2 papers
gr-qc2026
The trichotomy of primordial black holes initial conditions
Cristiano Germani, Laia MontellÃ
We show that the threshold to form a black hole, in an asymptotically flat and radiation-dominated Friedman-Robertson-Walker (FRW) Universe, is not solely (mainly) determined by th…
astro-ph.CO2025
Unexpected shape of the primordial black hole mass function
Jacopo Fumagalli, Jaume Garriga, Cristiano Germani +1
In a Universe with nearly-Gaussian initial curvature perturbations, the abundance of primordial black holes can be derived from the curvature power spectrum. When the latter is enh…