Probing the Dark Matter density with gravitational waves from super-massive binary black holes

Jun 29, 2023
16 pages
Published in:
  • JCAP 02 (2024) 054
  • Published: Feb 28, 2024
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Abstract: (IOP)
Supermassive black hole binaries source gravitational waves measured by Pulsar Timing Arrays.The frequency spectrum of this stochastic background is predicted more precisely than its amplitude.We argue that Dark Matter friction can suppress the spectrum around nHz frequencies, where it is measured,allowing to derive robust and significant bounds on the Dark Matter density,which, in turn, controls indirect detection signals from galactic centers.A precise spectrum of gravitational waves would translate in a tomographyof the DM density profile, potentially probing DM particle-physics effects that induce a characteristic DM density profile,such as DM annihilations or de Broglie wavelength.
Note:
  • dark matter theory
  • gravitational waves / theory
  • gravitational waves / sources
  • massive black holes
  • dark matter: density
  • black hole: binary
  • dark matter: annihilation
  • gravitational radiation: spectrum
  • frequency: spectrum
  • background: stochastic