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La metamorfosis de la supernova SN 2008D/XRF 080109: un vínculo entre las supernovas y los GRB/hipernovas
Paolo A Mazzali1, Stefano Valenti, Massimo Della Valle
1Max-Planck Institut für Astrophysik, Karl-Schwarzschild-Strasse 1, 85748 Garching, Germany. mazzali@mpa-garching.mpg.de
Science (New York, N.Y.)
|July 26, 2008
Resumen
SN 2008D, una peculiar supernova, exhibió características inusuales que sugieren un débil chorro relativista de una formación de agujero negro. Esto indica que la actividad del motor interno ocurre en la mayoría de los colapsos de estrellas masivas.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Explosiones cósmicas, explosiones cósmicas.
- La investigación de las supernovas.
Sus antecedentes:
- Las explosiones de rayos gamma (GRB) y la emisión de rayos X están vinculadas a las hipernovas (HNe), un tipo de supernova energética.
- SN 2008D mostró características atípicas, que se desvían de las típicas supernovas tipo Ic de línea ancha.
Objetivo del estudio:
- Para analizar las características inusuales de SN 2008D.
- Para determinar la naturaleza de la explosión de SN 2008D y su estrella progenitora.
- Para investigar la conexión entre el colapso estelar, la formación de agujeros negros y los chorros relativistas.
Principales métodos:
- Análisis detallado de los datos de observación de SN 2008D, incluidas las curvas de luz óptica y de rayos X.
- Comparación de la energía de la explosión y la masa expulsada de SN 2008D con las de las supernovas y hipernovas normales.
- Modelado de la masa de la estrella progenitora y el mecanismo de colapso.
Principales resultados:
- SN 2008D exhibió un débil destello de rayos X (XRF), un pico óptico temprano y características espectrales de las supernovas de tipo Ib y tipo Ic.
- Su energía de explosión y masa eyectada fueron intermedias entre el SNe Ibc normal y el HNe.
- El análisis sugiere que una estrella progenitora de aproximadamente 30 masas solares colapsó para formar un agujero negro y un débil chorro relativista.
Conclusiones:
- SN 2008D representa una de las explosiones productoras de chorros más débiles observadas.
- Los hallazgos implican que la actividad del motor interno, que conduce a la producción de chorros, es un fenómeno común durante la formación de agujeros negros a partir del colapso de estrellas masivas.
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