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A topic review on probing primordial black hole dark matter with scalar induced gravitational waves
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Primordial black holes (PBHs) are supposed to form from the collapse of over-densed regions generated by large scalar curvature perturbations in the radiation dominated era. Despite decades of various independent observations, the nature of dark matter (DM) remains highly puzzling. Recently, PBH DM have aroused interest since they provide an attracting explanation to the merger events of binary black holes discovered by LIGO/VIRGO and may play an important role on DM. During the formation of PBH, gravitational waves will be sourced by linear scalar perturbations at second-order, known as the scalar-induced gravitational waves (SIGWs), which provides a new way to hunt for PBH DM. This topic review mainly focus on the physics about SIGWs accompanying the formation of PBH DM.
Forward citations
Cited by 9 Pith papers
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Observable Gravitational Wave Strain at Second Order
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Third-order scalar-tensor correlations suppress the induced gravitational wave background, and some of these new contributions diverge in the ultraviolet.
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Evading the CMB $\mu$-distortion bound on Supermassive Primordial Black Hole seeds with Non-Gaussian tails
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Circularly polarized gravitational waves from parity-violating scalar-tensor theory
In the "Qi-Xiu" parity-violating scalar-tensor theory, the L3 and L4 interactions leave linear gravitational-wave propagation GR-like but still generate circularly polarized scalar-induced gravitational waves.
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Gravitational Waves from Accretion Disks: Turbulence, Mode Excitation and Prospects for Future Detectors
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Scalar-induced gravitational waves from inflation with symmetry breaking
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Implications for Pulsar Timing Arrays of Sub-solar Black Hole Detections: From LVK to Einstein Telescope and Cosmic Explorer
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Tensor induced gravitational waves
Second-order tensor-induced gravitational waves can shift the inferred parameters of small-scale primordial gravitational wave models fitted to NANOGrav 15-year data, with one model favored by Bayes factors.
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Whispers from the Early Universe: The Ringdown of Primordial Black Holes
The stochastic gravitational wave background from primordial black hole ringdown could be observable by future pulsar timing arrays for solar-mass and heavier black holes, with binary merger signals within reach of ne...
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