Formation of MACHO-Primordial Black Holes in Inflationary Cosmology

TL;DR

This paper proposes a model within inflationary cosmology that generates primordial black holes of specific masses through isocurvature fluctuations, offering a potential explanation for massive compact halo objects.

Contribution

It introduces a novel inflationary model with multiple scalar fields that produces the necessary density fluctuations for primordial black hole formation at targeted mass scales.

Findings

Predicts formation of primordial black holes at desired mass scales

Uses isocurvature fluctuations generated during inflation

Provides a phenomenological framework for PBH formation

Abstract

As a nonbaryonic explanation of massive compact halo objects, a phenomenological model is presented which predicts formation of primordial black holes at a desired mass scale. The required feature of initial density fluctuation is realized making use of the primordially isocurvature fluctuation generated in an inflationary universe model with multiple scalar fields.