Lensing anomalies from the epoch of reionisation
| Autor: | Julien Lesgourgues, Christophe Ringeval, Christian Fidler |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO) 010308 nuclear & particles physics Epoch (reference date) Cosmic microwave background FOS: Physical sciences Spectral density Astronomy and Astrophysics Observable General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences General Relativity and Quantum Cosmology Computer Science::Computer Vision and Pattern Recognition 0103 physical sciences Order of magnitude Weak gravitational lensing Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Journal of Cosmology and Astroparticle Physics. 2019:042-042 |
| ISSN: | 1475-7516 |
| Popis: | Reionisation blurring is a non-linear correction to the cosmic microwave background that acts similar to weak gravitational lensing and that can be computed from linear perturbations through a blurring potential. Its impact on the cosmic microwave background is roughly two order of magnitude smaller than that of lensing, in isolation. But the blurring potential is strongly correlated with the lensing potential thereby generating a potentially observable cross-correlation. We compute for the first time the inclusive impact of reionisation blurring on the temperature angular power spectrum and discuss how much it could induce lensing anomalies Comment: 19 pages, 4 figures, uses jcappub. Discussions and references added, matches published version |
| Databáze: | OpenAIRE |
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