3 papers
astro-ph.CO2025
Robust μ-distortion constraints on primordial supermassive black holes from cubic (gNL) non-Gaussian perturbations
Xavier Pritchard, Christian T. Byrnes, Julien Lesgourgues +1
We make the first calculation of the spectral distortion constraints on the primordial curvature power spectrum in the limit of large cubic non-Gaussianity. This calculation involv…
astro-ph.CO2025
Stochastic inflation and non-perturbative power spectrum beyond slow roll
Devanshu Sharma
Stochastic inflation, together with the formalism, provides a powerful tool for estimating the large-scale behaviour of primordial fluctuations. In this work, we develop a nu…
astro-ph.CO2024
Robust -distortion constraints on primordial supermassive black holes from non-Gaussian perturbations
Christian T. Byrnes, Julien Lesgourgues, Devanshu Sharma
Explaining the origin of supermassive black holes via a primordial origin is severely challenged by the tight spectral distortion constraints on the amplitude of the primordial per…