Improved constraints from ultra-faint dwarf galaxies on primordial black holes as dark matter

@article{Stegmann2020ImprovedCF,
  title={Improved constraints from ultra-faint dwarf galaxies on primordial black holes as dark matter},
  author={Jakob Stegmann and Pedro R. Capelo and Elisa Bortolas and Lucio Mayer},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020}
}
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 black holes (PBHs) could also partially or entirely constitute the dark matter (DM) in our Universe. However, recent studies on PBHs in ultra-faint dwarf galaxies (UFDGs) suggest that they would dynamically heat up the stellar component due to two-body relaxation processes. From the comparison with the… 
View PDF on arXiv
16 Citations
Background Citations
4
Methods Citations
2

Figures and Tables from this paper

16 Citations

Constraints on primordial black holes

TLDR
The constraints on the fraction of the Universe that may have gone into primordial black holes (PBHs) over the mass range 10−5 to 1050 g are updated and even if PBHs make a small contribution to the DM, they could play an important cosmological role and provide a unique probe of the early Universe.

Eliminating the LIGO bounds on primordial black hole dark matter

Primordial black holes (PBHs) in the mass range (30–100) M⊙ are interesting candidates for dark matter but are tightly constrained by the LIGO merger rate. In deriving these constraints, PBHs were…

Primordial black holes as a dark matter candidate

The detection of gravitational waves from mergers of tens of Solar mass black hole binaries has led to a surge in interest in Primordial Black Holes (PBHs) as a dark matter candidate. We aim to…

The MUSE-Faint survey

Aims. It has been shown that the ultra-faint dwarf galaxy Eridanus 2 may host a stellar cluster in its centre. If this cluster is shown to exist, it can be used to set constraints on the mass and…

The Milky Way, coming into focus: Precision astrometry probes its evolution and its dark matter

Could the 2.6  M⊙ object in GW190814 be a primordial black hole?

On June 20, 2020, the LIGO-Virgo collaboration announced the discovery of GW190814, a gravitational wave event originating from a binary system merger between a black hole of mass $M_1 = 23.2^{+1.1}…

Generation of gravitational waves and tidal disruptions in clumpy galaxies

Obtaining a better understanding of intermediate-mass black holes (IMBHs) is crucial, as their properties could shed light on the origin and growth of their supermassive counterparts. Massive…

Primordial Black Holes as Dark Matter: Recent Developments

Primordial black holes (PBHs) could provide the dark matter but a variety of constraints restrict the possible mass windows to $10^{16}$ - $10^{17}\,$g, $10^{20}$ - $10^{24}\,$g and $10$ -…

The limits of cosmology: role of the Moon

  • J. Silk
  • Physics, Geology
    Philosophical Transactions of the Royal Society A
  • 2020
TLDR
A stable lunar platform will enable construction of telescopes that can access trillions of modes in the sky, providing the key to exploration of the authors' cosmic origins.

INTEGRAL constraints on primordial black holes and particle dark matter

The International Gamma-Ray Astrophysics Laboratory ($INTEGRAL$) satellite has yielded unprecedented measurements of the soft gamma-ray spectrum of our Galaxy. Here we use those measurements to set…

References

SHOWING 1-10 OF 86 REFERENCES

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…

The clustering of massive Primordial Black Holes as Dark Matter: measuring their mass distribution with Advanced LIGO

Gravitational waves from primordial black hole mergers

We study the production of primordial black hole (PBH) binaries and the resulting merger rate, accounting for an extended PBH mass function and the possibility of a clustered spatial distribution.…

Cosmic microwave background limits on accreting primordial black holes

Interest in the idea that primordial black holes (PBHs) might comprise some or all of the dark matter has recently been rekindled following LIGO’s first direct detection of a binary-black-hole…

CONSTRAINTS ON MACHO DARK MATTER FROM COMPACT STELLAR SYSTEMS IN ULTRA-FAINT DWARF GALAXIES

I show that a recently discovered star cluster near the center of the ultra-faint dwarf galaxy Eridanus II provides strong constraints on massive compact halo objects (MACHOs) of ≳5 M⊙ as the main…

Massive Primordial Black Holes as Dark Matter and their detection with Gravitational Waves

Massive Primordial Black Holes (MPBH) can be formed after inflation due to broad peaks in the primordial curvature power spectrum that collapse gravitationally during the radiation era, to form…

Limits on the Mass and Abundance of Primordial Black Holes from Quasar Gravitational Microlensing

The idea that dark matter can be made of intermediate-mass primordial black holes (PBHs) in the 10 M⊙ ≲ M ≲ 200 M⊙ range has recently been reconsidered, particularly in the light of the detection of…

Did LIGO Detect Dark Matter?

TLDR
It is considered that the black-hole (BH) binary detected by LIGO may be a signature of dark matter, and reasonable estimates span a range that overlaps the 2-53  Gpc^{-3} yr^{-1} rate estimated from GW150914, thus raising the possibility that LigO has detected PBH dark matter.

Microlensing constraints on primordial black holes with Subaru/HSC Andromeda observations

Primordial black holes (PBHs) have long been suggested as a viable candidate for the elusive dark matter. The abundance of such PBHs has been constrained using a number of astrophysical observations,…

Constraints from microlensing experiments on clustered primordial black holes

...