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Las supernovas. Antigua fábrica de polvo de supernova revelada en el centro galáctico

R M Lau¹, T L Herter², M R Morris³

¹Department of Astronomy, Cornell University, Ithaca, NY 14853, USA. ryanl@astro.cornell.edu.

Science (New York, N.Y.)

|March 21, 2015

Resumen

Los restos de supernovas pueden producir el polvo necesario para las primeras galaxias. Las observaciones muestran que el polvo sobrevive dentro de un antiguo remanente de supernova, lo que sugiere que las supernovas son productores clave de polvo en entornos galácticos densos.

Área de la Ciencia:

La astronomía y la astrofísica.
Formación del polvo cósmico.
Restos de supernovas de las supernovas.

Sus antecedentes:

Las eyecciones de supernovas son una teoría líder para el polvo del universo temprano.
La supervivencia del polvo dentro de los restos de supernovas (SNR) es incierta.

Objetivo del estudio:

Para investigar la supervivencia del polvo dentro de un remanente de supernova evolucionado.
Para evaluar el papel de las supernovas en la producción de polvo para las primeras galaxias.

Principales métodos:

Observaciones en el infrarrojo del Sagitario A Este SNR.
Análisis de las propiedades del polvo (masa, temperatura) y la densidad del medio circundante.

Principales resultados:

Se detectaron ~0.02 masas solares de polvo caliente (~100 K) cerca del centro SNR.
Se confirmó la supervivencia del polvo dentro de un SNR de ~10.000 años.
Se observó polvo en un ambiente denso (densidad de electrones ~10^3 cm^-3) que sobrevivió al choque inverso.

Conclusiones:

Las supernovas pueden producir y conservar polvo dentro de sus restos.
Este hallazgo apoya a las supernovas como una fuente de polvo dominante en los densos entornos de las primeras galaxias.

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