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Title: What We Know About Dark Energy From Supernovae

Abstract

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 energy (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.

Authors:
Publication Date:
Research Org.:
FNAL (Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States))
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
987520
DOE Contract Number:
AC02-07CH11359
Resource Type:
Multimedia
Resource Relation:
Conference: Fermilab Colloquia, Fermi National Accelerator Laboratory (FNAL), Batvia, Illinois (United States), presented on May 21, 2008
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; SUPERNOVAE; COSMOLOGY; DARK ENERGY

Citation Formats

Filippenko, Alex. What We Know About Dark Energy From Supernovae. United States: N. p., 2008. Web.
Filippenko, Alex. What We Know About Dark Energy From Supernovae. United States.
Filippenko, Alex. Wed . "What We Know About Dark Energy From Supernovae". United States. https://www.osti.gov/servlets/purl/987520.
@article{osti_987520,
title = {What We Know About Dark Energy From Supernovae},
author = {Filippenko, Alex},
abstractNote = {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 energy (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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {5}
}

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