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Un púlsar de milisegundos en un sistema estelar triple.

S M Ransom1, I H Stairs2, A M Archibald3

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Un sistema triple con un púlsar de milisegundos y dos enanas blancas exhibe fuertes interacciones gravitacionales. Este sistema ofrece un laboratorio único para probar la teoría de la relatividad general de Einstein y el principio de equivalencia fuerte.

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Área de la Ciencia:

  • La astronomía y la astrofísica.
  • Física gravitacional La física gravitacional es la física de las fuerzas gravitacionales.
  • Evolución estelar de la evolución estelar.

Sus antecedentes:

  • Los sistemas de tres cuerpos son comunes en las galaxias y ofrecen información sobre las propiedades de los cuerpos celestes y las teorías de la gravedad.
  • Los sistemas triples que contienen pulsares son raros y proporcionan mediciones precisas para probar la física.
  • Sistemas anteriores como el PSR B1620-26 mostraron interacciones débiles, limitando su utilidad.

Objetivo del estudio:

  • Para reportar el cronometraje de precisión y las observaciones de múltiples longitudes de onda del sistema triple jerárquico PSR J0337+1715.
  • Para analizar las fuertes interacciones gravitacionales dentro de este sistema.
  • Evaluar su potencial para probar el principio de fuerte equivalencia de la relatividad general.

Principales métodos:

  • El tiempo de precisión del púlsar de milisegundos.
  • Observaciones de múltiples longitudes de onda de los componentes del sistema.
  • Análisis de la dinámica orbital y las interacciones gravitacionales.

Principales resultados:

  • Determinó las masas del púlsar y sus dos compañeras enanas blancas.
  • Se midieron las inclinaciones de las órbitas para ser de aproximadamente 39,2 grados.
  • Se observaron órbitas inesperadamente coplanares y casi circulares, lo que sugiere una historia evolutiva exótica.

Conclusiones:

  • El fuerte campo gravitacional de la enana blanca externa acelera el binario interno, incluida la estrella de neutrones.
  • PSR J0337+1715 sirve como un laboratorio ideal para probar el principio de equivalencia fuerte.
  • La configuración orbital del sistema desafía los modelos existentes de evolución del sistema estelar.