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Published on: July 2, 2012
PTF 11kx: una supernova de tipo Ia con un progenitor de nova simbiótico
B Dilday1, D A Howell, S B Cenko
1Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USA. bdilday@lcogt.net
Science (New York, N.Y.)
|August 28, 2012
Resumen
Las supernovas de tipo Ia (SNe Ia) se originan en enanas blancas en explosión. Nuevas observaciones de SN PTF 11kx revelan material circunstelar complejo, lo que sugiere un sistema progenitor de nova simbiótico similar a RS Ophiuchi.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Restos de supernovas de las supernovas.
- Evolución Estelar Evolución Estelar
Sus antecedentes:
- Las supernovas de tipo Ia (SNe Ia) son herramientas cosmológicas cruciales, pero sus sistemas progenitores siguen siendo poco conocidos.
- La evidencia observacional directa de las compañeras binarias y los entornos inmediatos de SNe Ia es escasa.
- La identificación de los sistemas progenitor es clave para refinar los modelos de supernovas y comprender la evolución estelar.
Objetivo del estudio:
- Para investigar el sistema progenitor de la supernova de tipo Ia PTF 11kx.
- Para caracterizar el entorno circunstelar y su interacción con las eyecciones de supernovas.
- Para determinar la naturaleza del compañero binario involucrado en el evento de supernova.
Principales métodos:
- Adquisición y análisis de una serie temporal de espectros ópticos de alta resolución de SN PTF 11kx.
- Examen detallado de las eyecciones de supernova y el material circunstelar circundante.
- Comparación de las características observadas con modelos teóricos de interacciones estelares y progenitores de supernovas.
Principales resultados:
- Detección de múltiples capas de material circunstelar alrededor de SN PTF 11kx.
- Observación de la interacción entre la SN eyectada y el material circunstelar comenzando 59 días después de la explosión.
- El complejo entorno circunstelar es consistente con un sistema simbiótico progenitor de nova.
Conclusiones:
- El sistema progenitor de SN PTF 11kx se describe mejor como una nova simbiótica, similar a RS Ophiuchi.
- Este hallazgo proporciona restricciones observacionales cruciales sobre la naturaleza de los progenitores de supernovas de tipo Ia.
- Se necesitan más estudios de entornos de supernovas similares para confirmar la prevalencia de tales sistemas.
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