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- W24739189 abstract "The aim of this thesis is to study the stellar populations of Galactic open and globular clusters throughhigh-precision, high-accuracy wide-field astrometry (∼ 1 mas) and photometry (∼ 0.01 mag). This thesis is organized into three parts.- The first part introduces the benefits and advantages of the wide field in astrometry, and describes in detail the method we have developed to obtain high-precision photometric and astrometric mea- surements.- The second part discusses the achieved scientific results. The method is applied mainly on three telescope/camera systems (LBC@LBT, WFI@2.2m, WFC3/UVIS@HST), with which two stellar systems were observed: the open cluster M 67 and the globular cluster ω Cen. Thanks to proper- motion measurements, it was possible to disentangle, in both cases, cluster members from field objects in the foreground and in the background. This allowed us to undertake several projects, among which is the study of the end of the white dwarf cooling sequence in M 67 and the mea- surement of its absolute proper motion using as reference background galaxies, the analysis of the ω Cen multiple stellar populations and their relative radial distribution.- The last part presents the projects for the forthcoming future: absolute proper motions of globular clusters, tidal tails analysis and application of our methods to other wide-field imagers, such as HAWK-I@VLT and VISTA, in which our group is deeply involved in the VVV survey (2000 hours of observation already allocated)." @default.
- W24739189 created "2016-06-24" @default.
- W24739189 creator A5091151551 @default.
- W24739189 date "2010-07-19" @default.
- W24739189 modified "2023-09-24" @default.
- W24739189 title "High-precision astrometry and photometry of star clusters from HST and ground-based telescopes" @default.
- W24739189 hasPublicationYear "2010" @default.
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