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GW Backgrounds associated with PBHs

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arxiv 2402.17388 v1 pith:E6GXHP32 submitted 2024-02-27 gr-qc astro-ph.COhep-ph

Guillem Domènech This is my paper · ORCID
classification gr-qcastro-ph.COhep-ph
keywords associatedbackgroundspbhsformationlargeprimordialanisotropicaspects
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PBH formation requires high-density regions in the (random) density field filling the primordial universe. While only the largest (and so rarest) overdensities collapse to form PBHs, the rest cause large anisotropic stresses, which are the source of GWs. We provide an overview of the theoretical aspects of the GW backgrounds associated with PBHs from large primordial fluctuations. We consider GW backgrounds associated with PBH formation, PBH reheating and unresolved PBH binaries. We present several graphical summaries and illustrations for the busy reader.

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Cited by 1 Pith paper

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    Soliton isocurvature perturbations produce gravitational waves whose sky anisotropies are enhanced by non-Gaussianity, offering a new probe of the early universe.

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