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Los astrónomos observaron rápidas llamaradas ópticas del transitorio AT2022tsd, lo que sugiere una fuente de energía potente y compacta. Este hallazgo apoya la idea de que algunos transitorios ópticos extragalácticos son alimentados por magnetares o agujeros negros en acrecentamiento.

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Área de la Ciencia:

  • Astronomía y astrofísica
  • Astrofísica de altas energías
  • Los acontecimientos transitorios

Sus antecedentes:

  • Los transitorios ópticos extragalácticos luminosos que duran sólo días difieren de las supernovas típicas.
  • Los transitorios similares a las vacas de AT2018 exhiben colores azules y fuertes emisiones de radio / rayos X, lo que insinúa fuentes de energía únicas.
  • Las observaciones anteriores sugirieron fuentes de energía incrustadas en los transitorios similares a las vacas de AT2018, incluida la variabilidad de los rayos X y la emisión de rayos UV.

Objetivo del estudio:

  • Investigar la naturaleza de la enfermedad transitorio de tipo vaca AT2018 AT2022.
  • Para caracterizar los fenómenos energéticos después del evento AT2022tsd.
  • Para confirmar la presencia y el tipo de objeto compacto que alimenta estos transitorios.

Principales métodos:

  • Observación de las llamaradas ópticas de AT2022tsd durante varios meses.
  • Análisis de la duración de la llamarada, la energía y las propiedades espectrales.
  • Comparación con fenómenos transitorios conocidos y modelos teóricos.

Principales resultados:

  • Descubrimiento de llamaradas ópticas de minutos de duración en las secuelas de AT2022tsd.
  • Las llamaradas eran altamente energéticas y probablemente de origen no térmico.
  • La evidencia apunta hacia un flujo de salida o chorro casi relativista de la fuente transitoria.

Conclusiones:

  • Las llamaradas observadas confirman una fuente de energía compacta para los transitorios AT2022.
  • La fuente de energía es probablemente un magnetar o un agujero negro en acreción.
  • Estos hallazgos avanzan en nuestra comprensión de los transitorios ópticos extragalácticos de corta duración.