| Autor: |
Brush, M, Linder, EV, Zumalacárregui, M |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Journal of Cosmology and Astroparticle Physics, vol 2019, iss 1 |
| Popis: |
No Slip Gravity is a simple modified gravity theory with only one free function and the interesting characteristic that - unlike many modified gravity theories - it suppresses growth. This allows it to fit current redshift space distortion and σ 8 mass fluctuation amplitude data better than ΛCDM in general relativity, while retaining a ΛCDM background expansion and hence distances. Since it has no gravitational slip it alters equally CMB lensing and matter density growth, and in addition affects the CMB gravitational wave B-mode polarization power spectrum. We investigate and compute the effects of No Slip Gravity for CMB lensing and B-modes, and present a simple analytic approximation. Using a Monte Carlo analysis, we place constraints on the theory from current CMB data. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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