Regular homogeneous T-models with vacuum dark fluid

We present the class of regular homogeneous T-models with vacuum dark fluid, associated with a variable cosmological term. The vacuum fluid is defined by the symmetry of its stress-energy tensor, i.e., its invariance under Lorentz boosts in a distinguished spatial direction (pj = -ρ), which makes this fluid essentially anisotropic and allows its density to evolve. Typical features of homogeneous regular T-models are: the existence of a Killing horizon; beginning of the cosmological evolution from a null bang at the horizon; the existence of a regular static pre-bang region visible to cosmological observers; creation of matter from anisotropic vacuum, accompanied by very rapid isotropization. We study in detail the spherically symmetric regular T-models on the basis of a general exact solution for a mixture of the vacuum fluid and dust-like matter and apply it to give numerical estimates for a particular model which illustrates the ability of cosmological T-models to satisfy the observational constraints. © 2007 IOP Publishing Ltd.

Авторы
Bronnikov K. 1, 2 , Dymnikova I.3, 4
Номер выпуска
23
Язык
Английский
Страницы
5803-5816
Статус
Опубликовано
Том
24
Год
2007
Организации
  • 1 VNIIMS, 3-1 M. Ulyanovoy St, Moscow 117313, Russian Federation
  • 2 Institute of Gravitation and Cosmology, PFUR, 6 Miklukho-Maklaya St, Moscow 117198, Russian Federation
  • 3 Department of Mathematics and Computer Science, University of Warmia and Mazury, Zolnierska 14, 10-561 Olsztyn, Poland
  • 4 A F Ioffe Physico-Technical Institute, Politekhnicheskaja 26, St Petersburg, 194021, Russian Federation
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/3173/