The ineludible non-Gaussianity of the primordial black hole abundance
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00522516" target="_blank" >RIV/68378271:_____/19:00522516 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1088/1475-7516/2019/07/048" target="_blank" >https://doi.org/10.1088/1475-7516/2019/07/048</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2019/07/048" target="_blank" >10.1088/1475-7516/2019/07/048</a>
Alternative languages
Result language
angličtina
Original language name
The ineludible non-Gaussianity of the primordial black hole abundance
Original language description
We study the formation of primordial black holes when they are generated by the collapse of large overdensities in the early universe. Since the density contrast is related to the comoving curvature perturbation by a nonlinear relation, the overdensity statistics is unavoidably non-Gaussian. We show that the abundance of primordial black holes at formation may not be captured by a perturbative approach which retains the first few cumulants of the non-Gaussian probability distribution. We provide two techniques to calculate the non-Gaussian abundance of primordial black holes at formation, one based on peak theory and the other on threshold statistics. Our results show that the unavoidable non-Gaussian nature of the inhomogeneities in the energy density makes it harder to generate PBHs.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Cosmology, Gravity and the Dark Sector of the Universe</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Cosmology and Astroparticle Physics
ISSN
1475-7516
e-ISSN
—
Volume of the periodical
2019
Issue of the periodical within the volume
7
Country of publishing house
GB - UNITED KINGDOM
Number of pages
28
Pages from-to
1-28
UT code for WoS article
000478735300007
EID of the result in the Scopus database
2-s2.0-85072075541