Production of high stellar-mass primordial black holes in trapped inflation

Cheng, Shu-Lin; Lee, Wolung; Ng, Kin-Wang

doi:10.1007/jhep02(2017)008

Cited by 51 publications

(43 citation statements)

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“…The log-normal parametrization includes sharp peaks where ∆ 1 [95,[235][236][237][238][239][240][241][242][243] and broad peaks where ∆ 1 [62,85,102,128,238,[244][245][246][247][248][249][250][251][252][253][254][255]. For ∆ → 0 we recover the Dirac delta case.…”

Section: Log-normal Peakmentioning

confidence: 99%

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: Log-normal Peakmentioning

confidence: 99%

Scalar Induced Gravitational Waves Review

2021

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“…As previously discussed in the last paragraph of Section 6.1, some of these inflation models predict solar mass and larger primordial BHs that may be produced as a by-product of inflation. Inflation itself, in addition to the production of primordial BHs, both contribute to a potential GW background signal (e. g. Cheng et al 2017;García-Bellido et al 2016). The peak frequency of the bump that can be produced in the GW background spectrum depends on the primordial BH mass, and the 10-100 solar masses range precisely maps into the nanohertz GW band (García-Bellido et al 2017).…”

Section: Primordial Black Holesmentioning

confidence: 99%

The astrophysics of nanohertz gravitational waves

Burke-Spolaor

Taylor

Charisi

et al. 2019

Astron Astrophys Rev

280

185

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Pulsar timing array (PTA) collaborations in North America, Australia, and Europe, have been exploiting the exquisite timing precision of millisecond pulsars over decades of observations to search for correlated timing deviations induced by gravitational waves (GWs). PTAs are sensitive to the frequency band ranging just below 1 nanohertz to a few tens of microhertz. The discovery space of this band is potentially rich with populations of inspiraling supermassive black-holes binaries, decaying cosmic string networks, relic postinflation GWs, and even non-GW imprints of axionic dark matter.This article aims to provide an understanding of the exciting open science questions in cosmology, galaxy evolution, and fundamental physics that will be addressed by the detection and study of GWs through PTAs. The focus of the article is on providing an understanding of the mechanisms by which PTAs can address specific questions in these fields, and to outline some of the subtleties and difficulties in each case. The material included is weighted most heavily towards the questions which we expect will be answered in the near-term with PTAs; however, we have made efforts to include most currently anticipated applications of nanohertz GWs.PACS numbers: § Note, a more precise remark is that the Earth and pulsar terms are not correlated as long as two pulsars are separated by many gravitational wavelengths, that is to say that f L 1, where f is the GW frequency and L is distance to the pulsar. This assumption is called the short-wavelength approximation (e. g. Mingarelli & Mingarelli 2018).

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“…Such a peak in the curvature perturbation is possible in some inflation models, which has attracted much attention recently [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55]. It is also well known that the large scalar perturbation can induce large tensor perturbations since they are coupled at the nonlinear order.…”

Section: Introductionmentioning

confidence: 99%

Pulsar timing array constraints on the induced gravitational waves

Cai

Wang

et al. 2019

J. Cosmol. Astropart. Phys.

104

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If the black holes detected by LIGO/VIRGO are primordial black holes (PBHs) sourcing from a large primordial curvature perturbation at small scales, the corresponding induced gravitational waves (GWs) would peak at nanohertz that is detectable by the current and future observations of pulsar timing array (PTA). In this paper we show that with the mass function estimated from the merger rate of LIGO O1 and O2 events, the induced GWs from such a curvature perturbation with a Gaussian narrow peak at some small scale would be in a seemingly mild tension with current constraints from PTA. However, if the curvature perturbation is of local-type non-Gaussianity with a non-linear parameter f NL O(10), the tension could be relieved. Nevertheless, such an induced GWs must be detectable by the Square Kilometer Array in a decade or less.

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Production of high stellar-mass primordial black holes in trapped inflation

Cited by 51 publications

References 50 publications

Scalar Induced Gravitational Waves Review

Scalar Induced Gravitational Waves Review

The astrophysics of nanohertz gravitational waves

Pulsar timing array constraints on the induced gravitational waves

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