Resolved stellar populations in milky way and andromeda's new satellites

Garofalo, Alessia (2013) Resolved stellar populations in milky way and andromeda's new satellites. [Laurea magistrale], Università di Bologna, Corso di Studio in Astrofisica e cosmologia [LM-DM270], Documento ad accesso riservato.
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This thesis concerns the study of the variable stars and resolved stellar populations in four recently discovered dSphs, namely, Hercules and Ursa Major I (UMa I), which are UFD satellites of the MW; Andromeda XIX (And XIX) and Andromeda XXI (And XXI), which are satellites of M31. The main aim is to obtain detailed informations on the properties (age, metallicity, distance, and Oosterhoff type) of the stellar populations in these galaxies, to compare them with those of other satellites around the MW and M31, both ''classical'' dSphs and UFDs. The observables used to achieve these goals are the pulsating variables, especially the RR Lyrae stars, and the color magnitude diagram (CMD) of the resolved stellar populations. In particular, for UMa I, we combined B, V time-series observations from four different ground-based telescopes (Cassini, TLS, TT1 and Subaru) and for Hercules, we used archival data acquired with the Advanced Camera for Surveys (ACS) on board the HST. We used, instead B and V times-series photometry obtained with the Large Binocular Telescope (LBT) for And XIX and And XXI .

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Garofalo, Alessia
Relatore della tesi
Corso di studio
Ordinamento Cds
Parole chiave
Popolazioni stellari risolte-galassie nane sferoidali-stelle variabili
Data di discussione della Tesi
13 Dicembre 2013

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