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- W3105642807 abstract "The large-scale clustering pattern of biased tracers is known to be a powerful probe of the non-Gaussianities in the primordial fluctuations. The so-called scale-dependent bias has been reported in various type of models of primordial non-Gaussianities. We focus on local-type non-Gaussianities, and unify the derivations in the literature of the scale-dependent bias in the presence of multiple Gaussian source fields as well as higher-order coupling to cover the models described by frequently-discussed fNL, gNL and tNL parameterization. We find that the resultant power spectrum is characterized by two parameters responsible for the shape and the amplitude of the scale-dependent bias in addition to the Gaussian bias factor. We show how (a generalized version of) Suyama-Yamaguchi inequality between fNL and tNL can directly be accessible from the observed power spectrum through the dependence on our new parameter which controls the shape of the scale-dependent bias. The other parameter for the amplitude of the scale-dependent bias is shown to be useful to distinguish the simplest quadratic non-Gaussianities (i.e., fNL-type) from higher-order ones (gNL and higher), if one measures it from multiple species of galaxies or clusters of galaxies. We discuss the validity and limitations of our analytic results by comparison with numerical simulations in an accompanying paper." @default.
- W3105642807 created "2020-11-23" @default.
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- W3105642807 date "2012-08-31" @default.
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- W3105642807 title "Scale dependence of the halo bias in general local-type non-Gaussian models I: analytical predictions and consistency relations" @default.
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- W3105642807 doi "https://doi.org/10.1088/1475-7516/2012/08/037" @default.
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