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- W3105603522 abstract "Both multi-streaming (random motion) and bulk motion cause the Finger-of-God (FoG) effect in redshift space distortion (RSD). We apply a direct measurement of the multi-streaming effect in RSD from simulations, proving that it induces an additional, non-negligible FoG damping to the redshift space density power spectrum. We show that, including the multi-streaming effect, the RSD modelling is significantly improved. We also provide a theoretical explanation based on halo model for the measured effect, including a fitting formula with one to two free parameters. The improved understanding of FoG helps break the fσ8−σv degeneracy in RSD cosmology, and has the potential of significantly improving cosmological constraints." @default.
- W3105603522 created "2020-11-23" @default.
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- W3105603522 date "2017-05-16" @default.
- W3105603522 modified "2023-09-29" @default.
- W3105603522 title "Quantification of the multi-streaming effect in redshift space distortion" @default.
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- W3105603522 doi "https://doi.org/10.1088/1475-7516/2017/05/030" @default.
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