Pip analysis of the cosmic microwave background data: application to the Tenerife experiment
We present two geometrical methods to analyse the cosmic microwave background data along a strip in the sky. These methods are motivated by the fact that the temperature fluctuation field, on large angular scales, is not ergodic on the cosmic photosphere. This property is examined in the context of...
| Autores: | , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 1994 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/394090 |
| Acesso em linha: | http://hdl.handle.net/10261/394090 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Methods: data analysis Cosmology: observations Cosmic microwave background |
| Resumo: | We present two geometrical methods to analyse the cosmic microwave background data along a strip in the sky. These methods are motivated by the fact that the temperature fluctuation field, on large angular scales, is not ergodic on the cosmic photosphere. This property is examined in the context of different experimental configurations. The methods involve a numerical study of the expected pip number and distribution function of pip sizes, and take into account the non-ergodicity of the temperature field. They are applied to the new measurements of the Tenerife experiment, assuming a Gaussian random field for the temperature fluctuations with power spectra p α k in a flat universe. Moreover, these geometrical methods can be readily used to test non-Gaussian random fields as representations of the cosmic microwave background temperature fluctuations. |
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