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タイトル: | CMB anomalies and the effects of local features of the inflaton potential |
著者: | Gallego Cadavid, Alexander Romano, Antonio Enea |
発行日: | Apr-2017 |
出版者: | Springer Nature |
誌名: | The European Physical Journal C |
巻: | 77 |
号: | 4 |
論文番号: | 242 |
抄録: | Recent analysis of the WMAP and Planck data have shown the presence of a dip and a bump in the spectrum of primordial perturbations at the scales k=0.002k=0.002 Mpc[−1] and k=0.0035k=0.0035 Mpc[−1], respectively. We analyze for the first time the effects of a local feature in the inflaton potential to explain the observed deviations from scale invariance in the primordial spectrum. We perform a best-fit analysis of the cosmic microwave background (CMB) radiation temperature and polarization data. The effects of the features can improve the agreement with observational data respect to the featureless model. The best-fit local feature affects the primordial curvature spectrum mainly in the region of the bump, leaving the spectrum unaffected on other scales. |
著作権等: | © The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3 |
URI: | http://hdl.handle.net/2433/225290 |
DOI(出版社版): | 10.1140/epjc/s10052-017-4797-6 |
出現コレクション: | 学術雑誌掲載論文等 |
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