Large power spectrum and primordial black holes in the effective theory of inflation
Sign Up to like & getrecommendations! Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep01(2022)074
Abstract: We study the generation of a large power spectrum, necessary for primordial black hole formation, within the effective theory of single-field inflation. The mechanisms we consider include a transition into a ghost-inflation-like phase and scenarios… read more here.
Keywords: large power; power spectrum; inflation; power ... See more keywords
Quantum formation of primordial black holes
Sign Up to like & getrecommendations! Published in 2019 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-019-2587-1
Abstract: We provide a (simplified) quantum description of primordial black holes at the time of their formation. Specifically, we employ the horizon quantum mechanics to compute the probability of black hole formation starting from a simple… read more here.
Keywords: primordial black; quantum formation; black holes; formation primordial ... See more keywords
Primordial black holes and secondary gravitational waves from natural inflation
Sign Up to like & getrecommendations! Published in 2021 at "Nuclear Physics B"
DOI: 10.1016/j.nuclphysb.2021.115480
Abstract: The production of primordial black hole (PBH) dark matter (DM) and the generation of scalar induced secondary gravitational waves by using the enhancement mechanism with a peak function in the noncanonical kinetic term in natural… read more here.
Keywords: gravitational waves; black holes; secondary gravitational; holes secondary ... See more keywords
Primordial black holes could hold the key to dark matter mysteries
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2211215119
Abstract: As far back as the 1930s, astronomers began to suspect that every galaxy and every cluster of galaxies was surrounded by a massive haze of “dark matter”—an utterly invisible ectoplasm that held these photogenic yet… read more here.
Keywords: matter; primordial black; holes could; dark matter ... See more keywords
Exploring the parameter space of modified supergravity for double inflation and primordial black hole formation
Sign Up to like & getrecommendations! Published in 2021 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ac3bd9
Abstract: We study the parameter space of the effective (with two scalars) models of cosmological inflation and primordial black hole (PBH) formation in the modified (R+ R 2) supergravity. Our models describe double inflation, whose first… read more here.
Keywords: formation; primordial black; parameter space; inflation primordial ... See more keywords
Primordial black holes from string inflation
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/06/034
Abstract: We present a single-field string inflationary model which allows for the generation of primordial black holes in the low mass region where they can account for a significant fraction of the dark matter abundance. The… read more here.
Keywords: holes string; black holes; cosmology; primordial black ... See more keywords
Mechanisms for Primordial Black Hole Production in String Theory
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/07/005
Abstract: We consider mechanisms for producing a significant population of primordial black holes (PBHs) within string inspired single field models of inflation. The production of PBHs requires a large amplification in the power spectrum of curvature… read more here.
Keywords: slow roll; production; primordial black; models inflation ... See more keywords
Distribution of primordial black holes and 21cm signature
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/11/041
Abstract: We show that the number of primordial black holes (PBHs) which is originated from primordial density perturbations with moderately-tilted power spectrum fluctuates following the log-normal distribution, while it follows the Poisson distribution if the spectrum… read more here.
Keywords: black holes; primordial black; holes 21cm; distribution primordial ... See more keywords
Femtolensing by dark matter revisited
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/12/005
Abstract: Femtolensing of gamma ray bursts (GRBs) has been put forward as an exciting possibility to probe exotic astrophysical objects with masses below 10−13 solar masses such as small primordial black holes or ultra-compact dark matter… read more here.
Keywords: femtolensing dark; matter revisited; matter; dark matter ... See more keywords
Primordial black holes from Affleck-Dine mechanism
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/01/027
Abstract: The recent observations of the gravitational waves (GWs) by LIGO-Virgo collaboration infer the increasing possibility of the primordial black holes (PBHs). Recently it was pointed out that sufficient PBHs are produced by the Affleck-Dine mechanism… read more here.
Keywords: primordial black; dine mechanism; black holes; affleck dine ... See more keywords
Multi-wavelength astronomical searches for primordial black holes
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/06/026
Abstract: If primordial black holes of $\mathcal{O}(1-100) M_{\odot}$ constitute a significant portion of the dark matter in the Universe, they should be very abundant in our Galaxy. We present here a detailed analysis of the radio… read more here.
Keywords: wavelength astronomical; black holes; multi wavelength; astronomical searches ... See more keywords