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Una oleada de luz en el nacimiento de una supernova
M C Bersten1,2,3, G Folatelli1,2,3, F García2,4,5
1Instituto de Astrofísica de La Plata (IALP), CONICET, Argentina.
Nature
|February 23, 2018
Resumen
Los científicos descubrieron por casualidad una supernova de tipo IIb (SN 2016gkg), que revela un rápido brillo óptico. Esto permitió un estudio detallado de la estrella en explosión
Área de la Ciencia:
- Astronomía y astrofísica
- Evolución estelar
- Física de las supernovas
Sus antecedentes:
- Las estrellas masivas que explotan como supernovas son difíciles de estudiar.
- La emisión electromagnética temprana proporciona datos cruciales sobre la evolución y la estructura estelar.
- La imprevisibilidad de las supernovas a menudo impide la observación de esta fase temprana crítica.
Objetivo del estudio:
- Para investigar las propiedades de las estrellas masivas durante explosiones de supernovas.
- Para analizar los primeros minutos a horas de emergencia de la emisión electromagnética después del choque.
- Para entender la estructura más externa de los progenitores de supernovas y la física de emergencia de choque.
Principales métodos:
- Descubrimiento fortuito y observaciones ópticas frecuentes de una supernova de tipo IIb (SN 2016gkg).
- Desarrollo de modelos hidrodinámicos para simular las fases de explosión de supernovas.
- Análisis del brillo rápido (aprox. 40 magnitudes por día) para sondear las propiedades progenitoras.
Principales resultados:
- Caracterización detallada de las capas más externas del progenitor de la supernova.
- Conocimiento de la física que rige el surgimiento de la onda de choque.
- Modelado exitoso de la evolución completa de la supernova a través de diferentes fases físicas.
Conclusiones:
- El rápido brillo de SN 2016gkg ofrece una ventana única en los progenitores de las supernovas.
- Los modelos hidrodinámicos replican con éxito la evolución observada de las supernovas.
- La propagación del choque puede estudiarse independientemente del mecanismo de disparo de la explosión.
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