Entropy of the Universe and Hierarchical Dark Matter

TL;DR

This paper explores the hierarchical structure of primordial black holes as dark matter candidates and their implications for the universe's entropy, proposing a multi-tiered black hole model and discussing future observational prospects.

Contribution

It introduces a novel hierarchical model of primordial black holes as dark matter, linking different mass tiers to the universe's entropy and suggesting new observational avenues.

Findings

Hierarchical tiers of primordial black holes proposed

Implications for universe's entropy discussed

Future observations by Rubin Observatory and JWST considered

Abstract

We discuss the relationship between dark matter and the entropy of the universe with the premise that dark matter exists in the form of primordial black holes (PBHs) in a hierarchy of mass tiers. The lightest tier are intermediate-mass PIMBHs within galaxies including the Milky Way. Supermassive black holes at galactic centres are in the second tier. We are led to speculate that there exists a third tier of extremely massive PBHs, more massive than entire galaxies. We discuss future observations by the Rubin Observatory and James Webb Space Telescope.