| Автор | Zong-Kuan Guo |
| Автор | Yuan-Zhong Zhang |
| Дата выпуска | 2011-11-01 |
| dc.description | We use the localized principle component analysis to detect deviations from scale invariance of the primordial power spectrum of curvature perturbations. With the technique we make uncorrelated estimates of the primordial power spectrum with five wavenumber bins. In the framework of a minimal ΛCDM model, using the latest cosmic microwave background data from the WMAP and ACT experiments we find that more than 95% of the preferred models are incompatible with the assumption of scale-invariance, but still compatible with a power-law primordial spectrum. We also forecast the sensitivity and constraints achievable by the Planck experiment by performing Monte Carlo studies on simulated data. Planck could significantly improve the constraints on the primordial power spectrum, especially at small scales by roughly a factor of 4. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Uncorrelated estimates of the primordial power spectrum |
| Тип | paper |
| DOI | 10.1088/1475-7516/2011/11/032 |
| Electronic ISSN | 1475-7516 |
| Журнал | Journal of Cosmology and Astroparticle Physics |
| Том | 2011 |
| Первая страница | 32 |
| Последняя страница | 032 |
| Аффилиация | Zong-Kuan Guo; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190, China |
| Аффилиация | Yuan-Zhong Zhang; State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190, China |
| Выпуск | 11 |
