2 papers
astro-ph.CO2026
If at First You Don't Succeed, Trispectrum: I. Estimating the Matter Power Spectrum Covariance with Higher-Order Statistics
Samuel Goldstein, Kendrick M. Smith, Utkarsh Giri +1
We present a method to estimate non-Gaussian power spectrum covariance matrices by directly measuring the response of the small-scale power spectrum to long-wavelength perturbation…
astro-ph.CO2026
Constraining using the Large-Scale Modulation of Small-Scale Statistics
Utkarsh Giri, Moritz Münchmeyer, Kendrick M. Smith
We implement a novel formalism to constrain primordial non-Gaussianity of the local type from the large-scale modulation of the small-scale power spectrum. Our approach combines in…