Browsing by Author "Astudillo Sotomayor, Pablo"
Now showing 1 - 1 of 1
Results Per Page
Sort Options
Item The origins of ultra diffuse galaxies: characterization of their globular cluster population.(Universidad de Concepción, 2025) Astudillo Sotomayor, Pablo; Leigh, Nathan W. C.; Demarco López, Ricardo JavierWe present our analysis of the globular cluster (GC) systems in six ultra diffuse galaxies (UDG) living in different environments, with the over-arching goal to understand the origins of UDGs. We study how dynamical processes may have shaped the GC luminosity functions (GCLFs) and their spatial distributions. We begin by fitting gaussian and skew-gaussian profiles to the GCLFs in arder to evaluate if they are different from normal dwarf galaxies, for which a Gaussian profile typically matches the data. We retrieve the spatial distribution of GCs and use photometric observables to model the density, enclosed mass and velocity dispersion profiles. We then compute dynamical friction and disruption timescales for GCs in each UDG. We analyze how dynamical friction (DF) and disruption may have shaped the GCLFs and spatial distributions. DF would preferentially make the high-mass end of the GCLF sink into the center, potentially forming a nuclear star cluster anda skew Gaussian GCLF (positively skewed) profile that is depleted at the high-mass end. Disruption, on the other hand, would likely affect those GCs at the low-mass end of the GCLF, establishing a lower limit for GC mass and a negatively skew gaussian. Our results are consistent with observable trends of GC systems in UDGs, such as the distribution of Galactocentric radii, where R9c/Re < 1, and a narrower GCLF. Finally we are a ble to constrain formation scenarios consistent with our estimated timescales and the lack of nuclear star clusters, even in those galaxies with DF timescales shorter than a Hubble time.