Light Primordial Exotic Compact Objects as All Dark Matter

Abstract

The radiation emitted by horizonless exotic compact objects (ECOs), such as wormholes, 2-2-holes, fuzzballs, gravastars, boson stars, collapsed polymers, superspinars etc., is expected to be strongly suppressed when compared to the radiation of black holes. If large primordial curvature fluctuations collapse into such objects instead of black holes, they do not evaporate or evaporate much slower than black holes and could thus constitute all of the dark matter with masses below $M<10^{-16}{M}_{\odot }.$ We reevaluate the relevant experimental constraints for light ECOs in this mass range and show that very large new parameter space down to ECO masses $M\sim 10\mathrm{TeV}$ opens up for light primordial dark matter. A new dedicated experimental program is needed to test this mass range of primordial dark matter.

6 pages, 2 figures; minor changes to match the published version

References in corpus (14)

• Limits on the Macho Content of the Galactic Halo from the EROS-2 Survey of the Magellanic Clouds
• Echoes of ECOs: gravitational-wave signatures of exotic compact objects and of quantum corrections at the horizon scale
• Cosmic microwave background limits on accreting primordial black holes
• The merger rate of primordial-black-hole binaries
• Tests for the existence of horizons through gravitational wave echoes
• Wormholes as Black Hole Foils
• Cosmological constraints on exotic injection of electromagnetic energy
• Fate of gravitational collapse in semiclassical gravity
• Generalised constraints on the curvature perturbation from primordial black holes
• The end of the MACHO era- revisited: new limits on MACHO masses from halo wide binaries
• Primordial black holes from inflaton and spectator field perturbations in a matter-dominated era
• Macroscopic Effects of the Quantum Trace Anomaly
• The Spectrum of the Universe
• Supermassive black holes or boson stars? Hair counting with gravitational wave detectors

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• Constraining Primordial Black Holes with the EDGES 21-cm Absorption Signal
• Echoes of compact objects: new physics near the surface and matter at a distance
• Stability of rotating scalar boson stars with nonlinear interactions
• Prospects for probing gravitational waves from primordial black hole binaries
• Small-scale structure of primordial black hole dark matter and its implications for accretion
• PBH remnants as dark matter produced in thermal, matter and runaway-quintessence post-inflationary scenarios
• Dimensional Transmutation in Gravity and Cosmology
• Light rings and long-lived modes in quasi-black hole spacetimes
• Compact Dark Matter Objects via $N$ Dark Sectors
• Not quite black holes as dark matter
• Logarithmic terms in entropy of Schwarzschild black holes in higher loops
• Horizonless ultracompact objects and dark matter in quadratic gravity
• Constraints on primordial black hole dark matter from Galactic center X-ray observations
• Primordial gravastar from inflation
• Primordial black holes: constraints, potential evidence and prospects
• Microlensing and event rate of static spherically symmetric wormhole