Speaker
Description
The primordial power spectrum of matter density perturbations contains highly valuable information about new fundamental physics, in particular cosmological inflation, but is only very weakly constrained observationally for small cosmological scales k ≳ 3 Mpc^−1. In this talk, I will show how the formation of ultracompact minihalos in the early universe can help place significant constraints over a large range of such scales. I will begin with an overview of the formation and evolution of UCMHs, then present an updated compilation of observational bounds derived from various sources. Finally, I will discuss how constraints on the abundance of such objects can be translated into upper limits on the amplitude of primordial curvature perturbations
| Main Contribution topic | Cosmology Dark Matter |
|---|---|
| Secondary contribution topic | Indirect detection |