منابع مشابه
CCD BV survey of 42 open clusters
Aims. We present results of a photometric survey whose aim was to derive structural and astrophysical parameters for 42 open clusters. While our sample is definitively not representative of the total open cluster sample in the Galaxy, it does cover a wide range of cluster parameters and is uniform enough to allow for simple statistical considerations. Methods. BV wide-field CCD photometry was o...
متن کاملAsteroseismology of δ Scuti stars in open clusters: Praesepe
The present paper provides a general overview of the asteroseismic potential of δ Scuti stars in clusters, in particular focusing on convection diagnostics. We give a summarise of the last results obtained by the authors for the Praesepe cluster of which five δ Scuti stars are analysed. In that work, linear analysis is confronted with observations, using refined descriptions for the effects of ...
متن کاملCcd Photometry of Distant Open Clusters: Ii { Ngc 6791
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...
متن کاملWide Field CCD photometry around nine open clusters
In this paper we study the evolution of core and corona of nine open clusters using the projected radial density profiles derived from homogeneous CCD photometric data obtained through the 105-cm Kiso Schmidt telescope. The age and galactocentric distance of the target clusters varies from 16 Myr to 2000 Myr and 9 kpc to 10.8 kpc respectively. Barring Be 62, which is young open cluster, other c...
متن کاملA deep UBV RI CCD photometric study of the open clusters Tr 1 and Be 11
We present deep UBV RI CCD photometry for the young open star clusters Tr 1 and Be 11. The CCD data for Be 11 is obtained for the first time. The sample consists of ∼ 1500 stars reaching down to V ∼ 21 mag. Analysis of the radial distribution of stellar surface density indicates that radius values for Tr 1 and Be 11 are 2.3 and 1.5 pc respectively. The interstellar extinction across the face of...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1993
ISSN: 0252-9211
DOI: 10.1017/s0252921100018790