Regular primordial black holes can evaporate completely like singular ones and yield the observed dark matter density under modified cosmological constraints.
On a regular modified Schwarzschild spacetime
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abstract
A modified version of the Schwarzschild geometry is proposed. The source of curvature comes from an anisotropic fluid with $p_{r} = -\rho$ and fluctuating tangential pressures. The event horizon has zero surface gravity but the invariant acceleration of a static observer is finite there. The Tolman - Komar energy of the gravitational fluid changes sign on the horizon, equals the black hole mass at infinity and is vanishing at $r = 0$. There is a nonzero surface stress tensor on the horizon due to a jump of the extrinsic curvature. Near-horizon geometry resembles the Robinson - Bertotti metric and not the Rindler metric which corresponds to the standard Schwarzschild spacetime. The modified metric has no signature flip when the horizon is crossed and all physical parameters are finite throughout the spacetime.
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2025 2verdicts
UNVERDICTED 2representative citing papers
Numerical study finds that a deviation parameter in a regular black hole with Minkowski core produces phase shifts and amplitude changes in kludge waveforms from periodic orbits, making them distinguishable from Schwarzschild for larger deviations and certain orbit types.
citing papers explorer
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Dark matter production from evaporation of regular primordial black holes
Regular primordial black holes can evaporate completely like singular ones and yield the observed dark matter density under modified cosmological constraints.
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Gravitational waveforms from periodic orbits around a novel regular black hole
Numerical study finds that a deviation parameter in a regular black hole with Minkowski core produces phase shifts and amplitude changes in kludge waveforms from periodic orbits, making them distinguishable from Schwarzschild for larger deviations and certain orbit types.