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Un dipolo de velocidad en la distribución de las radiogalaxias
1Astrophysics, Nuclear and Astrophysics Laboratory, University of Oxford, UK. cab@astro.ox.uk
Nature
|March 15, 2002
Resumen
Nuestra galaxia es nuestra galaxia.
Área de la Ciencia:
- Cosmología Cosmología.
- La astrofísica es la astrofísica.
Sus antecedentes:
- El movimiento de la galaxia de la Vía Láctea a través del Universo causa un desplazamiento Doppler en la radiación cósmica de fondo de microondas, creando una anisotropía dipolo.
- Una anisotropía dipolar similar en la distribución de galaxias distantes es predicha por el modelo cosmológico estándar.
Objetivo del estudio:
- Para detectar la predicha anisotropía de dipolo cosmológico en la distribución de galaxias distantes.
- Para confirmar la interpretación cosmológica estándar de la radiación cósmica de fondo de microondas.
Principales métodos:
- Utilizó una encuesta de radiogalaxias, principalmente a distancias cosmológicas.
- Se han eliminado las radiogalaxias locales de la muestra para minimizar la contaminación de los cúmulos de galaxias cercanos.
Principales resultados:
- Se ha detectado una anisotropía dipolo en la distribución de radio galaxias distantes.
- El dipolo detectado se alinea en dirección y amplitud con la anisotropía del dipolo cósmico de fondo de microondas.
Conclusiones:
- Los hallazgos proporcionan evidencia de la anisotropía cosmológica del dipolo en la distribución de las galaxias.
- Los resultados apoyan el modelo cosmológico estándar y su interpretación del fondo cósmico de microondas.
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