Local Primordial Non-Gaussianities and super-sample variance

摘要: Fluctuations with wavelengths larger than the volume of a galaxy survey affect measurement power spectrum within itself. In presence local Primordial Non- Gaussianities (PNG), in addition to super-sample matter density and tidal fluctuations, large-scale gravitational potential also induces modulation observed spectrum. this work we investigate by computing for first time response redshift-space long wavelength potential, fully accounting stochastic contributions. For biased tracers new functions arise due couplings between small-scale fluctuations density, velocity fields, latter through scale dependent bias operators, potential. We study impact modes on amplitude primordial bispectrum local-shape, $f_{\rm NL}^{\rm loc}$, modulations both signal covariance modes. Considering DESI-like specifications, show that most cases cause little or no degradation constraints, could actually reduce errorbars loc}$ (10 - 30)\%, if external information parameters is available.