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La formación y evolución temprana de la galaxia de la Vía Láctea
1Astronomisches Institut der Universität Basel, Venusstrasse 7, CH-4102 Binningen, Switzerland. Roland.Buser@unibas.ch
Science (New York, N.Y.)
|December 30, 1999
Resumen
La Vía Láctea probablemente se formó hace más de 12 mil millones de años a partir de galaxias más pequeñas. Las fusiones de galaxias satélite influyeron en el desarrollo de sus distintos discos gruesos y delgados.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Cosmología Cosmología.
- Evolución galáctica Evolución galáctica.
Sus antecedentes:
- Observaciones recientes sugieren que la formación de la Vía Láctea involucró la acumulación de galaxias más pequeñas.
- El universo primitivo contenía una reserva de gas y estrellas que contribuyeron a la estructura galáctica.
Objetivo del estudio:
- Para aclarar el proceso de formación de la galaxia de la Vía Láctea.
- Para entender el papel de las fusiones de galaxias satélite en la configuración de los componentes galácticos.
Principales métodos:
- Análisis de datos de observación sobre la estructura y composición galáctica.
- Simulaciones cosmológicas que modelan la formación y evolución de las galaxias.
Principales resultados:
- La Vía Láctea probablemente se formó a través de la agregación de galaxias más pequeñas hace más de 12 mil millones de años.
- El momento angular divergente del material primitivo condujo a caminos evolutivos separados para el halo / bulto y el disco.
- Distintos discos gruesos y delgados indican que las fusiones de galaxias satélite en curso influyeron en la evolución temprana.
Conclusiones:
- La estructura de la Vía Láctea es un producto del ensamblaje jerárquico de bloques de construcción primordiales.
- Las fusiones de galaxias satélite jugaron un papel crucial en el establecimiento de los principales componentes estructurales de la Vía Láctea.
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