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Observando la supernova 1987A con el renovado telescopio espacial Hubble
Kevin France1, Richard McCray, Kevin Heng
1Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, CO 80309-0389, USA.
Science (New York, N.Y.)
|September 4, 2010
Resumen
Las observaciones del Telescopio Espacial Hubble revelan la evolución de choques astrofísicos en el remanente de supernova 1987A. Las líneas de emisión se iluminan y las velocidades disminuyen, lo que indica una aceleración de partículas dentro de campos electromagnéticos turbulentos.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Restos de supernovas de las supernovas.
- Física del plasma es la física del plasma.
Sus antecedentes:
- El remanente de Supernova 1987A proporciona un laboratorio único para el estudio de choques astrofísicos.
- Las observaciones a largo plazo son cruciales para comprender la evolución del choque y la aceleración de partículas.
Objetivo del estudio:
- Para analizar los cambios en las líneas de emisión de choque (Lyα, Hα, N v) en el remanente de supernova 1987A.
- Para investigar los mecanismos físicos que impulsan la aceleración y la dispersión de partículas dentro del choque sin colisión del remanente.
Principales métodos:
- Utilizando los datos del Telescopio Espacial Hubble (HST) de 2004 y 2010.
- Comparación de perfiles de líneas espectrales y velocidades de las emisiones Lyα, Hα y Nv.
- Analizando la dispersión de resonancia y los efectos del campo electromagnético turbulento.
Principales resultados:
- Las líneas de emisión Lyα y Hα muestran un brillo creciente.
- Las velocidades máximas de las emisiones de choque están disminuyendo.
- Lyα amplio y con desplazamiento al azul atribuido a la dispersión de resonancia; detección de emisión de la línea Nv desplazada al rojo de Lyα.
- Los distintos perfiles de línea N v sugieren dispersión de iones y aceleración por campos electromagnéticos turbulentos.
Conclusiones:
- Los choques astrofísicos en el remanente de supernova 1987A están evolucionando, con velocidades decrecientes y emisiones más brillantes.
- Los campos electromagnéticos turbulentos juegan un papel importante en la dispersión y aceleración de iones dentro del choque sin colisión.
- La dispersión resonante contribuye a los patrones de emisión de Lyα observados.
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