Current Observational Constraints on Cosmic Doomsday

Technical Report · Tue Sep 14 00:00:00 EDT 2004

DOI:https://doi.org/10.2172/833037· OSTI ID:833037

Wang, Yun ^[1]

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1. SLAC

In a broad class of dark energy models, the universe may collapse within a finite time t{sub c}. Here we study a representative model of dark energy with a linear potential, V({phi})=V{sub 0}(1 + {alpha}{phi}). This model is the simplest doomsday model, in which the universe collapses rather quickly after it stops expanding. Observational data from type Ia supernovae (SNe Ia), cosmic microwave background anisotropy (CMB), and large scale structure (LSS) are complementary in constraining dark energy models. Using the new SN Ia data (Riess sample), the CMB data from WMAP, and the LSS data from 2dF, we find that the collapse time of the universe is t{sub c} {approx}> 42 (24) gigayears from today at 68% (95%) confidence.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 833037
• Report Number(s): SLAC-PUB-10697
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
ENERGY MODELS
SUPERNOVAE
UNIVERSE