Weak lensing effect on CMB in the presence of a dipole anisotropy

Abhineet Agarwal; Naveen K. Singh; Pankaj Jain; Prabhakar Tiwari

doi:10.1140/epjc/s10052-019-7085-9

Weak lensing effect on CMB in the presence of a dipole anisotropy

Abhineet Agarwal, Naveen K. Singh^*, Pankaj Jain, Prabhakar Tiwari

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We investigate weak lensing effect on cosmic microwave background (CMB) in the presence of a superhorizon mode which leads to a dipole anisotropy in the CMB power spectrum and in large scale structures. The approach of flat-sky approximation is considered. We determine the functions σ02 and σ22 that appear in expressions of the lensed CMB power spectrum in the presence of the dipole anisotropy. We determine the correction to B-mode power spectrum which is found to be appreciable at low multipoles (l), around 15 % at l= 10. However, the temperature and E-mode power spectrum are not altered significantly.

Original language	English
Article number	582
Journal	European Physical Journal C
Volume	79
Issue number	7
DOIs	https://doi.org/10.1140/epjc/s10052-019-7085-9
State	Published - 1 Jul 2019
Externally published	Yes

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title = "Weak lensing effect on CMB in the presence of a dipole anisotropy",

abstract = "We investigate weak lensing effect on cosmic microwave background (CMB) in the presence of a superhorizon mode which leads to a dipole anisotropy in the CMB power spectrum and in large scale structures. The approach of flat-sky approximation is considered. We determine the functions σ02 and σ22 that appear in expressions of the lensed CMB power spectrum in the presence of the dipole anisotropy. We determine the correction to B-mode power spectrum which is found to be appreciable at low multipoles (l), around 15 % at l= 10. However, the temperature and E-mode power spectrum are not altered significantly.",

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AB - We investigate weak lensing effect on cosmic microwave background (CMB) in the presence of a superhorizon mode which leads to a dipole anisotropy in the CMB power spectrum and in large scale structures. The approach of flat-sky approximation is considered. We determine the functions σ02 and σ22 that appear in expressions of the lensed CMB power spectrum in the presence of the dipole anisotropy. We determine the correction to B-mode power spectrum which is found to be appreciable at low multipoles (l), around 15 % at l= 10. However, the temperature and E-mode power spectrum are not altered significantly.

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Weak lensing effect on CMB in the presence of a dipole anisotropy

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