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Correlación de los rayos cósmicos de mayor energía con objetos extragalácticos cercanos
Resumen
Los rayos cósmicos de alta energía detectados en el Observatorio Pierre Auger se correlacionan con los núcleos galácticos activos cercanos (AGN). Esto sugiere que estas partículas energéticas se originan en fuentes extragalácticas dentro de 75 megaparsecs.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Física de las partículas Física de las partículas
- Física de los rayos cósmicos Física de los rayos cósmicos
Sus antecedentes:
- El origen de los rayos cósmicos de ultra-alta energía (UHECR) sigue siendo un misterio significativo en la astrofísica.
- Comprender las fuentes UHECR es crucial para comprender los mecanismos de aceleración de partículas en el universo.
Objetivo del estudio:
- Investigar la correlación potencial entre las direcciones de llegada de los UHECR y los objetos astrofísicos conocidos.
- Para probar la hipótesis de una distribución isotrópica frente a una distribución anisotrópica, impulsada por la fuente de los UHECR.
Principales métodos:
- Análisis de datos de rayos cósmicos recopilados durante 3.7 años en el Observatorio Pierre Auger.
- Comparación estadística de las direcciones de llegada de UHECR con las posiciones de los núcleos galácticos activos (AGN) dentro de una distancia específica.
Principales resultados:
- Se encontró una correlación estadísticamente significativa entre los UHECR (energía > 6 x 10 ^ 19 eV) y las ubicaciones de AGN cercanas (dentro de ~ 75 Mpc).
- La hipótesis de una distribución isotrópica de rayos cósmicos fue rechazada con >99% de confianza.
- La correlación observada apoya la teoría de que estas partículas de alta energía se originan en fuentes extragalácticas cercanas.
Conclusiones:
- Los núcleos galácticos activos (AGN) u objetos similares distribuidos espacialmente son fuentes probables de los rayos cósmicos de mayor energía.
- Los hallazgos sugieren una reducción mínima del flujo de las interacciones de radiación cósmica de fondo, lo que implica la proximidad de las fuentes.
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