"...ha demostrado cómo la relación entre los cúmulos globulares y la materia oscura depende de la distancia desde el centro del grupo de galaxias".

1. Globular Clusters ... 1.1 Individual Properties... 1.1.1 Size... 1.1.2 Color Magnitude Diagram... 1.1.3 Ages... 1.1.4 Structure and Dynamics... 1.1.5 Stellar Content ... 1.2 Globular Cluster System Properties... 1.2.1 Specific Frequency... 1.2.2 Color Distribution... 1.2.3 Luminosity Function... 1.2.4 Intergalactic Globular Clusters...2 Galaxy Formation and Evolution... 2.1 Light Distribution... 2.1.1 Surface Brightness Profiles... 2.1.2 Luminosity Function... 2.2 Galaxy Content... 2.2.1 Initial Mass Function... 2.2.2 Dark Matter... 2.3 Galaxy Formation Scenarios... 2.3.1 Monolithic Collapse... 2.3.2 Hierarchical Assembly... Globular Clusters: Jewels to Trace the Structure of Galaxies... 2.4 Standard Paradigm... 2.5 This Thesis... 3 Fossil Groups... 3.1 Description.... 3.2 The Sample... 3.2.1 NGC 6482... 3.2.2 NGC 1132... 3.2.3 ESO 306-G017.... 3.3 Observations and Data Reduction... 3.4 Analysis... 3.4.1 Surface Brightness... 3.4.2 GC Detection... 3.5 Results... 3.5.1 Globular Cluster Color Distribution... 3.5.2 Globular Cluster Spatial Distribution... 3.5.3 Globular Cluster Luminosity Function... 3.5.4 Specific Frequency... 3.6 Discussion... 3.6.1 Comparison with Cluster Ellipticals... 3.6.2 Comparisons with X-ray Data... 4 Abell 1689... 4.1 Description... 4.2 Observations and Data Reduction... 4.3 Analysis... 4.3.1 Galaxy Modeling... 4.3.2 Object Detection... 4.3.3 GC Candidate Selection... 4.3.4 Completeness... 4.3.5 Background Contamination... 4.4 Results and Discussion... 4.4.1 Total GC Number and Specific Frequency...4.4.2 Comparison of Mass Profiles...4.5 Modeling of Individual Galaxies...5 Conclusions...5.1 Fossil Groups... 5.2 Abell 1689... Bibliography.