Primordial Black Holes from Long-Range Scalar Forces and Scalar Radiative Cooling

Flores, Marcos M.; Kusenko, Alexander

doi:10.1103/physrevlett.126.041101

Cited by 70 publications

(62 citation statements)

References 83 publications

(89 reference statements)

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“…2π) 3 e ij q i q j T G (q)T G (|k − q|) , (199) where we used that in the Newtonian gauge we have E = β = 0. So when substituting (198) in (199) we conclude that for all gauges which satisfy (195) we have that…”

Section: Current "Solutions"mentioning

confidence: 99%

See 1 more Smart Citation

Scalar Induced Gravitational Waves Review

2021

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We provide a review on the state-of-the-art of gravitational waves induced by primordial fluctuations, so-called induced gravitational waves. We present the intuitive physics behind induced gravitational waves and we revisit and unify the general analytical formulation. We then present general formulas in a compact form, ready to be applied. This review places emphasis on the open possibility that the primordial universe experienced a different expansion history than the often assumed radiation dominated cosmology. We hope that anyone interested in the topic will become aware of current advances in the cosmology of induced gravitational waves, as well as becoming familiar with the calculations behind.

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Section: Current "Solutions"mentioning

confidence: 99%

“…Note that PBH could have formed by other mechanisms though. For example, PBH could form in first order phase transitions [191,192], tunneling during inflation [193], the collapse of Q-balls [194,195] and might also be the result of long range interactions stronger than gravity [196][197][198].…”

Section: Gws Induced By Primordial Fluctuationsmentioning

confidence: 99%

Scalar Induced Gravitational Waves Review

2021

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“…Actually, in [243], it was theorised that these structures could have collapsed and formed PBHs, but later on, it was realised that they should remain as virialised dark matter [244]. Precisely, in [245], it was shown that the radiative cooling due to the scalar radiation allows those halos to collapse into black holes. This was shown with a simple model with fermions interacting via the Yukawa interaction.…”

Section: Other Scenarios Of Pbh Formationmentioning

confidence: 99%

PBH Formation from Spherically Symmetric Hydrodynamical Perturbations: A Review

Escrivà

2022

Universe

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Primordial black holes, which could have been formed in the very early Universe due to the collapse of large curvature fluctuations, are currently one of the most attractive and fascinating research areas in cosmology for their possible theoretical and observational implications. This review article presents the current results and developments on the conditions for primordial black hole formation from the collapse of curvature fluctuations in spherical symmetry on a Friedman–Lemaître–Robertson–Walker background and its numerical simulation. We review the appropriate formalism for the conditions of primordial black hole formation, and we detail a numerical implementation. We then focus on different results regarding the threshold and the black hole mass using different sets of curvature fluctuations. Finally, we present the current state of analytical estimations for the primordial black hole formation threshold, contrasted with numerical simulations.

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“…If these micro-halos are stable over cosmological time scale, their annihilation signature at present epoch from the dense galactic center has been studied extensively [57]. But in our case situation is different for two reasons-a) The halos made of ψ particle gives away scalar radiation -in fact, it has been shown that scalar radiation from early halos favours PBH formation [58]. The remnant halos which do not form PBHs will be destroyed as the ψ particle decays into the radiation bath of Standard Model particle.…”

Section: A Primordial Black Holesmentioning

confidence: 83%

A Faster Growth of Perturbations in an Early Matter Dominated Epoch: Primordial Black Holes and Gravitational Waves

Das,

Maharana,

Muia

2021

Preprint

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We present a scenario for fast growth of cosmological perturbations; δ(t) ∼ a(t) s , a(t) being the scale factor, with 5 < s < 10 for the cases reported in this article. The basic ingredients of the scenario are an early matter dominated era and the dark fermion which experiences a scalar mediated force during the epoch. Both of these arise in string/supergravity models. The fast growth occurs for sub-horizon density perturbations of the dark fermion. The fast growth has a rich set of phenomenological implications. We outline implications for the formation of primordial black holes and the production of gravitational waves. Primordial black holes in the sub-lunar mass range (which are ideal dark matter candidates) can be produced. Gravitational waves can be produced in a wide range of frequencies due to second order scalar perturbations and due to evaporation and merger of primordial black holes.

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Primordial Black Holes from Long-Range Scalar Forces and Scalar Radiative Cooling

Cited by 70 publications

References 83 publications

Scalar Induced Gravitational Waves Review

Scalar Induced Gravitational Waves Review

PBH Formation from Spherically Symmetric Hydrodynamical Perturbations: A Review

A Faster Growth of Perturbations in an Early Matter Dominated Epoch: Primordial Black Holes and Gravitational Waves

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