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Las supernovas de estrellas masivas son las principales fábricas de polvo
Ben E K Sugerman1, Barbara Ercolano, M J Barlow
1Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA. sugerman@stsci.edu
Science (New York, N.Y.)
|June 10, 2006
Resumen
La formación de polvo en las eyecciones de supernovas se observó en la supernova tipo II 2003gd. Esto sugiere que las estrellas masivas son importantes productores de polvo cósmico.
Área de la Ciencia:
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
- Formación del polvo cósmico.
Sus antecedentes:
- Las supernovas son cruciales para la dispersión de elementos pesados en el medio interestelar.
- La formación de polvo en las eyecciones de supernovas es un proceso clave para el enriquecimiento del universo temprano.
Objetivo del estudio:
- Para investigar la formación de polvo en el eyecto de una supernova de tipo II (SN 2003gd).
- Para cuantificar la cantidad y el momento de la formación de polvo.
- Para evaluar el papel de las supernovas como productores de polvo.
Principales métodos:
- Observaciones ópticas tardías y de infrarrojo medio de SN 2003gd.
- Análisis de excesos en el infrarrojo medio y extinción óptica.
- Aplicación de los modelos de transferencia radiativa.
Principales resultados:
- Se observaron excesos en el infrarrojo medio que indican polvo de enfriamiento en eyecta (499 678 días después de la erupción).
- Aumento de la extinción óptica y las asimetrías del perfil de la línea de emisión.
- Los modelos de transferencia de radiación estimaron hasta 0,02 masas solares de polvo formado ya en los 250 días posteriores al estallido.
Conclusiones:
- La formación de polvo en las eyecciones de supernovas puede ser muy eficiente.
- Las supernovas de estrellas masivas son probablemente los principales contribuyentes a la producción de polvo cósmico a lo largo de la historia cósmica.
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