An Accelerating Cosmology Without Dark Energy

Understand

The negative pressure accompanying gravitationally-induced particle creation can lead to a cold dark matter (CDM) dominated, accelerating Universe (Lima et al.

• 1996) without requiring the presence of dark energy or a cosmological constant.
• In a recent study Lima et al.
• (2008, LSS) demonstrated that particle creation driven cosmological models are capable of accounting for the SNIa observations of the recent transition from a decelerating to an accelerating Universe.