Deep and wide photometry of the two open clusters NGC 1245 and NGC 2506: CCD observation and physical properties
نویسندگان
چکیده
منابع مشابه
CCD photometry of two old open clusters NGC 1798 and NGC 2192
We present UBV I CCD photometry of two open clusters NGC 1798 and NGC 2192 which were little studied before. Color-magnitude diagrams of these clusters show several features typical for old open clusters: a well-defined main-sequence, a red giant clump, and a small number of red giants. The main sequence of NGC 1798 shows a distinct gap at V ≈ 16.2 mag. From the surface number density distribut...
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UBGVRI photometry for the open cluster NGC 2506 is presented. From comparison of the observed colour-magnitude diagrams with simulations based on stellar evolutionary models we derive in a self consistent way reddening, distance, and age of the cluster: E(B−V)=0-0.07, (m-M)0 = 12.6±0.1, τ = 1.5-2.2 Gyr. The cluster shows a well definite secondary sequence, suggesting that binary systems constit...
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Three new photometric CCD-based datasets are presented for NGC 6791. They consist of deep UBV photometry (to V lim = 24, B lim = 24, U lim = 23) of the central parts of the cluster and of selected elds around it, and of relatively shallower UBVI photometry for the whole cluster (23 0 23 0). The data have been used to discuss the reddening, metallicity and age of NGC 6791, a cluster which is par...
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We present UBVRI photometry for the old open cluster NGC 6253. From comparison of the observed colour-magnitude diagrams with simulations based on stellar evolutionary models we derive in a self consistent way reddening, distance, and age of the cluster: E(B−V)= 0.23–0.32, (m-M)0 = 10.9±0.1, metallicity roughly double than solar, and age ≃ 3 Gyr. The cluster has a binary sequence, discernible e...
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We present a new CCD photometry for the young LMC cluster NGC 2172, giving B, V, I magnitudes for more than 600 stars within 70 ′′ from the cluster center, down to approximatelyV = 21 mag. After correction for completeness and field stars contamination, we discuss the cluster HR diagram and the MS luminosity function in the light of current evolutionary theories and in connection with the probl...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2012
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2012.21593.x