The gravitational wave and radio signals of ultralight dark matter

TL;DR

This paper explores innovative methods using gravitational wave detectors and radio telescopes to detect ultralight axion dark matter through superradiance around black holes and resonant conversions near neutron stars and the Sun.

Contribution

It introduces new observational strategies for ultralight dark matter detection leveraging astrophysical phenomena and existing instruments.

Findings

Proposes gravitational wave signatures of ultralight dark matter.

Suggests radio signals from resonant conversions in magnetospheres.

Highlights potential for astrophysical observations to detect dark matter.

Abstract

We study the new approaches to explore the ultralight (axion) dark matter by gravitational wave experiments and radio telescope based on the superradiance process around Kerr black hole and the resonant conversion process in the magnetosphere of neutron star or the Sun.