Temperature dependence of young's modulus for lithium ferrites

Novikov, Evgeny; Stel'mashenko, M. A.; Botaki, A. A.

doi:10.1007/bf00816824

Cited by 9 publications

(14 citation statements)

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“…The idea of the existence of PBHs [51] has recently regained popularity after they were suggested to be the progenitors (and to make up a sizeable fraction of the dark matter, see e.g. [52]) of the stellar mass black holes (∼ 30M ) detected by LIGO+VIRGO Collaboration [53].…”

Section: Introductionmentioning

confidence: 99%

Signatures of primordial black holes as seeds of supermassive black holes

Bernal

Raccanelli

Verde

et al. 2018

J. Cosmol. Astropart. Phys.

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It is broadly accepted that Supermassive Black Holes (SMBHs) are located in the centers of most massive galaxies, although there is still no convincing scenario for the origin of their massive seeds. It has been suggested that primordial black holes (PBHs) of masses 10 2 M may provide such seeds, which would grow to become SMBHs. We suggest an observational test to constrain this hypothesis: gas accretion around PBHs during the cosmic dark ages powers the emission of high energy photons which would modify the spin temperature as measured by 21cm Intensity Mapping (IM) observations. We model and compute their contribution to the standard sky-averaged signal and power spectrum of 21cm IM, accounting for its substructure and angular dependence for the first time. If PBHs exist, the sky-averaged 21cm IM signal in absorption would be higher, while we expect an increase in the power spectrum for 10 2 − 10 3 . We also forecast PBH detectability and measurement errors in the abundance and Eddington ratios for different fiducial parameter configurations for various future experiments, ranging from SKA to a futuristic radio array on the dark side of the Moon. While the SKA could provide a detection, only a more ambitious experiment would provide accurate measurements.

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Section: Introductionmentioning

confidence: 99%

Signatures of primordial black holes as seeds of supermassive black holes

Bernal

Raccanelli

Verde

et al. 2018

J. Cosmol. Astropart. Phys.

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“…Detection of PBHs would give dramatic confirmation of Hawking's hypothesis and theories positing early cosmological phase transitions (e.g., [68,69]), and enable studies that would likely yield deep insights into ultrahigh-energy physics as well as quantum gravity.…”

Section: Primordial Black Holes and Other Exoticamentioning

confidence: 78%

The Astrophysical Multimessenger Observatory Network (AMON)

Smith

Fox

Cowen

et al. 2013

Astroparticle Physics

114

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We summarize the science opportunity, design elements, current and projected partner observatories, and anticipated science returns of the Astrophysical Multimessenger Observatory Network (AMON). AMON will link multiple current and future high-energy, multimessenger, and follow-up observatories together into a single network, enabling near real-time coincidence searches for multimessenger astrophysical transients and their electromagnetic counterparts. Candidate and high-confidence multimessenger transient events will be identified, characterized, and distributed as AMON alerts within the network and to interested external observers, leading to follow-up observations across the electromagnetic spectrum. In this way, AMON aims to evoke the discovery of multimessenger transients from within observatory subthreshold data streams and facilitate the exploitation of these transients for purposes of astronomy and fundamental physics. As a central hub of global multimessenger science, AMON will also enable cross-collaboration analyses of archival datasets in search of rare or exotic astrophysical phenomena.Comment: 32 pages, 4 figure

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“…It has been shown in [61][62][63] that, at the final stage of the BH formation, the mass accretion follows the law…”

Section: Mass Spectrummentioning

confidence: 99%

Simulation of primordial black hole formation using pseudo-spectral methods

Escrivà

2020

Physics of the Dark Universe

100

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In this work we have used for the first time pseudo-spectral methods to perform numerical simulations of spherically symmetric black hole formations on a Friedman-Robertson-Walker universe. With these methods, the differential equations describing the gravitational collapse are partially solved algebraically. With our publicly available code we then independently check, and confirm, previous numerical estimations of the thresholds to form primordial black holes. By using an excision technique and analytical estimations of accretion rates, we were also able to estimate the black holes mass even in the case of large deviations from the threshold. There, we confirm, with an explicit example, that the estimation of the black hole mass via the self-similar scaling law is only accurate up to O(15%), for the largest allowed mass.

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Temperature dependence of young's modulus for lithium ferrites

Cited by 9 publications

References 0 publications

Signatures of primordial black holes as seeds of supermassive black holes

Signatures of primordial black holes as seeds of supermassive black holes

The Astrophysical Multimessenger Observatory Network (AMON)

Simulation of primordial black hole formation using pseudo-spectral methods

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