Ringing Black Hole is Superradiant: Ultra-light Scalar Field

Abstract

Superradiance has been studied quite extensively in the context of static (charged) and rotating black hole spacetime. In this paper, we report for the first time that for a minimally coupled scalar field, the absorption cross-section of a Schwarzschild black hole in its ring down phase can be superradiant. Our present result opens up an intriguing possibility of observing the black hole merging phenomena through other fundamental fields.

A new section has been added on obsevables effects. Also, few typos are corrected and some references have been added. Accepted for publication in Phys. Rev. D

References in corpus (9)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• GW170608: Observation of a 19-solar-mass Binary Black Hole Coalescence
• Absorption of a massive scalar field by a charged black hole
• Massive and charged scalar field in Kerr-Newman spacetime: Absorption and superradiance
• Axion dark matter search using arm cavity transmitted beams of gravitational wave detectors
• Quantum superradiance on static black hole space-times
• Signals of Axion Like Dark Matter in Time Dependent Polarization of Light