The globular cluster systems of the milky way and the Sagittarius dwarf galaxy

Vista sencilla de ítem
dc.contributor.advisorMinniti, D.
dc.contributor.advisorFernández Trincado, Jose Gregorio
dc.contributor.advisorGómez, Matías
dc.contributor.advisorAlonso García, Javier
dc.contributor.advisorRipepi, Vincenzo
dc.contributor.authorGarro, Elisa Rita
dc.contributor.editorFacultad de Ciencias Exactas
dc.date.accessioned2024-10-10T15:46:17Z
dc.date.available2024-10-10T15:46:17Z
dc.date.issued2023
dc.descriptionTesis (Doctora en Astrofísica)
dc.description.abstractThe VISTA Variables in the Via Lactea Survey (VVV) and its Extension (VVVX) allow us to probe ´ previously unexplored regions of the inner Milky Way (MW), especially those that are affected by stellar crowding and strong extinction. My long-term goal is to identify new star clusters and investigate them to reveal their true nature. In particular, I am looking for new candidate globular clusters (GCs) located in the Galactic bulge and disk, with the aim of completing the census of the MW GC system. I searched and characterized new star clusters, using a combination of the near-infrared (IR) VVV-VVVX survey and Two Micron All Sky survey (2MASS) datasets, and the optical Gaia Data Releases (DR2, EDR3 and DR3) photometry and its precise astrometry and proper motions (PMs). Performing a PM-decontamination procedure, I built final catalogues with high-likely cluster members, on which I carried out a detailed photometric analysis. I estimated the main physical parameters, such as reddenings and extinction, heliocentric and Galactocentric distances, mean cluster PMs, metallicities, ages, integrated luminosities, and structural parameters (core and tidal radii). I analysed 34 new GC candidates in the MW and 21 in the Sagittarius dwarf galaxies, confirming (photometrically) the GC nature for 17 of them, and 4 are old open clusters in the MW bulge and disk, whereas other 17 GCs belonging to the Sagittarius dwarf galaxy. Finally, for 11 bound systems, I collected radial velocity informations (from H-/K-band spectra and/or Gaia DR3 datasets) in order to reconstruct their orbital history for the first time, thus associating these clusters to the relative Galactic components and understand their (in-situ or ex-situ) origin.
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/61214
dc.language.isoes
dc.publisherUniversidad Andrés Bello
dc.subjectGalaxias Cúmulos
dc.subjectEstrellas
dc.subjectCúmulos Globulares
dc.subjectGalaxias
dc.subjectFormación
dc.titleThe globular cluster systems of the milky way and the Sagittarius dwarf galaxy
dc.typeTesis
Archivos
Bloque original
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
a146663_Garro_E_The_globular_cluster_systems_of_2023_Tesis.pdf
Tamaño:
76.26 MB
Formato:
Adobe Portable Document Format
Descripción:
TEXTO COMPLETO EN INGLÉS
Descargar
Bloque de licencias
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
license.txt
Tamaño:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descripción:
Descargar
Colecciones
FCE - Trabajos de Titulación Post-Grado