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Memory burden effect mimics reheating signatures on SGWB from ultra-low mass PBH domination
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Ultra-low mass primordial black holes (PBH), briefly dominating the expansion of the universe, would leave detectable imprints in the secondary stochastic gravitational wave background (SGWB). Such a scenario leads to a characteristic doubly peaked spectrum of SGWB and strongly depends on the Hawking evaporation of such light PBHs. However, these observable signatures are significantly altered if the memory burden effect during the evaporation of PBHs is taken into account. We show that for the SGWB induced by PBH density fluctuations, the memory burden effects on the Hawking evaporation of ultra-low mass PBHs can mimic the signal arising due to the non-standard reheating epoch before PBH domination. Finally, we point out that this degeneracy can be broken by the simultaneous detection of the first peak in the SGWB, which is typically induced by the inflationary adiabatic perturbations.
Forward citations
Cited by 10 Pith papers
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Black Hole Memory Burden and its Signatures in Gravitational Waves from Mergers
Swift memory burden shifts black-hole quasinormal-mode frequencies by an amount set by the memory-load parameter μ and critical exponent p, with μ able to exceed the progenitor's information content.
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The fast, the slow and the merging: probes of evaporating memory burdened PBHs
Diffuse gamma-ray and neutrino data, plus CMB ionization limits, constrain the memory-burden parameters k, q, and delta for primordial black holes and narrow viable dark matter masses to a broad but testable window.
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Reconstructing Primordial Curvature Perturbations via Scalar-Induced Gravitational Waves with LISA
LISA can reconstruct the primordial curvature power spectrum from scalar-induced gravitational waves, with percent-level precision near the peak and Bayesian tests separating SIGWs from other sources.
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Axion misalignment with memory-burdened PBH
Axion dark matter parameter space shifts dramatically when kinetic misalignment and memory-burdened primordial black hole evaporation are combined.
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Impact of memory-burdened black holes on primordial gravitational waves in light of Pulsar Timing Array
Memory-burdened primordial black holes can explain pulsar timing array data as diluted blue-tilted gravitational waves and leave a testable high-frequency signal.
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Micro Black Hole Dark Matter
Micro black holes could survive as dark matter down to 10^{-5} Planck masses if extra dimensions or many species strengthen the memory-burden suppression of their evaporation.
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Enhancement of small-scale induced gravitational waves from the soliton/oscillon domination
Soliton or oscillon domination generates detectable induced gravitational waves, with spectra that constrain the lumps' lifetime, abundance, and separation.
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Relativistic accretion and burdened primordial black holes
Combining relativistic accretion with memory-burdened evaporation widens the parameter space for primordial black holes as dark matter and changes dark matter and dark radiation emission predictions.
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New bounds on Memory Burdened Primordial Black Holes from Big Bang Nucleosynthesis
Memory-burdened primordial black holes lighter than 10^9 grams are newly constrained by Big Bang nucleosynthesis, with a residual unconstrained window around 1-100 grams for suppression index k=2.
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Asymmetries from a charged memory-burdened PBH
A parameter-space scan shows that very large curvature-current couplings can fit the baryon asymmetry and dark matter abundance, while the electric charge of the black hole plays no role in the mechanism.
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