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- W2333019675 abstract "I adopt a formalism previously developed by Catelan and Theuns (CT) in order to estimate the impact of primordial non-Gaussianity on the quasi-linear spin growth of cold dark matter protostructures. A variety of bispectrum shapes are considered, spanning the currently most popular early Universe models for the occurrence of non-Gaussian density fluctuations. In their original work, CT considered several other shapes, and suggested that only for one of those does the impact of non-Gaussianity seem to be perturbatively tractable. For that model, and on galactic scales, the next-to-linear non-Gaussian contribution to the angular momentum variance has an upper limit of ∼10 per cent with respect to the linear one. I find that all the new models considered in this work can also be seemingly described via perturbation theory. Considering current bounds on fNL for inflationary non-Gaussianity leads to the quasi-linear contribution being ∼10–20 per cent of the linear one. This result motivates the systematic study of higher order non-Gaussian corrections, in order to attain a comprehensive picture of how structure gravitational dynamics descends from the physics of the primordial Universe." @default.
- W2333019675 created "2016-06-24" @default.
- W2333019675 creator A5075949128 @default.
- W2333019675 date "2013-02-11" @default.
- W2333019675 modified "2023-09-24" @default.
- W2333019675 title "Revisiting the angular momentum growth of protostructures evolved from non-Gaussian initial conditions" @default.
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- W2333019675 doi "https://doi.org/10.1093/mnrasl/slt009" @default.
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