Corrientes Estelares de Marea en el Universo Local
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2026
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25/02/2025
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Universidad Complutense de Madrid
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Abstract
De acuerdo con el marco establecido para la evolución de las galaxias, estas crecen mediante fusiones con otras galaxias. Las corrientes estelares de marea tienen su origen en la interacción entre una galaxia central y un sistema de menor masa, tal como una galaxia satélite o un cúmulo globular, llegando a producirse lo que se conoce como una fusión menor. El modelo cosmológico ΛCDM predice que los halos de las galaxias masivas son ricos en restos de tales fusiones. En el Grupo Local, se han identificado muchas subestructuras difusas y establecido su conexión con la evolución de las galaxias. Sin embargo, el Grupo Local no constituye una muestra estadísticamente significativa de corrientes estelares de marea. Porlo tanto, se requiere el análisis de una muestra mayor, mas allá del Grupo Local, para poder estimar la frecuencia y características de esas corrientes y poder verificar si sus propiedades están de acuerdo con las predicciones del modelo ΛCDM...
According to the well established hierarchical framework for galaxy evolution, galaxies grow through mergers with other galaxies. Stellar tidal streams originate from tidal interactions between a central galaxy and lower-mass systems such as satellite galaxies or globular clusters, leading to a so-called minor merger. The ΛCDM cosmological model predicts that the stellar halos of massive galaxies are rich in remnants from such mergers. For the Local Group, many diffuse substructures have been identified and their link to galaxy evolution has been traced. However, the Local Group does not offer a statistically significant sample of stellar tidal streams. Thus, an analysis of a larger sample beyond the Local Group is required to better probe the frequency and characteristics of these streams to verify whether these properties are in agreement with the predictions of the ΛCDM model...
According to the well established hierarchical framework for galaxy evolution, galaxies grow through mergers with other galaxies. Stellar tidal streams originate from tidal interactions between a central galaxy and lower-mass systems such as satellite galaxies or globular clusters, leading to a so-called minor merger. The ΛCDM cosmological model predicts that the stellar halos of massive galaxies are rich in remnants from such mergers. For the Local Group, many diffuse substructures have been identified and their link to galaxy evolution has been traced. However, the Local Group does not offer a statistically significant sample of stellar tidal streams. Thus, an analysis of a larger sample beyond the Local Group is required to better probe the frequency and characteristics of these streams to verify whether these properties are in agreement with the predictions of the ΛCDM model...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, leída el 26/02/2025













