Probing the anisotropic expansion history of the universe using CMBR

7th International Conference on Gravitation and Cosmology

Mohapatra, R.K.^1 ; Saumia, P.S.^1 ; Srivastava, A.M.^1

Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, India^1

关键词: Anisotropic expansion;    Density perturbation;    Shape analysis;    Shape deformation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/484/1/012040/pdf
DOI  :  10.1088/1742-6596/484/1/012040

来源: IOP

【 摘 要 】

We have proposed a technique to detect any anisotropic expansion in the universe from the beginning of inflation to the last scattering. Any anisotropic expansion in the universe would deform the shape of the primordial density perturbations in the universe, and a shape analysis of the super-horizon fluctuations in CMBR will detect this shape deformation. Using this analysis, we have constrainted any anisotropic expansion in the universe to be less than 35%.