What Is The Probability And Consequences Of Collision Of Primordial Black Holes With Earth? (Cosmology)

Sohrab Rahvar investigated the scenario of collision of primordial black holes (PBHs) with earth. He showed that this collision has different consequences as heating the interior of the earth through dynamical friction and accretion processes. The findings of this study recently appeared in Arxiv. Primordial black holes are a hypothetical type of black hole that formed … Continue reading What Is The Probability And Consequences Of Collision Of Primordial Black Holes With Earth? (Cosmology)

How Production Of Primordial Black Holes Take Place In NonMinimal Derivative Coupling Inflation? (Cosmology / Quantum)

Heydari and Karami investigated the generation of Primordial Black Holes (PBHs) with the aid of gravitationally increased friction mechanism originated from the NonMinimal field Derivative Coupling (NMDC) to gravity framework, with the quartic potential. By assigning a coupling parameter as a two-parted function of inflation field and fine-tuning of 4 parameter cases of the model … Continue reading How Production Of Primordial Black Holes Take Place In NonMinimal Derivative Coupling Inflation? (Cosmology / Quantum)

How Primordial Black Holes Production Take Place In Alpha-attractor Galileon Inflationary Scenario? (Cosmology)

As we have already seen before, there are several inflation models which discuss the possibility of the production of primordial black holes in inflation process of the early universe. But, the production of PBHs requires the violation of slow-roll condition. For this reason, slow-roll violating models become an interesting alternative, including ultra-slow-roll (USR) inflation, inflation … Continue reading How Primordial Black Holes Production Take Place In Alpha-attractor Galileon Inflationary Scenario? (Cosmology)

Which Formation Mechanism Show Strong Clustering of Primordial Black Holes? (Cosmology)

Masahiro Kawasaki and colleagues investigated the clustering of primordial black holes (PBHs) formed by Affleck-Dine (AD) baryogenesis. They found that formed PBHs showed strong clustering due to stochastic dynamics of the AD field. Their study recently appeared in Arxiv. In recent years, the LIGO-Virgo collaboration has detected gravitational waves emitted by merging binary black holes, … Continue reading Which Formation Mechanism Show Strong Clustering of Primordial Black Holes? (Cosmology)

What Will Be The Minimum Testable Value of Abundance of Primordial Black Holes by Future GW Experiments? (Cosmology)

Recent detection of gravitational waves (GWs) by Advanced LIGO/VIRGO from black holes mergers raise the possibility that primordial black holes (PBHs) may contain a significant amount of dark matter in the universe. In particular, Gabriele and colleagues recently found evidence for primordial black holes in LIGO/VIRGO GW-data and suggested that, we can confirm the primordial nature of … Continue reading What Will Be The Minimum Testable Value of Abundance of Primordial Black Holes by Future GW Experiments? (Cosmology)

Primordial Black Holes Give Rise To Mu-Distortion Which Can Be Detected By Future Observations (Cosmology)

If you are a daily reader, you may have came across several articles on our website based on the formation of primordial black holes (PBHs). But, the most popular and natural scenario is, production of PBHs by the collapse of the clumps. In this scenario, PBHs production takes place by the collapse of large overdense … Continue reading Primordial Black Holes Give Rise To Mu-Distortion Which Can Be Detected By Future Observations (Cosmology)

These Next-generation Experiments Can Confirm Existence Of Primordial Black Hole (Astronomy)

Valentina De Romeri and colleagues investigated the possibility of detection of neutrinos from evaporating PBHs with future neutrino experiments. They found that, next-generation neutrino experiments like DUNE and THEIA will be able to detect neutrinos from evaporating PBHs and will provide relevant information on the nature of dark matter (DM). Their study recently appeared in … Continue reading These Next-generation Experiments Can Confirm Existence Of Primordial Black Hole (Astronomy)

How Primordial Black Holes Forms From Inflation With Solo or Multiple Bumps? (Cosmology / Quantum Physics)

Ruifeng Zheng and colleagues investigated the formation of primordial black holes (PBHs) from inflation model with bumpy potential, which has multiple bumps. They found that, the potential can give rise to power spectrum with single or multiple peaks in small scales, which can in turn predict the production of primordial black holes. Their study recently … Continue reading How Primordial Black Holes Forms From Inflation With Solo or Multiple Bumps? (Cosmology / Quantum Physics)

What Will Be The Spins of Primordial Black Holes Formed In Different Cosmological Scenarios? (Cosmology)

Primordial black holes (PBHs) are a hypothetical type of black hole that formed soon after the Big Bang. These are plausible dark matter candidates and are also good candidates for being the seeds of the supermassive black holes at the center of massive galaxies, as well as of intermediate-mass black holes. There are different scenarios for the formation of PBHs. One can classify them … Continue reading What Will Be The Spins of Primordial Black Holes Formed In Different Cosmological Scenarios? (Cosmology)