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Líneas de emisión de hierro de chorros de rayos X extendidos en SS 433: recalentamiento de núcleos atómicos
Simone Migliari1, Rob Fender, Mariano Méndez
1Astronomical Institute "Anton Pannekoek," University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, Netherlands. migliari@astro.uva.nl
Science (New York, N.Y.)
|September 7, 2002
Resumen
Los investigadores estudiaron los chorros de rayos X del binario de rayos X (XRB) SS 433 utilizando las observaciones de Chandra. Encontraron evidencia de recalentamiento in situ y velocidades relativistas en el chorro.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Astrofísica de altas energías de alta energía.
- Física de los agujeros negros.
Sus antecedentes:
- Los chorros relativistas son fenómenos energéticos asociados con la acumulación de agujeros negros y estrellas de neutrones.
- A pesar de los extensos estudios, la estructura y la composición de estos chorros siguen siendo poco conocidas.
- Los binarios de rayos X (XRB) proporcionan un laboratorio cercano para estudiar la formación y evolución de los chorros.
Objetivo del estudio:
- Para investigar la estructura y composición de los chorros relativistas del binario de rayos X SS 433.
- Para analizar datos espectroscópicos de rayos X con resolución espacial de los chorros de SS 433.
- Para comprender los procesos físicos que ocurren dentro de los chorros, como el recalentamiento y la aceleración de partículas.
Principales métodos:
- Utilizó el espectrómetro de imágenes de dispositivos avanzados acoplados a carga de Chandra para la espectroscopia de rayos X.
- Se realizó un análisis de resolución espacial de los chorros de rayos X de segunda escala de arco.
- Características espectrales analizadas, incluida la emisión continua y las líneas de emisión desplazadas por Doppler.
Principales resultados:
- Se detectó un continuo caliente y líneas de emisión de hierro desplazadas por Doppler en regiones de los chorros con resolución espacial.
- Proporcionó evidencia para el recalentamiento in situ del componente bariónico del jet.
- Velocidades masivas relativistas confirmadas que persisten más de 100 días después del lanzamiento del jet.
Conclusiones:
- El estudio revela procesos físicos en curso dentro de los chorros relativistas, desafiando las suposiciones anteriores sobre su evolución.
- El recalentamiento in situ es un mecanismo significativo que mantiene la alta energía y temperatura del material en chorro.
- Estos hallazgos ofrecen nuevos conocimientos sobre la compleja dinámica de los chorros impulsados por acreción en binarios de rayos X.
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