Feasibility of Primordial Black Hole Remnants as Dark Matter in View of Hawking Radiation Recoil

Abstract

It has recently been suggested that black hole remnants of primordial origin are not a viable dark matter candidate since they would have far too large a velocity due to the recoil of Hawking radiation. We re-examined this interesting claim in more details and found that it does not rule out such a possibility. On the contrary, for models based on non-commutativity of spacetime near the Planck scale, essentially the same argument can be used to estimate the scale at which non-commutativity effect becomes important. If dark matter "particles" are non-commutative black holes that have passed the maximum temperature, this implies that the non-commutative scale is about 100 times the Planck length. The same analysis applies to other black hole remnants whose temperature reaches a maximum before cooling off, for example, black holes in asymptotically safe gravity.

published version

References in corpus (18)

• Primordial Black Holes as Dark Matter: Recent Developments
• Primordial Black Holes as a dark matter candidate
• Primordial black hole dark matter from single field inflation
• NANOGrav Hints to Primordial Black Holes as Dark Matter
• Spacetime Structure of an Evaporating Black Hole in Quantum Gravity
• Did NANOGrav see a signal from primordial black hole formation?
• Charged rotating noncommutative black holes
• Generating PBHs and small-scale GWs in two-field models of inflation
• Black Holes and WIMPs: All or Nothing or Something Else
• Black Holes, Information, and Hilbert Space for Quantum Gravity
• Primordial Black Holes Arise When The Inflaton Falls
• Constraints on a mixed model of dark matter particles and primordial black holes from the Galactic 511 keV line
• Constraining primordial black holes as dark matter at JUNO
• Reconstruction of Primordial Power Spectrum of curvature perturbation from the merger rate of Primordial Black Hole Binaries
• NANOGrav Hints on Planet-Mass Primordial Black Holes
• Shining Primordial Black Holes
• String Theory, Space-Time Non-Commutativity and Structure Formation
• Space-time: Commutative or noncommutative ?

Cited by in corpus (5)

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