Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/3295
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dc.contributor.authorSagar, R-
dc.contributor.authorCannon, R. D-
dc.date.accessioned2008-09-01T09:47:39Z-
dc.date.available2008-09-01T09:47:39Z-
dc.date.issued1997-04-
dc.identifier.citationAstronomy and Astrophysics Supplement Series, Vol. 122, No. 1, pp. 9 - 29en
dc.identifier.issn0365-0138-
dc.identifier.urihttp://hdl.handle.net/2248/3295-
dc.description.abstractCCD observations in the U, B, V, R and I passbands have been used to generate colour-colour and deep colour-magnitude diagrams for the young open star clusters NGC 3228, NGC 4103, NGC 5662 and NGC 6087. The sample consists of about 2000 stars reaching down to V = 20 mag. The interstellar extinction across the face of the imaged cluster regions seems to be uniform with average values of E(B-V) = 0.31, 0.34 and 0.22 mag for NGC 4103, NGC 5662 and NGC 6087 respectively. The distances to the clusters NGC 3228, NGC 4103, NGC 5662 and NGC 6087 have been estimated as 0.5 +/- 0.05, 2.0 +/- 0.3, 0.8 +/- 0.1 and 1.0 +/- 0.1 kpc respectively, while the corresponding ages estimated from the theoretical stellar evolutionary isochrones fitted to the bright proper motion cluster members are ~ 100, 30, 80 and 65 Myr respectively. Present data are consistent with the membership of the Cepheid variable V Cen to NGC 5662 and of S Norm to NGC 6087. Heavy contamination by foreground and background field stars has unfortunately made it impossible to reach definite conclusions about the faint luminosity function, and the data do not reach faint enough limits to investigate pre-main sequence stars. Tables 6 to 9 only available in electronic form at CDS.en
dc.language.isoenen
dc.publisherEDP Sciencesen
dc.relation.urihttp://dx.doi.org/10.1051/aas:1997293en
dc.subjectHR Diagramen
dc.subjectStars: Evolutionen
dc.subjectOpen Clusters And Associations: Individual: NGC 3228en
dc.subjectNGC 4103en
dc.subjectNGC 5662en
dc.subjectNGC 6087en
dc.titleMulticolour deep CCD photometric study of the moderately young southern open star clusters NGC 3228, NGC 4103, NGC 5662 and NGC 6087en
dc.typeArticleen
Appears in Collections:IIAP Publications



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