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Medición de la polarización con el interferómetro de escala angular de grados
E M Leitch1, J M Kovac, C Pryke
1Department of Astronomy & Astrophysics, Center for Astrophysical Research in Antarctica, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637, USA. eml@polestar.uchicago.edu
Nature
|December 20, 2002
Resumen
El interferómetro de escala angular de grado (DASI) midió con éxito la polarización del fondo cósmico de microondas (CMB), una propiedad crucial para comprender el Universo temprano. Este avance brinda nuevos conocimientos sobre el Universo.
Área de la Ciencia:
- Cosmología Cosmología.
- La astrofísica es la astrofísica.
- La astronomía observacional es la astronomía de las observaciones.
Sus antecedentes:
- La radiación de fondo cósmico de microondas (CMB, por sus siglas en inglés) ofrece una visión precisa del Universo primitivo (aprox. 400.000 años de antigüedad).
- Las propiedades clave del CMB incluyen el espectro de frecuencia (temperatura), las fluctuaciones de temperatura y las fluctuaciones de polarización a través de escalas angulares.
- La medición de la polarización del CMB ha sido un desafío observacional significativo.
Objetivo del estudio:
- Describir el interferómetro de escala angular de grados (DASI) y sus capacidades.
- Informar sobre las observaciones sensibles a la polarización del CMB realizadas por DASI.
- Avanzar en la medición de la polarización del CMB, una propiedad fundamental del Universo primitivo.
Principales métodos:
- Utilizó el interferómetro de escala angular de grados (DASI), una serie de radiotelescopios.
- Realizó observaciones sensibles a la polarización del CMB.
- Las observaciones se realizaron en la estación de investigación del Polo Sur Amundsen-Scott durante dos años.
Principales resultados:
- Realizó con éxito observaciones sensibles a la polarización del CMB.
- Demostró la capacidad de detectar la polarización del CMB, superando las limitaciones anteriores.
- Recopilación de datos sobre las fluctuaciones de polarización del CMB a través de escalas angulares.
Conclusiones:
- El instrumento DASI ha medido con éxito la polarización del CMB.
- Estas mediciones representan un avance significativo en la cosmología observacional.
- Los hallazgos allanan el camino para una comprensión más profunda de las propiedades fundamentales del Universo.
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