Dynamics of dark energy in collapsing halo of dark matter

We investigate the non-linear evolution of spherical density and velocity perturbations of dark matter and dark energy in the expanding Universe. For this we have used the conservation and Einstein equations to describe the evolution of gravitationally coupled inhomogeneities of dark matter, dark en...

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Бібліографічні деталі
Дата:2015
Автори: Tsizh, M., Novosyadlyj, B.
Формат: Стаття
Мова:English
Опубліковано: Головна астрономічна обсерваторія НАН України 2015
Назва видання:Advances in Astronomy and Space Physics
Онлайн доступ:http://dspace.nbuv.gov.ua/handle/123456789/119826
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:Dynamics of dark energy in collapsing halo of dark matter / M. Tsizh, B. Novosyadlyj // Advances in Astronomy and Space Physics. — 2015. — Т. 5., вип. 1. — С. 51-56. — Бібліогр.: 15 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
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spelling irk-123456789-1198262017-06-10T03:03:20Z Dynamics of dark energy in collapsing halo of dark matter Tsizh, M. Novosyadlyj, B. We investigate the non-linear evolution of spherical density and velocity perturbations of dark matter and dark energy in the expanding Universe. For this we have used the conservation and Einstein equations to describe the evolution of gravitationally coupled inhomogeneities of dark matter, dark energy and radiation from the linear stage in the early Universe to the non-linear stage at the current epoch. A simple method of numerical integration of the system of non-linear differential equations for evolution of the central part of halo is proposed. The results are presented for the halo of cluster (k = 2 Mpc⁻¹ ) and supercluster scales (k = 0.2 Mpc⁻¹ ) and show that a quintessential scalar field dark energy with a low value of effective speed of sound cٍ < 0.1 can have a notable impact on the formation of large-scale structures in the expanding Universe. 2015 Article Dynamics of dark energy in collapsing halo of dark matter / M. Tsizh, B. Novosyadlyj // Advances in Astronomy and Space Physics. — 2015. — Т. 5., вип. 1. — С. 51-56. — Бібліогр.: 15 назв. — англ. 2227-1481 DOI: 10.17721/2227-1481.5.51-56 http://dspace.nbuv.gov.ua/handle/123456789/119826 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 investigate the non-linear evolution of spherical density and velocity perturbations of dark matter and dark energy in the expanding Universe. For this we have used the conservation and Einstein equations to describe the evolution of gravitationally coupled inhomogeneities of dark matter, dark energy and radiation from the linear stage in the early Universe to the non-linear stage at the current epoch. A simple method of numerical integration of the system of non-linear differential equations for evolution of the central part of halo is proposed. The results are presented for the halo of cluster (k = 2 Mpc⁻¹ ) and supercluster scales (k = 0.2 Mpc⁻¹ ) and show that a quintessential scalar field dark energy with a low value of effective speed of sound cٍ < 0.1 can have a notable impact on the formation of large-scale structures in the expanding Universe.
format Article
author Tsizh, M.
Novosyadlyj, B.
spellingShingle Tsizh, M.
Novosyadlyj, B.
Dynamics of dark energy in collapsing halo of dark matter
Advances in Astronomy and Space Physics
author_facet Tsizh, M.
Novosyadlyj, B.
author_sort Tsizh, M.
title Dynamics of dark energy in collapsing halo of dark matter
title_short Dynamics of dark energy in collapsing halo of dark matter
title_full Dynamics of dark energy in collapsing halo of dark matter
title_fullStr Dynamics of dark energy in collapsing halo of dark matter
title_full_unstemmed Dynamics of dark energy in collapsing halo of dark matter
title_sort dynamics of dark energy in collapsing halo of dark matter
publisher Головна астрономічна обсерваторія НАН України
publishDate 2015
url http://dspace.nbuv.gov.ua/handle/123456789/119826
citation_txt Dynamics of dark energy in collapsing halo of dark matter / M. Tsizh, B. Novosyadlyj // Advances in Astronomy and Space Physics. — 2015. — Т. 5., вип. 1. — С. 51-56. — Бібліогр.: 15 назв. — англ.
series Advances in Astronomy and Space Physics
work_keys_str_mv AT tsizhm dynamicsofdarkenergyincollapsinghaloofdarkmatter
AT novosyadlyjb dynamicsofdarkenergyincollapsinghaloofdarkmatter
first_indexed 2023-10-18T20:35:31Z
last_indexed 2023-10-18T20:35:31Z
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