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Un anillo molecular de Einstein: imágenes de un disco de explosión estelar que rodea un objeto cuasi estelar
C L Carilli1, G F Lewis, S G Djorgovski
1National Radio Astronomy Observatory, Post Office Box O, Socorro, NM 87801, USA.
Science (New York, N.Y.)
|April 5, 2003
Resumen
Las observaciones de un cuásar con lente gravitacional (QSO, por sus siglas en inglés) revelan una galaxia masiva de explosión estelar en rápida formación. Este descubrimiento apoya las teorías de la formación simultánea de agujeros negros y estrellas en las primeras galaxias.
Área de la Ciencia:
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
- Cosmología Cosmología.
Sus antecedentes:
- Los objetos casi estelares (QSOs) con altos desplazamientos al rojo son cruciales para comprender la evolución de las galaxias.
- La lente gravitacional proporciona una oportunidad única para estudiar objetos distantes y débiles.
Objetivo del estudio:
- Para investigar la galaxia anfitriona de la lente de alto desplazamiento al rojo QSO PSS J2322+1944.4.
- Caracterizar la actividad de formación estelar y la estructura de la galaxia anfitriona.
Principales métodos:
- Observaciones utilizadas de la emisión de línea 2-1 de monóxido de carbono (CO) molecular y la emisión de radio continuo.
- Modelado las emisiones observadas para inferir las propiedades físicas de la galaxia anfitriona.
Principales resultados:
- Reveló una estructura de anillos de Einstein con un diámetro de 1,5", lo que indica un sistema de lentes gravitacionales.
- Modelado la galaxia anfitriona como un disco de formación estelar con un radio de 2 kiloparsecs.
- Lo que implica una tasa de formación estelar masiva de 900 masas solares por año.
Conclusiones:
- La tasa de formación de estrellas masivas observada sugiere que una fracción significativa de estrellas en una gran galaxia elíptica puede formarse en 10^8 años.
- La formación estelar activa en la galaxia anfitriona del QSO apoya la formación contemporánea de agujeros negros supermasivos y estrellas.
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