Causal horizons and topics in structure formation

TL;DR

This paper discusses the nature of horizons in black holes and cosmology, and explores structure formation processes like dark matter virialization and primordial black hole creation across different cosmic epochs.

Contribution

It provides an updated overview of horizon properties and examines specific formation mechanisms of structures such as dark matter virialization and primordial black holes.

Findings

Analysis of black hole and cosmological horizons under general conditions.

Insights into dark matter virialization during matter era.

Discussion of primordial black hole formation during the radiative era.

Abstract

This is a write-up of a talk given at the Opava RAGtime meeting in 2011, but it has been updated to include some subsequent related developments. The talk focused on discussion of some aspects of black hole and cosmological horizons under rather general circumstances, and on two different topics related to formation of cosmological structures at different epochs of the universe: virialization of cold dark matter during standard structure formation in the matter-dominated era, and primordial black hole formation during the radiative era.