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Una nebulosa de rayos X asociada con el púlsar de milisegundos B1957+20
B W Stappers1, B M Gaensler, V M Kaspi
1Stichting ASTRON, 7990 Dwingeloo, Netherlands. stappers@astron.nl
Science (New York, N.Y.)
|March 1, 2003
Resumen
Las observaciones de rayos X revelan una nebulosa alrededor del pulsar binario de milisegundos B1957+20, lo que confirma que los pulsares disipan la energía de rotación a través de los vientos relativistas. La eficiencia de la aceleración de partículas es similar a la de los pulsares jóvenes.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Astrofísica de alta energía Astrofísica de alta energía
- Física de los púlsares La física de los púlsares.
Sus antecedentes:
- Los púlsares binarios de milisegundos son estrellas de neutrones que giran rápidamente en sistemas binarios.
- Los vientos púlsares son corrientes de partículas relativistas y campos magnéticos que emanan de los púlsares.
- La disipación de la energía de rotación del púlsar es un aspecto clave de la física del púlsar.
Objetivo del estudio:
- Para investigar la presencia y propiedades de una nebulosa de rayos X alrededor del púlsar binario de milisegundos B1957+20.
- Para confirmar el mecanismo de disipación de energía rotacional en pulsares de milisegundos.
- Para comparar la eficiencia de aceleración de partículas en este sistema con la de los pulsares jóvenes.
Principales métodos:
- Observaciones de rayos X del púlsar binario de milisegundos B1957+20.
- Análisis de la morfología y las características de emisión de la nebulosa de rayos X detectada.
- Comparación de las características observadas con modelos teóricos de vientos y choques de púlsares.
Principales resultados:
- Detección de una nebulosa de rayos X que rodea el púlsar binario de milisegundos B1957+20.
- Identificación de una cola estrecha correspondiente al viento pulsar de choque, localizado dentro del arco de choque H-alfa.
- Observación de la emisión no resuelta de rayos X indicativa de un viento de púlsar y el choque de colisión de viento de estrella compañera.
Conclusiones:
- El estudio confirma que los púlsares de milisegundos disipan la energía de rotación a través de vientos relativistas.
- Los hallazgos sugieren que la eficiencia de aceleración de partículas en el flujo de post-shock es comparable a la de los púlsares jóvenes.
- La proximidad del choque y el campo magnético más débil de este púlsar de milisegundos no alteran significativamente la eficiencia de aceleración de partículas.
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