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Rapida formación de grandes granos de polvo en la luminosa supernova 2010jl
Christa Gall1, Jens Hjorth2, Darach Watson2
11] Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark [2] Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark [3] Observational Cosmology Lab, Code 665, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
Nature
|July 18, 2014
Resumen
Las explosiones de supernovas forman rápidamente grandes granos de polvo en el gas que las rodea. Este estudio rastrea la evolución del polvo, vinculando su formación temprana al crecimiento posterior dentro de las eyecciones de supernovas.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Formación del polvo cósmico.
- Restos de supernovas de las supernovas.
Sus antecedentes:
- El origen y el crecimiento del polvo cósmico siguen siendo poco conocidos.
- Las supernovas son los principales productores de elementos pesados, pero los mecanismos de formación de polvo son objeto de debate.
- Las observaciones muestran una variada presencia de polvo en las supernovas, lo que complica las teorías de origen.
Objetivo del estudio:
- Para investigar la rápida formación de polvo en el denso medio circunstelar de una supernova.
- Para caracterizar el tamaño y las propiedades de los granos de polvo recién formados.
- Para vincular la formación temprana de polvo a la evolución posterior del polvo en las eyecciones de supernovas.
Principales métodos:
- Análisis espectroscópico de la luz de la supernova SN 2010jl.
- Medición de la extinción dependiente de la longitud de onda para inferir las propiedades del polvo.
- Monitoreo de la emisión térmica del infrarrojo cercano a lo largo del tiempo.
Principales resultados:
- Se observa una rápida formación de polvo (40-240 días) en el denso medio circumestelar.
- Detección de granos de polvo grandes (>1 micrómetro) resistentes a la destrucción. detección de granos de polvo grandes (>1 micrómetro) resistentes a la destrucción. detección de granos de polvo grandes (>1 micrómetro) resistentes a la destrucción. detección de granos de polvo grandes (>1 micrómetro) resistentes a la destrucción.
- Crecimiento acelerado de la masa de polvo (500-900 días) que indica un cambio del medio circumestelar al medio eyectado.
Conclusiones:
- Las supernovas con medios circunstelares densos pueden formar rápidamente cantidades sustanciales de granos de polvo grandes.
- Este estudio proporciona un vínculo crucial entre la evolución temprana y tardía del polvo en las supernovas.
- Los hallazgos ofrecen información sobre las vías de producción de polvo en el universo temprano.
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