Para acceder a los documentos con el texto completo, por favor, siga el siguiente enlace: http://hdl.handle.net/2445/98560
Título:
|
The shape of the primordial power spectrum: A last stand before Planck data
|
Autor/a:
|
Hiranya, V.P.; Verde, Licia
|
Otros autores:
|
Universitat de Barcelona |
Abstract:
|
We present a minimally parametric reconstruction of the primordial power spectrum using the most recent cosmic microwave background and large-scale structure data sets. Our goal is to constrain the shape of the power spectrum while simultaneously avoiding strong theoretical priors and over-fitting of the data. We find no evidence for any departure from a power-law spectral index. We also find that an exact scale-invariant power spectrum is disfavored by the data, but this conclusion is weaker than the corresponding result assuming a theoretically-motivated power-law spectral index prior. The reconstruction shows that better data are crucial to justify the adoption of such a strong theoretical prior observationally. These results can be used to determine the robustness of our present knowledge when compared with forthcoming precision data from Planck. |
Materia(s):
|
-Espectroscòpia -Constants físiques -Spectrum analysis -Physical constants |
Derechos:
|
(c) American Physical Society, 2010
|
Tipo de documento:
|
Artículo Artículo - Versión publicada |
Editor:
|
American Physical Society
|
Compartir:
|
|
Mostrar el registro completo del ítem