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- W2014247008 abstract "The relationship between observed tracers such as galaxies and the underlying dark matter distribution is crucial in extracting cosmological information. As the linear bias model breaks down at quasilinear scales, the standard perturbative approach of the nonlinear Eulerian bias model is not accurate enough in describing galaxy clustering. In this paper, we discuss such a model in the context of resummed perturbation theory and further generalize it to incorporate the subsequent gravitational evolution by combining with a Lagrangian description of galaxies' motion. The multipoint propagators we constructed for such a model also exhibit exponential damping similar to their dark matter counterparts; therefore the convergence property of statistics built upon these quantities is improved. This is achieved by applying both Eulerian and Lagrangian resummation techniques of dark matter field developed in recent years. As inherited from the Lagrangian description of galaxy density evolution, our approach automatically incorporates the nonlocality induced by gravitational evolution after the formation of the tracer, and also allows us to include a continuous galaxy formation history by temporally weighted-averaging relevant quantities with the galaxy formation rate." @default.
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- W2014247008 date "2012-08-07" @default.
- W2014247008 modified "2023-09-25" @default.
- W2014247008 title "Resummed perturbation theory of galaxy clustering" @default.
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- W2014247008 doi "https://doi.org/10.1103/physrevd.86.043508" @default.
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