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Probing gravitation, dark energy, and acceleration [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. High Energy Physics Division, 2004.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
vp : digital, PDF file
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy. High Energy Physics Division, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The acceleration of the expansion of the universe arises from unknown physical processes involving either new fields in high energy physics or modifications of gravitation theory. It is crucial for our understanding to characterize the properties of the dark energy or gravity through cosmological observations and compare and distinguish between them. In fact, close consistencies exist between a dark energy equation of state function w(z) and changes to the framework of the Friedmann cosmological equations as well as direct spacetime geometry quantities involving the acceleration, such as ''geometric dark energy'' from the Ricci scalar. We investigate these interrelationships, including for the case of super acceleration or phantom energy where the fate of the universe may be more gentle than the Big Rip.
Report Numbers
E 1.99:lbnl--56025
lbnl--56025
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Note
Published through SciTech Connect.
02/20/2004.
"lbnl--56025"
Astrophysics, Abstract 0402503 FT
Linder, Eric V.
Funding Information
AC03-76SF00098
PB1150
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