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Una ráfaga de radio rápida y repetida

L G Spitler1, P Scholz2, J W T Hessels3,4

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Anteriormente se pensaba que las ráfagas rápidas de radio (FRB) no se repetían. Las nuevas observaciones confirman que FRB 121102 es un FRB repetitivo, desafiando las teorías anteriores sobre su origen.

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Área de la Ciencia:

  • La astronomía
  • La astrofísica
  • Cosmología

Sus antecedentes:

  • Las ráfagas rápidas de radio (FRB) son enigmáticos pulsos de radio de milisegundos de duración desde distancias extragalácticas.
  • Las observaciones anteriores sugirieron que los FRB no se repetían, lo que implicaba orígenes cataclísmicos.
  • La naturaleza repetitiva de algunos FRB sigue siendo un rompecabezas clave en la astrofísica.

Objetivo del estudio:

  • Para investigar la naturaleza repetitiva de las ráfagas rápidas de radio FRB 121102.
  • Caracterizar las propiedades de las FRB repetitivas y sus fuentes.
  • Para probar las hipótesis con respecto a los orígenes físicos de los FRB.

Principales métodos:

  • Se utilizaron radiotelescopios para realizar observaciones de seguimiento de FRB 121102.
  • Se analizaron los tiempos de llegada de la ráfaga, las medidas de dispersión y las propiedades espectrales.
  • Comparamos los nuevos datos con las detecciones anteriores para confirmar el comportamiento repetitivo.

Principales resultados:

  • Detectamos diez ráfagas adicionales desde la dirección de FRB 121102, confirmando su naturaleza repetitiva.
  • Medidas de dispersión consistentes observadas y posiciones en el cielo para todos los estallidos detectados.
  • Caracterizó formas espectrales variables en escalas de tiempo cortas, lo que sugiere propiedades de fuente intrínsecas.

Conclusiones:

  • FRB 121102 es inequívocamente un FRB repetitivo, con su fuente sobreviviendo a eventos energéticos.
  • Las variaciones espectrales observadas apoyan un origen en una joven estrella de neutrones extragaláctica altamente magnetizada.
  • Estos hallazgos contribuyen a comprender los diversos orígenes de las ráfagas de radio rápidas.