Corpus ID: 235829554

Predictions for local PNG bias in the galaxy power spectrum and bispectrum and the consequences for $f_{\rm NL}$ constraints

@inproceedings{Barreira2021PredictionsFL,
  title={Predictions for local PNG bias in the galaxy power spectrum and bispectrum and the consequences for \$f\_\{\rm NL\}\$ constraints},
  author={Alexandre Barreira},
  year={2021}
}
We use hydrodynamical separate universe simulations with the IllustrisTNG model to predict the local primordial non-Gaussianity (PNG) bias parameters bφ and bφδ, which enter at leading order in the galaxy power spectrum and bispectrum. This is the first time that bφδ is measured from either gravity-only or galaxy formation simulations. For dark matter halos, the popular assumption of universality overpredicts the bφδ(b1) relation in the range 1 . b1 . 3 by up to ∆bφδ ∼ 3 (b1 is the linear… Expand

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References

SHOWING 1-10 OF 107 REFERENCES
Constraining primordial non-Gaussianity with bispectrum and power spectrum from upcoming optical and radio surveys
We forecast constraints on primordial non-Gaussianity (PNG) and bias parameters from measurements of galaxy power spectrum and bispectrum in future radio continuum and optical surveys. In the galaxyExpand
The halo bispectrum in N-body simulations with non-Gaussian initial conditions: The halo bispectrum and non-Gaussian initial conditions
We present measurements of the bispectrum of dark matter halos in numerical simulations with non-Gaussian initial conditions of the local type. We show, in the first place, that the overall effect ofExpand
Redshift-weighted constraints on primordial non-Gaussianity from the clustering of the eBOSS DR14 quasars in Fourier space
We present constraints on local primordial non-Gaussianity (PNG), parametrized through $f^{\rm loc}_{\rm NL}$, using the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic SurveyExpand
Using correlations between cosmic microwave background lensing and large-scale structure to measure primordial non-Gaussianity
We apply a new method to measure primordial non-Gaussianity, using the cross-correlation between galaxy surveys and the CMB lensing signal to measure galaxy bias on very large scales, whereExpand
Galaxy bispectrum, primordial non-Gaussianity and redshift space distortions
Measurements of the non-Gaussianity of the primordial density field have the power to considerably improve our understanding of the physics of inflation. Indeed, if we can increase the precision ofExpand
Improved Primordial Non-Gaussianity Constraints from Measurements of Galaxy Clustering and the Integrated Sachs-Wolfe Effect
We present the strongest robust constraints on primordial non-Gaussianity (PNG) from currently available galaxy surveys, combining large-scale clustering measurements and their cross correlationsExpand
The clustering of galaxies in the completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Primordial non-Gaussianity in Fourier Space
We present measurements of the local primordial non-Gaussianity parameter f local NL from the clustering of 343,708 quasars with redshifts 0.8 < z < 2.2 distributed over 4808 square degrees from theExpand
Constraints on primordial non-Gaussianity from large scale structure probes
In this paper we measure the angular power spectra C{sub l} of three high-redshift large-scale structure probes: the radio sources from the NRAO VLA Sky Survey (NVSS), the quasar catalogue of SloanExpand
Scale-dependent bias induced by local non-Gaussianity: a comparison to N-body simulations
We investigate the effect of primordial non-Gaussianity of the local fNL type on the auto- and cross-power spectra of dark matter haloes using simulations of the cold dark matter cosmology. WeExpand
Primordial non-Gaussianity from biased tracers: likelihood analysis of real-space power spectrum and bispectrum
Upcoming galaxy redshift surveys promise to significantly improve current limits on primordial non-Gaussianity (PNG) through measurements of 2- and 3-point correlation functions in Fourier space.Expand
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