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Evolution of density and velocity profiles of matter in large voids

Evolution of density and velocity profiles of matter in large voids

We analyse the evolution of cosmological perturbations which leads to the formation of large voids in the distribution of galaxies. We assume that perturbations are spherical and all components of the Universe - radiation, matter and dark energy - are continuous media with ideal fluid energy-momentu...

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Main Authors: Tsizh, M., Novosyadlyj, B.
Format: Article
Language:English
Published: Головна астрономічна обсерваторія НАН України 2016
Series:Advances in Astronomy and Space Physics
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/119947
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spelling irk-123456789-1199472017-06-11T03:03:14Z Evolution of density and velocity profiles of matter in large voids Tsizh, M. Novosyadlyj, B. We analyse the evolution of cosmological perturbations which leads to the formation of large voids in the distribution of galaxies. We assume that perturbations are spherical and all components of the Universe - radiation, matter and dark energy - are continuous media with ideal fluid energy-momentum tensors, which interact only gravitationally. Equations of the evolution of perturbations in the comoving to cosmological background reference frame for every component are obtained from equations of conservation and Einstein's ones and are integrated by modified Euler method. Initial conditions are set at the early stage of evolution in the radiation-dominated epoch, when the scale of perturbation is mush larger than the particle horizon. Results show how the profiles of density and velocity of matter in spherical voids with different overdensity shells are formed 2016 Article Evolution of density and velocity profiles of matter in large voids / M. Tsizh, B. Novosyadlyj // Advances in Astronomy and Space Physics. — 2016. — Т. 6., вип. 1. — С. 28-33. — Бібліогр.: 8 назв. — англ. 2227-1481 DOI:10.17721/2227-1481.6.28-33 http://dspace.nbuv.gov.ua/handle/123456789/119947 en Advances in Astronomy and Space Physics Головна астрономічна обсерваторія НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
description We analyse the evolution of cosmological perturbations which leads to the formation of large voids in the distribution of galaxies. We assume that perturbations are spherical and all components of the Universe - radiation, matter and dark energy - are continuous media with ideal fluid energy-momentum tensors, which interact only gravitationally. Equations of the evolution of perturbations in the comoving to cosmological background reference frame for every component are obtained from equations of conservation and Einstein's ones and are integrated by modified Euler method. Initial conditions are set at the early stage of evolution in the radiation-dominated epoch, when the scale of perturbation is mush larger than the particle horizon. Results show how the profiles of density and velocity of matter in spherical voids with different overdensity shells are formed
format Article
author Tsizh, M.
Novosyadlyj, B.
spellingShingle Tsizh, M.
Novosyadlyj, B.
Evolution of density and velocity profiles of matter in large voids
Advances in Astronomy and Space Physics
author_facet Tsizh, M.
Novosyadlyj, B.
author_sort Tsizh, M.
title Evolution of density and velocity profiles of matter in large voids
title_short Evolution of density and velocity profiles of matter in large voids
title_full Evolution of density and velocity profiles of matter in large voids
title_fullStr Evolution of density and velocity profiles of matter in large voids
title_full_unstemmed Evolution of density and velocity profiles of matter in large voids
title_sort evolution of density and velocity profiles of matter in large voids
publisher Головна астрономічна обсерваторія НАН України
publishDate 2016
url http://dspace.nbuv.gov.ua/handle/123456789/119947
citation_txt Evolution of density and velocity profiles of matter in large voids / M. Tsizh, B. Novosyadlyj // Advances in Astronomy and Space Physics. — 2016. — Т. 6., вип. 1. — С. 28-33. — Бібліогр.: 8 назв. — англ.
series Advances in Astronomy and Space Physics
work_keys_str_mv AT tsizhm evolutionofdensityandvelocityprofilesofmatterinlargevoids
AT novosyadlyjb evolutionofdensityandvelocityprofilesofmatterinlargevoids
first_indexed 2023-10-18T20:35:49Z
last_indexed 2023-10-18T20:35:49Z
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