Search for small-mass black-hole dark matter with space-based gravitational wave detectors

Naoki Seto, Asantha Cooray
2004 Physical Review D  
The high sensitivity of upcoming space-based gravitational wave detectors suggests the possibility that if halo dark matter were composed of primordial black holes (PBHs) with mass between 10^16 g and 10^20 g, the gravitational interaction with detector test masses will lead to a detectable pulse-like signal during the fly-by. For an improved version of the Laser Interferometer Space Antenna with a reduced acceleration noise at the low-end of its frequency spectrum, we find an event rate, with
more » ... ignal-to-noise ratios greater than 5, of ∼ a few per decade involving black holes of mass ∼ 10^17 g. The detection rate improves significantly for second generation space based interferometers that are currently envisioned, though these events must be distinguished from those involving perturbations due to near-Earth asteroids. While the presence of primordial black holes below a mass of ∼ 10^16 g is now constrained based on the radiation released during their evaporation, the gravitational wave detectors will extend the study of PBHs to a several orders of magnitude higher masses.
doi:10.1103/physrevd.70.063512 fatcat:wzn3rqcv7bcynliqmewedd4xri