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|Title: ||Stellar populations in the Carina dSph galaxy and in the globular cluster Omega Centauri|
|Authors: ||Buonanno, Roberto|
|Keywords: ||Local Group|
|Issue Date: ||23-Feb-2006 |
Dwarf spheroidal galaxies (dSphs) in the Local Group are fundamental laboratories to constrain not only cosmological theories concerning the so-called hierarchical paradigm, but also to trace back in time the star formation history and the chemical enrichment of these systems.
dSph are good candidate to be the building blocks needed to assemble big galaxies in the hierarchical scenario. The high Mass-to-Light (M/L) ratio estimated seem to indicate that they are Dark Matter dominated. However, photometric survey have brought the evidence of the presence of extra-tidal stars around these objects. This could be the signature of tidal interaction between dSphs and the Galaxy, and may explain the high M/L estimated.
The study of stellar populations of these nearby objects may help us
to understand the nature of these elusive galaxies, and how they interact with the Galaxy. We present in this thesis the result of a photometric campaign aimed at studying the stellar content ...|
|Appears in Collections:||Tesi di dottorato in scienze matematiche e fisiche|
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