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http://hdl.handle.net/2445/98560
Title: | The shape of the primordial power spectrum: A last stand before Planck data |
Author: | Hiranya, V.P. Verde, Licia |
Keywords: | Espectroscòpia Constants físiques Spectrum analysis Physical constants |
Issue Date: | 2010 |
Publisher: | American Physical Society |
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. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevD.81.021302 |
It is part of: | Physical Review D, 2010, vol. 81, num. 2, p. 021302-1-021302-5 |
URI: | http://hdl.handle.net/2445/98560 |
Related resource: | http://dx.doi.org/10.1103/PhysRevD.81.021302 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Publicacions de projectes de recerca finançats per la UE |
Files in This Item:
File | Description | Size | Format | |
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603915.pdf | 2.72 MB | Adobe PDF | View/Open |
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