than-or-equal-to 1.08, 1.08 < G - R less-than-or-equal-to 1.31, 1.31 < G - R less-than-or-equal-to 1.50 and 1.50 < G - R less-than-or-equal-to 2.00 mag. (Table 1) give us the limiting apparent magnitude for each interval and for each--population (Table 2). The method is confirmed by the distributions of transverse velocities in the direction of galactic rotation relative to the Sun.
dc.language.isoeng
dc.subjectFizik
dc.subjectAstronomi ve Astrofizik
dc.subjectTemel Bilimler
dc.subjectTemel Bilimler (SCI)
dc.subjectUzay bilimi
dc.subjectASTRONOMİ VE ASTROFİZİK
dc.titleA NEW METHOD FOR THE DETERMINATION OF THE POPULATION TYPES OF FIELD STARS
dc.typeMakale
dc.relation.journalASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
dc.contributor.department, ,
dc.identifier.volume106
dc.identifier.issue1
dc.identifier.startpage107
dc.identifier.endpage117
dc.contributor.firstauthorID115322


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