Flat Friedmann universe filled by dust and scalar field with multiple exponential potential

We study a spatially flat Friedmann model containing a pressureless perfect fluid ( dust) and a scalar field with an unbounded from below potential of the form V(phi) = W-0 - V-0 sinh(root3/2kappaphi), where the parameters W-0 and V-0 are arbitrary and kappa = root8piG(N) = M-p(-1). The model is integrable and all exact solutions describe the recollapsing universe. The behavior of the model near both initial and final points of evolution is analyzed. The model is consistent with the observational parameters. We single out the exact solution with the present-day values of acceleration parameter q(0) = 0.5 and dark matter density parameter Omega(rho0) = 0.3 describing the evolution within the time approximately equal to 2H(0)(-1).

Авторы
Gavrilov V.R. , Melnikov V.N. , Abdyrakhmanov S.T.
Редакторы
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Сборник материалов конференции
Издательство
-
Номер выпуска
7
Язык
Английский
Страницы
1579-1592
Статус
Опубликовано
Подразделение
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Ссылка
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Номер
-
Том
36
Год
2004
Организации
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Ключевые слова
dust; scalar field; multiple exponential potential; exact solutions; recollapse
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/8885/