Date/heure
23 mai 2019
10:45 - 11:45
Oratrice ou orateur
Radu Dan Capitan
Catégorie d'évènement Séminaire Probabilités et Statistique
Résumé
Spatial modeling in Astronomy can benefit from visualization techniques and spatial manipulation using Geographic Information Systems (G.I.S.) techniques. Preliminary analysis of stellar population characteristics in M83 galaxy using the emitted radiation source in different wavelengths shows a spatial aggregation model of stellar populations and clusters that are hierarchically organized in proximity of galaxy’s spiral arms. A review on stellar population and cluster characteristics (Krumholz et al., 2018) shows that their definition and organization characteristics vary on orders of several magnitudes, therefore the need to analyze clustering models using several mathematical models as well as G.I.S. clusters tools are foreseen here (a set of weighted features, identifies statistically significant hot spots, cold spots, and spatial outliers using the Anselin Local Moran’s I statistic). We aim to check if the clustering is related to a theoretical model (the density wave theory), where local to regional organization of stellar populations that belong to main sequence can form the hierarchically organized structures along the M83 galaxy’s spiral arms.