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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Una explosión gigante dos años antes del colapso del núcleo de una estrella masiva
A Pastorello1, S J Smartt, S Mattila
1Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UK. a.pastorello@qub.ac.uk
Nature
|June 15, 2007
Resumen
Hemos identificado al progenitor de una peculiar supernova de tipo Ib (SN 2006jc) como una estrella de Wolf-Rayet. Es probable que esta estrella estuviera rodeada por un medio rico en helio, lo que explica una transición óptica anterior.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Evolución Estelar Evolución Estelar
- Las supernovas son las supernovas.
Sus antecedentes:
- La muerte masiva de estrellas resulta en supernovas, con los tipos II, Ib e Ic vinculados a las estructuras estelares progenitoras.
- Si bien se conocen los precursores de las supernovas de tipo II, los progenitores de las supernovas de tipo Ib / Ic con deficiencia de hidrógeno siguen siendo poco conocidos.
- Los datos de observación directa sobre los progenitores de las supernovas de tipo Ib y Ic son escasos.
Objetivo del estudio:
- Para investigar el progenitor de la peculiar supernova de tipo Ib SN 2006jc.
- Comprender la naturaleza del brillante transitorio óptico observado en 2004 antes de SN 2006jc.
- Para explorar posibles explicaciones para el observado pre-explosión transitorio y su relación con la supernova.
Principales métodos:
- Espacialmente correlacionando SN 2006jc con un transitorio óptico previamente observado.
- Realización de monitoreo espectroscópico y fotométrico de la supernova SN 2006jc.
- Analizando las características del progenitor, incluyendo su tipo estelar y su entorno circumestelar.
Principales resultados:
- SN 2006jc fue espacialmente coincidente con un brillante transiente óptico de 2004.
- Se sugiere que el progenitor es una estrella Wolf-Rayet de carbono-oxígeno dentro de un medio circunstelar rico en helio.
- El transitorio pre-explosivo comparte similitudes con las explosiones luminosas de estrellas variables azules (LBV), pero difiere en la composición del progenitor.
Conclusiones:
- El progenitor de SN 2006jc fue probablemente una estrella de Wolf-Rayet, posiblemente experimentando un estallido de tipo LBV o parte de un sistema binario.
- Este hallazgo proporciona evidencia observacional potencial para estallidos similares a LBV de las estrellas Wolf-Rayet.
- Un sistema binario masivo que involucra un LBV y una estrella Wolf-Rayet es una explicación plausible para los fenómenos observados.
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