Fully relativistic predictions in Horndeski gravity from standard Newtonian N-body simulations
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00554627" target="_blank" >RIV/68378271:_____/21:00554627 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1088/1475-7516/2021/09/024" target="_blank" >https://doi.org/10.1088/1475-7516/2021/09/024</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2021/09/024" target="_blank" >10.1088/1475-7516/2021/09/024</a>
Alternative languages
Result language
angličtina
Original language name
Fully relativistic predictions in Horndeski gravity from standard Newtonian N-body simulations
Original language description
The N-body gauge allows the introduction of relativistic effects in Newtonian cosmological simulations. Here we extend this framework to general Horndeski gravity theories, and investigate the relativistic effects that the scalar field introduces in the matter power spectrum at intermediate and large scales. In particular, we show that the kineticity function at these scales enhances the amplitude of the signal of contributions coming from the extra degree of freedom. Using the Quasi-Static Approximation (QSA), we separate modified gravity effects into two parts: one that only affects small-scale physics, and one that is due to relativistic effects. This allows our formalism to be readily implemented in modified gravity N-body codes in a straightforward manner, e.g., relativistic effects can be included as an additional linear density field in simulations.
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
10303 - Particles and field physics
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
2021
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
1475-7516
Volume of the periodical
9
Issue of the periodical within the volume
Sep.
Country of publishing house
GB - UNITED KINGDOM
Number of pages
28
Pages from-to
024
UT code for WoS article
000707382900024
EID of the result in the Scopus database
2-s2.0-85116081178