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La galaxia central en abell 2029: una vieja supergigante
Science (New York, N.Y.)
|October 26, 1990
Resumen
Las galaxias gigantes cD, como la de Abell 2029, poseen enormes halos lisos que se extienden sobre un megaparsec. Esta estructura sugiere una formación temprana dentro de los ricos cúmulos de galaxias.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Evolución de la galaxia Evolución de la galaxia.
- Estructuras cósmicas Estructuras cósmicas
Sus antecedentes:
- Las galaxias cD son galaxias elípticas masivas que se encuentran en los centros de los cúmulos de galaxias.
- Los cúmulos de galaxias, como Abell 2029, proporcionan entornos para estudiar la formación y evolución de las galaxias.
- Comprender la extensión y las propiedades de los halos de galaxias es crucial para los modelos cosmológicos.
Objetivo del estudio:
- Para investigar la estructura extendida de la galaxia cD en el cúmulo de galaxias Abell 2029.
- Para determinar el tamaño y la luminosidad del halo de la galaxia cD.
- Para inferir la historia de formación de la galaxia cD basada en sus propiedades de halo.
Principales métodos:
- Análisis de un mosaico de imágenes del cúmulo de galaxias Abell 2029.
- Corrección para la luz dispersa de las estrellas y las galaxias de fondo.
- Rastreando las débiles regiones externas del halo de la galaxia cD.
Principales resultados:
- El halo de la galaxia cD fue rastreado a una distancia superior a 1 megaparsec.
- La galaxia se identifica como una de las galaxias más grandes y luminosas conocidas.
- El halo exhibe una morfología suave.
Conclusiones:
- El halo extendido y liso indica la formación temprana de la galaxia cD dentro del cúmulo.
- Los hallazgos contribuyen a nuestra comprensión de la formación de galaxias masivas en entornos densos.
- Este estudio pone de relieve la escala y la luminosidad de las galaxias gigantes cD.
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