Observational constraints on anisotropies for bouncing alternatives to inflation
Observational constraints on anisotropies for bouncing alternatives to inflation
复制标题
对通货膨胀替代方案的各向异性的观测限制
DOI:
10.1088/1475-7516/2022/10/045
复制
发表时间:
2022
影响因子:
6.4
通讯作者:
Wilson-Ewing, Edward
中科院分区:
文献类型:
--
作者:
Agullo, Ivan;Olmedo, Javier;Wilson-Ewing, Edward
We calculate how primordial anisotropies in the background space-time affect the evolution of cosmological perturbations for bouncing alternatives to inflation, like ekpyrosis and the matter bounce scenario. We find that the leading order effect of anisotropies in the contracting phase of the universe is to induce anisotropies in the cosmic microwave background with a very concrete form: a scale-invariant quadrupolar angular distribution. Sub-leading effects are the generation of higher-order moments in the angular distribution, as well as cross-correlations between scalar and tensor modes. We also find that observational constraints from the cosmic microwave background on the quadrupole moment provide strong bounds on allowed anisotropies for bouncing alternatives to inflation that are significantly more constraining than the bounds previously obtained using scaling arguments based on the conjectured Belinski-Khalatnikov-Lifshitz instability.
登录
查看更多内容
DOI:
--
发表时间:
2011-04
期刊:
arXiv: Instrumentation and Methods for Astrophysics
影响因子:
--
作者:
J. Lesgourgues
通讯作者:
J. Lesgourgues
影响因子:
5
作者:
S. Ramazanov;G. Rubtsov
通讯作者:
S. Ramazanov;G. Rubtsov
DOI:
10.1086/303633
发表时间:
1997
期刊:
The Astrophysical Journal
影响因子:
--
作者:
W. Stoeger;M. Araújo;Tim Gebbie
通讯作者:
Tim Gebbie
影响因子:
5
作者:
T. Cailleteau;Parampreet Singh;K. Vandersloot
通讯作者:
T. Cailleteau;Parampreet Singh;K. Vandersloot
影响因子:
5
作者:
I. Agulló;J. Olmedo;V. Sreenath
通讯作者:
I. Agulló;J. Olmedo;V. Sreenath