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Una prueba extragaláctica precisa de la Relatividad General

Thomas E Collett1, Lindsay J Oldham2, Russell J Smith3

  • 1Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Road, Portsmouth PO1 3FX, UK. thomas.collett@port.ac.uk.

Science (New York, N.Y.)
|June 23, 2018
PubMed
Resumen
Este resumen es generado por máquina.

La teoría de la Relatividad General de Einstein fue probada utilizando la lente gravitacional ESO 325-G004. El estudio midió el régimen de campo débil de la gravedad, dando resultados consistentes con las predicciones de la relatividad general.

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Área de la Ciencia:

  • La astrofísica
  • Cosmología
  • Lentes gravitacionales

Sus antecedentes:

  • La Relatividad General (GR) ha sido validada en las escalas del Sistema Solar.
  • La naturaleza de largo alcance de la gravedad y su régimen de campo débil permanecen menos restringidos.
  • Las lentes gravitacionales ofrecen oportunidades únicas para probar la gravedad en entornos extragalácticos.

Objetivo del estudio:

  • Para sondear el régimen de campo débil de la gravedad usando una lente gravitacional fuerte.
  • Para medir la curvatura espacial por unidad de masa (γ) generada por una galaxia masiva.
  • Para probar la teoría de la relatividad general de Einstein en un contexto extragaláctico.

Principales métodos:

  • Utilizó la lente gravitacional fuerte ESO 325-G004 como un laboratorio natural.
  • Reconstruido el perfil de luz de los arcos de lente y la cinemática estelar utilizando un modelo autoconsistente.
  • Se analiza la curvatura espacial generada por unidad de masa (γ).

Principales resultados:

  • Se ha medido el parámetro de curvatura espacial γ = 0,97 ± 0,09 con una fiabilidad del 68%.
  • El valor obtenido es consistente con la predicción de γ = 1 de la Relatividad General.
  • Estableció una fuerte restricción extragaláctica en la métrica de campo débil de la gravedad.

Conclusiones:

  • El estudio proporciona una fuerte evidencia observacional que apoya la relatividad general en el régimen de campo débil.
  • La lente gravitacional ESO 325-G004 sirve como una herramienta poderosa para probar la física fundamental.
  • Esta investigación refina nuestra comprensión del comportamiento de la gravedad en grandes escalas.