# Local Primordial Non-Gaussianities and super-sample variance

@article{Castorina2020LocalPN, title={Local Primordial Non-Gaussianities and super-sample variance}, author={Emanuele Castorina and Azadeh Moradinezhad Dizgah}, journal={Journal of Cosmology and Astroparticle Physics}, year={2020}, volume={2020}, pages={007 - 007} }

Fluctuations with wavelengths larger than the volume of a galaxy survey affect the measurement of the galaxy power spectrum within the survey itself. In the presence of local Primordial Non-Gaussianities (PNG), in addition to super-sample matter density and tidal fluctuations, the large-scale gravitational potential also induces a modulation of the observed power spectrum. In this work we investigate this modulation by computing for the first time the response of the redshift-space galaxy power…

## 6 Citations

### On the impact of galaxy bias uncertainties on primordial non-Gaussianity constraints

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2020

We study the impact that uncertainties on assumed relations between galaxy bias parameters have on constraints of the local PNG fNL parameter. We focus on the relation between the linear density…

### The observed galaxy power spectrum in General Relativity

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2022

Measurements of the clustering of galaxies in Fourier space, and at low wavenumbers, offer a window into the early Universe via the possible presence of scale dependent bias generated by Primordial…

### Predictions for local PNG bias in the galaxy power spectrum and bispectrum and the consequences for f NL constraints

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2022

We use hydrodynamical separate universe simulations with the IllustrisTNG model to predict the local primordial non-Gaussianity (PNG) bias parameters b ϕ and b ϕδ, which enter at leading order in the…

### Lagrangian approach to super-sample effects on biased tracers at field level: galaxy density fields and intrinsic alignments

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2021

It has been recognized that the observables of large-scale structure (LSS) is susceptible to long-wavelength density and tidal fluctuations whose wavelengths exceed the accessible scale of a…

### Density reconstruction from biased tracers and its application to primordial non-Gaussianity

- PhysicsPhysical Review D
- 2021

Large-scale Fourier modes of the cosmic density field are of great value for learning about cosmology because of their well-understood relationship to fluctuations in the early universe. However,…

### Statistics of a single sky: constrained random fields and the imprint of Bardeen potentials on galaxy clustering

- Physics
- 2020

We explore the implications of a single observer's viewpoint on measurements of galaxy clustering statistics. We focus on the Bardeen potentials, which imprint characteristic scale-dependent…

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