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Herschel detecta un depósito masivo de polvo en la supernova 1987A

M Matsuura¹, E Dwek, M Meixner

¹Astrophysics Group, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK. mikako@star.ucl.ac.uk

Science (New York, N.Y.)

|July 9, 2011

Resumen

Las observaciones de la supernova 1987A revelan la formación de polvo frío dentro de las eyecciones de supernovas. Este hallazgo sugiere que las supernovas son fuentes significativas de polvo, cruciales para comprender la evolución temprana de las galaxias.

Área de la Ciencia:

La astronomía y la astrofísica.
Estudios del polvo cósmico Estudios del polvo cósmico

Sus antecedentes:

Supernova 1987A es una explosión estelar bien estudiada en la Gran Nube de Magallanes.
La formación y evolución del polvo en el universo son fundamentales para comprender la formación y evolución de las galaxias.

Objetivo del estudio:

Investigar la presencia y las propiedades del polvo frío en el eyecto de la Supernova 1987A.
Para determinar la masa de polvo y la temperatura utilizando observaciones de infrarrojo lejano y submilimétrico.

Principales métodos:

Se realizaron observaciones en infrarrojo lejano y submilimétrico de la Supernova 1987A.
Analizó la intensidad y la distribución de energía espectral de la radiación emitida.

Principales resultados:

Se detectó una población de granos de polvo frío (17-23 Kelvin) que irradiaban a aproximadamente 220 luminosidades solares.
Se estima una masa de polvo de 0,4 a 0,7 masas solares originadas por la eyección de supernova.
Precipitación eficiente implícita de material refractario en polvo dentro del eyecto.

Conclusiones:

Las supernovas pueden producir eficientemente cantidades sustanciales de polvo.
Estas capacidades de producción de polvo de las supernovas son vitales para la siembra de galaxias jóvenes con polvo a altos desplazamientos al rojo.
Los hallazgos contribuyen a la comprensión del ciclo del polvo cósmico y las condiciones del universo temprano.

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