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 $$\sigm...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2019-07-01
|
| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-019-7085-9 |
| _version_ | 1828781142438838272 |
|---|---|
| author | Abhineet Agarwal Naveen K. Singh Pankaj Jain Prabhakar Tiwari |
| author_facet | Abhineet Agarwal Naveen K. Singh Pankaj Jain Prabhakar Tiwari |
| author_sort | Abhineet Agarwal |
| collection | DOAJ |
| description | Abstract We investigate weak lensing effect on cosmic microwave background (CMB) in the presence of a superhorizon mode which leads to a dipole anisotropy in the CMB power spectrum and in large scale structures. The approach of flat-sky approximation is considered. We determine the functions $$\sigma _0^2$$ σ02 and $$\sigma _2^2$$ σ22 that appear in expressions of the lensed CMB power spectrum in the presence of the dipole anisotropy. We determine the correction to B-mode power spectrum which is found to be appreciable at low multipoles (l), around $$15\%$$ 15% at $$l=10$$ l=10 . However, the temperature and E-mode power spectrum are not altered significantly. |
| first_indexed | 2024-12-11T17:28:57Z |
| format | Article |
| id | doaj.art-3433c57edf324545b14a9db39712d6a1 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-11T17:28:57Z |
| publishDate | 2019-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-3433c57edf324545b14a9db39712d6a12022-12-22T00:56:53ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522019-07-017971810.1140/epjc/s10052-019-7085-9Weak lensing effect on CMB in the presence of a dipole anisotropyAbhineet Agarwal0Naveen K. Singh1Pankaj Jain2Prabhakar Tiwari3Centre for Theoretical Physics, Jamia Millia IslamiaSchool of Physics and Astronomy, Sun Yat-Sen University ZhuhaiDepartment of Physics, Indian Institute of TechnologyNational Astronomical Observatories, CASAbstract We investigate weak lensing effect on cosmic microwave background (CMB) in the presence of a superhorizon mode which leads to a dipole anisotropy in the CMB power spectrum and in large scale structures. The approach of flat-sky approximation is considered. We determine the functions $$\sigma _0^2$$ σ02 and $$\sigma _2^2$$ σ22 that appear in expressions of the lensed CMB power spectrum in the presence of the dipole anisotropy. We determine the correction to B-mode power spectrum which is found to be appreciable at low multipoles (l), around $$15\%$$ 15% at $$l=10$$ l=10 . However, the temperature and E-mode power spectrum are not altered significantly.http://link.springer.com/article/10.1140/epjc/s10052-019-7085-9 |
| spellingShingle | Abhineet Agarwal Naveen K. Singh Pankaj Jain Prabhakar Tiwari Weak lensing effect on CMB in the presence of a dipole anisotropy European Physical Journal C: Particles and Fields |
| title | Weak lensing effect on CMB in the presence of a dipole anisotropy |
| title_full | Weak lensing effect on CMB in the presence of a dipole anisotropy |
| title_fullStr | Weak lensing effect on CMB in the presence of a dipole anisotropy |
| title_full_unstemmed | Weak lensing effect on CMB in the presence of a dipole anisotropy |
| title_short | Weak lensing effect on CMB in the presence of a dipole anisotropy |
| title_sort | weak lensing effect on cmb in the presence of a dipole anisotropy |
| url | http://link.springer.com/article/10.1140/epjc/s10052-019-7085-9 |
| work_keys_str_mv | AT abhineetagarwal weaklensingeffectoncmbinthepresenceofadipoleanisotropy AT naveenksingh weaklensingeffectoncmbinthepresenceofadipoleanisotropy AT pankajjain weaklensingeffectoncmbinthepresenceofadipoleanisotropy AT prabhakartiwari weaklensingeffectoncmbinthepresenceofadipoleanisotropy |