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<dc:title xml:lang="en">Finding and characterising the darkest galaxies in the local Group with the Pan-STARRS 1 survey</dc:title>
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<dc:subject xml:lang="fr">Matière noire</dc:subject>
<dc:subject xml:lang="en">Milky Way</dc:subject>
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<dcterms:abstract xml:lang="fr">Cette thèse utilise le relevé de donné du Panoramic Survey Telescope and Rapid Response System 1 Survey pour trouver de nouveaux satellites du Groupe Local: les galaxies naines et les amas globulaires. Le relevé est important pour résoudre les tensions entre les observations et les modèles. Premièrement, un algorithme de détection est développé, découvrant cinq nouveaux satellites. Bien que cinq découvertes soient faites, le nombre de découvertes est inférieur à ce qu’on s’attendrait, en présumant une distribution isotrope de galaxies naines. Ce résultat mène au deuxième objectif de la these: quantifier les limites de détections du relevé PS1. Les cartes d’efficacité de détection du ciel complet peuvent être utilisées pour quantifier la distribution (an)isotrope des galaxies satellites de la Voie Lactée. En outre, ces informations peuvent mener a redériver la fonction de luminosité des satellites.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This thesis uses the Panoramic Survey Telescope and Rapid Response System 1 Survey to find new Local Group satellites such as dwarf galaxies and globular clusters. This survey is instrumental in helping resolve tensions that have become apparent between observation and theories. In a first phase, a search algorithm is developed, discovering five new satellites. Though yielding five discoveries, this number is lower than one would expect, assuming isotropy of the dwarf galaxies. This leads to the second aim of this thesis, namely quantifying the detection limits of the PS1 Survey. The detection efficiency maps over the entire PS1 sky can be used as a stepping–stone towards the quantification of the (an)isotropy of the Milky Way satellites’ distribution. Using this information, the luminosity function of these satellites can be re–derived.</dcterms:abstract>
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