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Un origen de supernova para el polvo en un cuásar de alto desplazamiento al rojo.
R Maiolino1, R Schneider, E Oliva
1INAF-Osservatorio Astrofisico di Arcetri, Firenze, Italy. maiolino@arcetri.astro.it
Nature
|October 1, 2004
Resumen
Las supernovas, no las estrellas evolucionadas, probablemente formaron polvo interestelar en el Universo temprano. Las observaciones infrarrojas de un cuásar de alto desplazamiento al rojo apoyan esta teoría del origen del polvo de supernova.
Área de la Ciencia:
- La formación de polvo cósmico.
- El Universo Temprano Astrofísica del Universo Temprano
- Evolución de los cuásares en evolución.
Sus antecedentes:
- El polvo interestelar es vital para la formación molecular y estelar, y reemite luz absorbida.
- Tradicionalmente se cree que el polvo se forma en estrellas evolucionadas de baja masa.
- Los recientes descubrimientos de polvo en los primeros cuásares desafían este origen.
Objetivo del estudio:
- Investigar el origen del polvo en el Universo temprano.
- Prueba la hipótesis de que las supernovas producen el primer polvo cósmico.
Principales métodos:
- Observaciones infrarrojas de un cuásar con desplazamiento al rojo 6.2.2.
- Determine directamente la curva de extinción del polvo del cuásar.
- Compare la curva de extinción observada con los modelos teóricos de polvo de supernova.
Principales resultados:
- La curva de extinción del polvo del cuásar de alto desplazamiento al rojo coincide estrechamente con los modelos de polvo de supernova.
- Este acuerdo proporciona evidencia directa de la formación de polvo a través de las supernovas.
Conclusiones:
- Las supernovas son una fuente probable de polvo interestelar en los quásares de alto desplazamiento al rojo.
- La mayor parte del polvo en el Universo temprano probablemente se origina en las supernovas.
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