Work

All Dark Matter as Primordial Black Holes: a Gravitational-Wave Test

Year: 2026

Type: preprint

Abstract: We propose a novel test for the hypothesis that the dark matter of the Universe is composed entirely by asteroidal-mass primordial black holes. It relies on detecting the stochastic gravitational-wave background generated by the coalescence onto rapidly spinning supermassive astrophysical black holes of the light primordial black holes accumulated in spherically symmetric spikes. We discuss the scenarios in which the signal can be observed by the future space-based gravitational-wave observatories LISA and DECIGO.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.36177

Authors: Ianniccari, A., Iovino, A. J., Perna, G., Perrone, D., Riotto, A.

Institutions: University of Geneva, New York University Abu Dhabi, National Institute of Chemical Physics and Biophysics, University of Copenhagen

Language: English

Topic: Pulsars and Gravitational Waves Research

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: New York University Abu Dhabi, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Danmarks Grundforskningsfond, Eesti Teadusagentuur, Tamkeen

Awards: G2693235065, G296744003, Physics of primordial black holes from formation to the present, Probing the early Universe with Scalar-Induced Gravitational Waves, G4473005422, European Organisation for Nuclear Research, GW-Learn: Deciphering the Gravitation-Wave Universe using the Next-Generation Observatories and Machine Learning, European Space Agency, G7821892606

OpenAlex ID: W7224131154

Cites: 23

Cited by:

Related to: 10