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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| Опубліковано в: : | Advances in Astronomy and Space Physics |
|---|---|
| Дата: | 2015 |
| Автори: | , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Головна астрономічна обсерваторія НАН України
2015
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| Онлайн доступ: | https://nasplib.isofts.kiev.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. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862543762329174016 |
|---|---|
| author | Tsizh, M. Novosyadlyj, B. |
| author_facet | Tsizh, M. Novosyadlyj, B. |
| 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. |
| collection | DSpace DC |
| container_title | Advances in Astronomy and Space Physics |
| 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.
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| first_indexed | 2025-11-24T23:41:18Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-119826 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 2227-1481 |
| language | English |
| last_indexed | 2025-11-24T23:41:18Z |
| publishDate | 2015 |
| publisher | Головна астрономічна обсерваторія НАН України |
| record_format | dspace |
| spelling | Tsizh, M. Novosyadlyj, B. 2017-06-09T21:12:09Z 2017-06-09T21:12:09Z 2015 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 https://nasplib.isofts.kiev.ua/handle/123456789/119826 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. This work was supported by the projects of Ministry of Education and Science of Ukraine (state registration numbers 0115U003279 and 0113U003059). en Головна астрономічна обсерваторія НАН України Advances in Astronomy and Space Physics Dynamics of dark energy in collapsing halo of dark matter Article published earlier |
| spellingShingle | Dynamics of dark energy in collapsing halo of dark matter Tsizh, M. Novosyadlyj, B. |
| title | 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_short | Dynamics of dark energy in collapsing halo of dark matter |
| title_sort | dynamics of dark energy in collapsing halo of dark matter |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/119826 |
| work_keys_str_mv | AT tsizhm dynamicsofdarkenergyincollapsinghaloofdarkmatter AT novosyadlyjb dynamicsofdarkenergyincollapsinghaloofdarkmatter |