Did LIGO Detect Dark Matter?

@article{Bird2016DidLD,
  title={Did LIGO Detect Dark Matter?},
  author={Simeon Bird and Ilias Cholis and Julian B. Mu{\~n}oz and Yacine Ali-Ha{\"i}moud and Marc Kamionkowski and Ely D. Kovetz and Alvise Raccanelli and Adam G. Riess},
  journal={Physical review letters},
  year={2016},
  volume={116 20},
  pages={
          201301
        }
}
We consider the possibility that the black-hole (BH) binary detected by LIGO may be a signature of dark matter. Interestingly enough, there remains a window for masses 20M_{⊙}≲M_{bh}≲100M_{⊙} where primordial black holes (PBHs) may constitute the dark matter. If two BHs in a galactic halo pass sufficiently close, they radiate enough energy in gravitational waves to become gravitationally bound. The bound BHs will rapidly spiral inward due to the emission of gravitational radiation and… 

Figures from this paper

Lensing by primordial black holes: Constraints from gravitational wave observations
Primordial black holes (PBHs) have been proposed to explain at least a portion of dark matter. Observations have put strong constraints on PBHs in terms of the fraction of dark matter which they can
Primordial-black-hole mergers in dark-matter spikes
It has been suggested that primordial black holes (PBHs) of roughly 30 solar masses could make up the dark matter and if so, might account for the recent detections by LIGO involving binary black
Primordial Black Hole Dark Matter: LISA Serendipity.
TLDR
It is shown that, if these primordial black holes are the dark matter, LISA will be able to detect the associated GW power spectrum and the signal measured by LISA is a sum of the signal from a large number of independent sources suppressing the non-Gaussianity at detection to an unobservable level.
Primordial black holes as dark matter: constraints from compact ultra-faint dwarfs
The ground-breaking detections of gravitational waves from black hole mergers by LIGO have rekindled interest in primordial black holes (PBHs) and the possibility of dark matter being composed of
Improved constraints from ultra-faint dwarf galaxies on primordial black holes as dark matter
Soon after the recent first ever detection of gravitational waves from merging black holes it has been suggested that their origin is primordial. Appealingly, a sufficient number of primordial
Primordial black hole dark matter and the LIGO/Virgo observations
The LIGO/Virgo collaboration have by now detected the mergers of ten black hole binaries via the emission of gravitational radiation. The hypothesis that these black holes have formed during the
Waves from the centre: probing PBH and other macroscopic dark matter with LISA
A significant fraction of cosmological dark matter can be formed by very dense macroscopic objects, for example primordial black holes. Gravitational waves offer a promising way to probe these kinds
Disentangling the Potential Dark Matter Origin of LIGO’s Black Holes
The nature of dark matter (DM) remains one of the biggest open questions in physics. One intriguing DM candidate, primordial black holes (PBHs), has faced renewed interest following the Laser
Probing primordial–black-hole dark matter with scalar induced gravitational waves
The possibility that primordial black holes (PBHs) represent all of the dark matter (DM) in the Universe and explain the coalescences of binary black holes detected by LIGO/Virgo has attracted a lot
...
...

References

SHOWING 1-10 OF 71 REFERENCES
Lensing of Fast Radio Bursts as a Probe of Compact Dark Matter.
TLDR
It is shown that strong gravitational lensing of extragalactic fast radio bursts (FRBs) by MACHOs of masses larger than ∼20  M_{⊙} would result in repeated FRBs with an observable time delay, which should observe from tens to hundreds of repeated bursts yearly.
Galactic substructure and direct detection of dark matter
We study the effects of substructure in the Galactic halo on direct detection of dark matter, on searches for energetic neutrinos from weakly interacting massive particles (WIMP) annihilation in the
Effect of Primordial Black Holes on the Cosmic Microwave Background and Cosmological Parameter Estimates
We investigate the effect of nonevaporating primordial black holes (PBHs) on the ionization and thermal history of the universe. X-rays emitted by gas accretion onto PBHs modify the cosmic
Gravitational waves from scattering of stellar-mass black holes in galactic nuclei
Stellar-mass black holes (BHs) are expected to segregate and form a steep density cusp around supermassive black holes (SMBHs) in galactic nuclei. We follow the evolution of a multimass system of BHs
New cosmological constraints on primordial black holes
We update the constraints on the fraction of the Universe going into primordial black holes in the mass range 10{sup 9}-10{sup 17} g associated with the effects of their evaporations on big bang
GAMMA-RAY SIGNAL FROM EARTH-MASS DARK MATTER MICROHALOS
Earth-mass dark matter microhalos with a size of ~100 AU are the first structures formed in the universe, if the dark matter of the universe is made of neutralinos. Here, we report the results of
Constraints on the induced gravitational wave background from primordial black holes
We perform a consistent calculation of primordial black hole (PBH) mass spectrum and second-order induced gravitational wave (GW) background produced from primordial scalar perturbations in radiation
Gravitational Waves from Coalescing Black Hole MACHO Binaries
If MACHOs are black holes of mass ~0.5 M☉, they must have been formed in the early universe when the temperature was ~1 GeV. We estimate that in this case in our Galaxy's halo out to ~ 50 kpc there
THE DARK-MATTER FRACTION IN THE ELLIPTICAL GALAXY LENSING THE QUASAR PG 1115+080
We determine the most likely dark-matter fraction in the elliptical galaxy quadruply lensing the quasar PG 1115+080 based on analyses of the X-ray fluxes of the individual images in 2000 and 2008.
The mass function of dark matter haloes
We combine data from a number of N-body simulations to predict the abundance of dark haloes in cold dark matter (CDM) universes over more than four orders of magnitude in mass. A comparison of
...
...