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Estructura de lanzamiento de chorros resuelta cerca del agujero negro supermasivo en M87
Sheperd S Doeleman1, Vincent L Fish, David E Schenck
1MIT Haystack Observatory, Off Route 40, Westford, MA 01886, USA. sdoeleman@haystack.mit.edu
Science (New York, N.Y.)
|September 29, 2012
Resumen
Los investigadores observaron la base del chorro relativista de M87 utilizando interferometría de radio. El pequeño tamaño del chorro sugiere que está alimentado por un disco de acreción progresiva que orbita un agujero negro giratorio, no uno retrógrado.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- La radioastronomía es una radioastronomía.
- Física del agujero negro Física del agujero negro
Sus antecedentes:
- Los núcleos galácticos activos (AGN) a menudo presentan chorros relativistas impulsados por la acreción de agujeros negros supermasivos.
- Los perfiles de ancho de chorro observados en escalas grandes se alinean con las teorías de colimación magnética.
- La estructura del chorro en el punto de lanzamiento, cerca del disco de acreción, permanece sin ser detectada.
Objetivo del estudio:
- Para resolver espacialmente la base del chorro relativista en el núcleo galáctico activo M87.7.
- Para investigar la dinámica del disco de acreción responsable del lanzamiento del jet.
- Para probar modelos de formación de chorros y fuentes de energía.
Principales métodos:
- Utilizó observaciones de interferometría de radio de alta resolución en una longitud de onda de 1,3 milímetros.
- Centrada en la galaxia elíptica M87, conocida por su prominente chorro relativista.
- Analizó la emisión de radio para determinar el tamaño y la estructura de la base del chorro.
Principales resultados:
- Resolvió espacialmente la base del jet M87.
- Determinó que el tamaño de la base del chorro es de 5.5 ± 0.4 radios de Schwarzschild.
- Este tamaño es menor que el borde interno de un disco de acreción retrógrado.
Conclusiones:
- El chorro M87 es probablemente alimentado por un disco de acreción en una órbita progresiva.
- Sugiere que un agujero negro giratorio está involucrado en el lanzamiento del jet.
- Desafía a los modelos que se basan en discos de acreción retrógrada para la potencia del jet.
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