Late-time acceleration in higher dimensional cosmology

Journal Article · Thu Sep 01 00:00:00 EDT 2011 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2011/09/015· OSTI ID:22277828

Pahwa, Isha; Choudhury, Debajyoti

We investigate late time acceleration of the universe in higher dimensional cosmology. The content in the universe is assumed to exert pressure which is different in the normal and extra dimensions. Cosmologically viable solutions are found to exist for simple forms of the equation of state. The parameters of the model are fixed by comparing the predictions with supernovae data. While observations stipulate that the matter exerts almost vanishing pressure in the normal dimensions, we assume that, in the extra dimensions, the equation of state is of the form P∝ρ{sup 1−γ}. For appropriate choice of parameters, a late time acceleration in the universe occurs with q{sub 0} and z{sub tr} being approximately -0.46 and 0.76 respectively.

• OSTI ID: 22277828
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2011, Issue 09; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCELERATION
APPROXIMATIONS
COMPARATIVE EVALUATIONS
COSMOLOGICAL MODELS
COSMOLOGY
EQUATIONS OF STATE
MATHEMATICAL SOLUTIONS
SUPERNOVAE
UNIVERSE