Ultracompact minihalos associated with stellar-mass primordial black holes

Abstract

The possibility that primordial black hole binary mergers of stellar mass can explain the signals detected by the gravitational-wave interferometers has attracted much attention. In this scenario, primordial black holes can comprise only part of the entire dark matter, say, of order 0.1 %. This implies that most of the dark matter is accounted for by a different component, such as Weakly Interacting Massive Particles. We point out that in this situation, very compact dark matter minihalos, composed of the dominant component of the dark matter, are likely to be formed abundantly in the early Universe, with their formation redshift and abundance depending on primordial non-Gaussianity. They may be detected in future experiments via pulsar observations.

10 pages, 2 figures

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Cited by in corpus (12)

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• The Gravitational-Wave Physics II: Progress
• Primordial black holes from single-field inflation: a fine-tuning audit
• Primordial Black Hole Formation in Non-Minimal Curvaton Scenario
• Lensing constraints on ultradense dark matter halos
• Smooth vs instant inflationary transitions: steepest growth re-examined and primordial black holes
• Constraining axion and compact dark matter with interstellar medium heating
• Minihalos as probes of the inflationary spectrum: accurate boost factor calculation and new CMB constraints
• Fundamental Physics and Cosmology with TianQin
• Toward More Realistic Mass Functions For Ultradense Dark Matter Halos
• Non-Gaussianities and Primordial Black Holes
• Ultradense Dark Matter Halos with Poisson Noise from Stellar-Mass Primordial Black Holes