Obtaining the CMB anomalies with a bounce from the contracting phase to inflation
Cosmology and Nongalactic Astrophysics
2013-10-15 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
Recent Planck data show the anomalies of CMB fluctuations on large angular scales, which confirms the early observations by WMAP. We continue studying an inflationary model, in which before the slow roll inflation the universe is in a contracting phase, and fit the model with the Planck data. It is showed that this model may generate not only the power deficit at low-l, but also a large hemispherical power asymmetry in CMB. We also discuss the implication of the result to the eternal inflation scenario.
Keywords
Cite
@article{arxiv.1304.6527,
title = {Obtaining the CMB anomalies with a bounce from the contracting phase to inflation},
author = {Zhi-Guo Liu and Zong-Kuan Guo and Yun-Song Piao},
journal= {arXiv preprint arXiv:1304.6527},
year = {2013}
}
Comments
21 pages, 9 figs, refs.added, Sec.III.B is written in detail, and how the primordial cutoff spectrum on large angular scale gives a large hemisphere asymmetry is showed, to publish in PRD