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Gigantescas estructuras de radio en forma de anillo alrededor del cúmulo de galaxias Abell 337676
Joydeep Bagchi1, Florence Durret, Gastão B Lima Neto
1Inter-University Centre for Astronomy and Astrophysics (IUCAA), Post Bag 4, Ganeshkhind, Pune University Campus, Pune 411007, India. joydeep@iucaa.ernet.in
Science (New York, N.Y.)
|November 4, 2006
Resumen
Las gigantescas estructuras de radio observadas cerca de Abell 3376 pueden revelar ondas de choque cósmicas. Estas poderosas sacudidas podrían estar acelerando las partículas de rayos cósmicos a energías extremadamente altas.
Área de la Ciencia:
- Cosmología Cosmología.
- La astrofísica es la astrofísica.
- La radioastronomía es una radioastronomía.
Sus antecedentes:
- Las estructuras a gran escala se ensamblan a través de agrupaciones jerárquicas en la cosmología fría de la materia oscura.
- Las ondas de choque cósmicas en los flujos de materia intergaláctica supersónicos son cruciales para la formación de estructuras.
- Estas ondas de choque ocurren en escalas de megaparsec (Mpc), impactando en cúmulos de galaxias, filamentos y panqueques.
Objetivo del estudio:
- Para investigar la naturaleza de las gigantescas estructuras emisoras de radio no térmicas en forma de anillo observadas en las afueras del cúmulo de galaxias Abell 3376.
- Para determinar si estas estructuras son evidencia de ondas de choque de flujo de materia a gran escala cosmológica.
- Para explorar el potencial de estas estructuras como sitios para la aceleración de rayos cósmicos.
Principales métodos:
- Utilizó el telescopio Very Large Array (VLA) para las observaciones.
- El gigante analizado (aproximadamente 2 Mpc por 1.6 Mpc) en forma de anillo no térmico estructuras emisoras de radio.
- Observaciones interpretadas en el marco de la cosmología de la materia oscura fría y los flujos intergalácticos supersónicos.
Principales resultados:
- Se han descubierto estructuras de radio no térmicas gigantes en forma de anillo cerca de Abell 3376.6.
- Estas estructuras tienen aproximadamente 2 Mpc por 1.6 Mpc de tamaño.
- Las estructuras observadas están potencialmente vinculadas a ondas de choque en flujos de materia cosmológica a gran escala.
Conclusiones:
- Las estructuras de radio observadas pueden representar elusivas ondas de choque cósmicas de flujos de materia a gran escala.
- Estas ondas de choque poseen suficiente energía para alimentar la emisión de radio observada.
- Las estructuras podrían ser sitios donde los choques magnéticos aceleran las partículas de rayos cósmicos a energías de 1018 a 1019 electronvoltios.
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