Exact Solutions and Accelerating Universe in Modified Brans-Dicke Theories

Understand

Exact solutions are studied in the context of modified Brans-Dicke theory.

• The non-linearity of the modified Brans-Dicke field equations is treated with the Euler-Duarte-Moreira method of integrability of anharmonic oscillator equation.
• While some solutions show a forever accelerating nature, in some cases there is a signature flip in the evolution of deceleration parameter in recent past.
• Importance of these latter models are studied in the context of late-time acceleration of the universe.