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Un sistema progenitor luminoso y azul para la supernova tipo Iax 2012ZZ
Curtis McCully1, Saurabh W Jha1, Ryan J Foley2
1Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, New Jersey 08854, USA.
Nature
|August 8, 2014
Resumen
Las supernovas de tipo Iax, una subclase menos energética de las supernovas de tipo Ia, son a menudo explosiones de enanas blancas. El progenitor de SN 2012Z fue identificado como un sistema azul luminoso, lo que sugiere una estrella de helio compañera.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Evolución Estelar Evolución Estelar
- Las supernovas son las supernovas.
Sus antecedentes:
- Las supernovas de tipo Iax son una subclase de las supernovas de tipo Ia, caracterizadas por velocidades de eyección y luminosidades más bajas.
- Sus espectros tardíos divergen del Tipo Ia, pero la composición sugiere una conexión.
- Se producen en un 5-30% de la tasa de supernovas normales de tipo Ia.
Objetivo del estudio:
- Para identificar el sistema progenitor de la supernova tipo Iax SN 2012Z.
- Investigar la naturaleza de las supernovas de tipo Iax y su relación con las supernovas de tipo Ia.
Principales métodos:
- Se utilizaron imágenes profundas previas a la explosión para detectar el sistema progenitor de SN 2012Z.
- Análisis espectroscópico y fotométrico del sistema progenitor.
- Comparación con sistemas estelares conocidos, incluida la nova de helio V445 Puppis.
Principales resultados:
- El luminoso sistema progenitor azul de SN 2012Z fue detectado en imágenes previas a la explosión.
- Las características del sistema progenitor (luminosidad, colores, entorno) se asemejan a las de la nova de helio V445 Puppis.
- Los hallazgos sugieren que SN 2012Z fue el resultado de una enana blanca que se acrecentó de una estrella de helio compañera.
Conclusiones:
- El sistema progenitor de SN 2012Z admite modelos de supernovas tipo Iax que involucran enanas blancas en acreción.
- Este descubrimiento proporciona información crucial sobre los mecanismos de formación y explosión de las supernovas de tipo Iax.
- Se necesitan más observaciones después de la desaparición de SN 2012Z para confirmar la hipótesis progenitora o explorar escenarios alternativos.
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