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Sistemas peculiares de galaxias :

Authors: Díaz Gimenez, María Eugenia;

Sistemas peculiares de galaxias :

Abstract

Se presenta un estudio estadístico sobre grupos compactos y fósiles identificados en simulaciones numéricas combinadas con diferentes modelos semianalíticos de formación de galaxias. Los resultados fueron también confrontados con datos observacionales. Se determinó que sólo la mitad de los grupos compactos identificados automáticamente con 4 velocidades concordantes son sistemas fìsicamente densos. La identificación puede ser optimizada si se modifican los criterios originales de identificación considerando que los grupos reales presentan brillos superficiales más altos, cocientes tasa-luminosidad y tiempos de cruce más bajos, y radios proyectados más chicos. Por otro lado, se determinó que las galaxias centrales de grupos fósiles se han ensamblado más tarde y sufrido fusiones por tiempos superiores que las galaxias centrales de grupos normales. El análisis del entorno de los grupos fósiles indica que, en épocas tempranas, estos sistemas se encontraban en zonas de baja densidad y rodeados por subestructuras sobredensas, lo que podría explicar su temprana época de formación.

Tesis (Doctor en Astronomía)--Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física, 2009.

Country
Argentina
Keywords

Galaxy groups, large scale structure of the Universe, Galaxy mergers, collisions and tidal interactions, computer modeling and simulation, Mathematical Procedures and Computer Techniques, 330, Galaxy mergers, Técnicas de reducción y observación de datos, Cúmulos y supercúmulos de galaxias, Grupos pequeños y compactos de galaxias, collisions and tidal interactions, clusters and superclusters, Estructura a gran escala del universo, Observation and data reduction techniques, Procedimientos matemáticos y técnicas informáticas, Estructura a gran escala del Universo, Small and compact galaxy groups, Galaxy groups, clusters and superclusters; large scale structure of the Universe, Observation and data reduction techniques; computer modeling and simulation, Fusiones de galaxias

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green