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Title: What We Know About Dark Energy from Supernovae

The measured distances of type Ia (white dwarf) supernovae as a function of redshift (z) have shown that the expansion of the Universe is currently accelerating, probably due to the presence of dark emore »nergy (X) having a negative pressure. Combining all of the data with existing results from large-scale structure surveys, we find a best fit for Omega M and Omega X of 0.28 and 0.72 (respectively), in excellent agreement with the values derived independently from WMAP measurements of the cosmic microwave background radiation. Thus far, the best-fit value for the dark energy equation-of-state parameter is -1, and its first derivative is consistent with zero, suggesting that the dark energy may indeed be Einstein's cosmological constant.« less
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Title: What We Know About Dark Energy from Supernovae
Authors:
Publication Date: 2008-05-21
OSTI Identifier: 1016785
DOE Contract Number: AC02-07CH11359
Other Number(s): TRN: US201204%%487
Resource Type: Multimedia
Resource Relation: Conference: Fermilab Colloquia, Fermi National Accelerator Laboratory (FNAL), Batvia, Illinois (United States), presented on May 21, 2008
Research Org: FNAL (Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States))
Sponsoring Org: USDOE Office of Science (SC)
Subject: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; COSMOLOGICAL CONSTANT ; RELICT RADIATION ; SUPERNOVAE ; UNIVERSE
Country of Publication: United States
Language: English
Run Time: 1:14:27
System Entry Date: 2016-01-27