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Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
Observaciones de polarización con el imager de fondo cósmico.
A C S Readhead1, S T Myers, T J Pearson
1Owens Valley Radio Observatory, California Institute of Technology, Pasadena, CA 91125, USA. acr@astro.caltech.edu
Science (New York, N.Y.)
|October 9, 2004
Resumen
Las observaciones de polarización del Fondo Cósmico de Microondas (CMB, por sus siglas en inglés) detectaron polarización en modo E. El espectro observado.
Área de la Ciencia:
- Cosmología Cosmología.
- La astrofísica es la astrofísica.
- Radiación de fondo de microondas cósmicas de fondo de radiación cósmica.
Sus antecedentes:
- El Fondo Cósmico de Microondas (CMB, por sus siglas en inglés) es una radiación reliquia del universo primitivo.
- Comprender la polarización del CMB proporciona información sobre los parámetros cosmológicos y la física del universo temprano.
Objetivo del estudio:
- Para detectar y caracterizar la polarización en modo E del CMB.
- Para comparar el espectro de potencia angular de la polarización CMB con el de la intensidad total.
Principales métodos:
- Se utilizaron datos del Imager de Fondo Cósmico (CBI, por sus siglas en inglés) recopilados entre septiembre de 2002 y mayo de 2004.
- Analizó las observaciones de polarización del CMB.
Principales resultados:
- Logró una detección significativa de la polarización en modo E en el CMB.
- Se observó un espectro de potencia angular de emisión polarizada con picos y valles.
- Se encontró que la fase del espectro de polarización se desplaza por medio ciclo en relación con el espectro de intensidad total.
Conclusiones:
- El acuerdo en la fase espectral apoya el modelo estándar de la cosmología.
- Los hallazgos son consistentes con un universo dominado por materia oscura y energía oscura.
- Los resultados apoyan una geometría casi plana y fluctuaciones de densidad primordial adiabática, alineándose con los modelos inflacionarios.
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