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What Fraction of the Currently Observed GW Events Can Be Ascribed to PBHs?by@phenomenology

What Fraction of the Currently Observed GW Events Can Be Ascribed to PBHs?

by Phenomenology Technology
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Phenomenology Technology

@phenomenology

Phenomenology explores the depths of consciousness, fostering a deeper understanding...

August 29th, 2024
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Determining how many observed gravitational wave events are caused by primordial black holes (PBHs) is still uncertain. This section explores the ongoing research and challenges in verifying the contribution of PBHs to these cosmic events.
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Academic Research Paper

Academic Research Paper

Part of HackerNoon's growing list of open-source research papers, promoting free access to academic material.

Authors:

(1) Antonio Riotto, Département de Physique Theorique, Universite de Geneve, 24 quai Ansermet, CH-1211 Geneve 4, Switzerland and Gravitational Wave Science Center (GWSC), Universite de Geneve, CH-1211 Geneva, Switzerland;

(2) Joe Silk, Institut d’Astrophysique, UMR 7095 CNRS, Sorbonne Universite, 98bis Bd Arago, 75014 Paris, France, Department of Physics and Astronomy, The Johns Hopkins University, Baltimore MD 21218, USA, and Beecroft Institute of Particle Astrophysics and Cosmology, Department of Physics, University of Oxford, Oxford OX1 3RH, UK.

Abstract and 1 Introduction

2 Some open questions

2.1 What is the abundance of PBHs?

2.2 What is the effect of PBH clustering?

2.3 What fraction of the currently observed GW events can be ascribed to PBHs?

2.4 Are PBHs the Dark Matter?

3 The PBH Roadmap

3.1 High redshift mergers

3.2 Sub-solar PBHs

3.3 Plugging the pair instability gap with PBH?

3.4 PBH eccentricity, 3.5 PBH spin and 3.6 Future gamma-ray telescopes

4 Conclusions and References

2.3 What fraction of the currently observed GW events can be ascribed to PBHs?

Thanks to the many binary BH events detected so far with many more expected in the next few years, gravitational-wave astronomy is about to become a population study. Currently hierarchical Bayesian analysis combining astrophysical formation models and PBHs may only constrain the fraction of a putative subpopulation of PBHs in the data (see for instance Ref. [13]). The exciting possibility that PBHs are contributing to current observations will be verified only by further reducing uncertainties in astrophysical and primordial formation models. This is another fundamental open issue.


This paper is available on arxiv under CC BY 4.0 DEED license.


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