How much of the universe is dark energy

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The Proportion of Dark Energy in the Universe

Understanding Dark Energy: A Major Component of the Universe

Dark energy is a mysterious and dominant component of the universe, accounting for a significant portion of its total energy density. Recent cosmological observations and theoretical models consistently suggest that dark energy constitutes approximately 70% of the universe's total energy content Padmanabhan2004Beesham2022Chernin2010+2 MORE. This component is responsible for the accelerated expansion of the universe, a phenomenon first discovered in 1998 Beesham2022Frieman2008.

Quantifying Dark Energy: Observational Evidence

Several studies have provided precise estimates of the proportion of dark energy. For instance, one study indicates that dark energy makes up about 68.3% of the universe . Another research paper supports this finding, suggesting that dark energy contributes around 70% to 75% of the total mass/energy content of the observed universe . These estimates are corroborated by various observational methods, including measurements of cosmic microwave background (CMB) anisotropy, type Ia supernovae, and baryon acoustic oscillations Huterer2000Tsujikawa2010.

Theoretical Models and Challenges

The exact nature of dark energy remains one of the most profound mysteries in cosmology. Theoretical models propose several candidates for dark energy, including the cosmological constant (vacuum energy), quintessence, and other exotic forms such as Chaplygin gas and bulk viscosity Turner1998Beesham2022Tsujikawa2010. Despite extensive research, there is still no definitive explanation for dark energy, and its properties continue to be a subject of intense investigation Padmanabhan2004Huterer2000.

Conclusion

In summary, dark energy is a crucial component of the universe, making up about 70% of its total energy density. This enigmatic force drives the accelerated expansion of the universe, posing significant challenges and opportunities for future research in cosmology. Understanding dark energy is essential for a comprehensive picture of the universe's composition and evolution.

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Most relevant research papers on this topic

Dark Matter and Dark Energy in the Universe

This paper presents a complete accounting of matter and energy in the universe, revealing three "dark problems" and offering leading candidates for dark matter, nonbaryonic dark matter, and dark energy.

Highly Cited

1998·

156citations

·M. Turner

Physica Scripta·

DOI

The dark universe

The dark universe, composed of 26.8% dark matter and 68.3% dark energy, remains a mystery, and the next generation of physicists must explore new methods to understand its mysteries.

Rigorous Journal

2016·

2citations

·Richard Hodson

Nature·

DOI

Dark energy: The cosmological challenge of the millennium

The cosmological constant is a potential choice for modeling dark energy, which is driving an accelerated expansion of the universe, but conceptual issues and uncertainties remain.

Highly Cited

2004·

174citations

·T. Padmanabhan

Current Science

Dark energy, Chaplygin gas and viscosity

Mathematically, Chaplygin gas and bulk viscosity are equivalent, but their physical interpretations differ.

2022·

0citations

·A. Beesham et al.

International Journal of Modern Physics D·

DOI

Dark energy in the local Universe

HST observations support the understanding of dark energy as a constant density vacuum throughout space, contributing 70-75% to the total mass/energy content of the observed Universe.

2010·

1citation

·A. Chernin et al.

DOI

PROBING DARK ENERGY: METHODS AND STRATEGIES

Supernovae and number counts have the most potential to probe dark energy, with CMB anisotropy providing the first measurements and supernovae and number counts providing the most potential for constraining cosmological parameters.

Highly Cited

2000·

376citations

·D. Huterer et al.

Physical Review D·

DOI

Dark energy: investigation and modeling

Dark energy accounts for 70% of the universe's energy density, accelerating its expansion, and various theoretical approaches have been proposed to explain its origin.

Highly Cited

2010·

170citations

·S. Tsujikawa

arXiv: Cosmology and Nongalactic Astrophysics·

DOI

From Witten’s 462 Supercharges of 5-D Branes in Eleven Dimensions to the 95.5 Percent Cosmic Dark Energy Density behind the Accelerated Expansion of the Universe

The 95.5% cosmic dark energy density is determined by the ratio of the 462 states of five-dimensional branes to the total number of states, namely 528 minus the 44 degrees of freedom of the vacuum, and is nearly identical to the observed accelerated cosmic expansion.

2016·

13citations

·M. Naschie

Journal of Quantum Information Science·

DOI

Dark Energy and the Accelerating Universe

The universe's expansion is accelerating, potentially signaling a break in general relativity or revealing the existence of dark energy.

Highly Cited

2008·

1689citations

·J. Frieman et al.

Annual Review of Astronomy and Astrophysics·

DOI

The Accurate Theoretical Calculation of the Percentages of Dark Energy, Dark Matter, and Baryonic Matter

The theoretical calculation of dark energy, dark matter, and baryonic matter is accurate, with the maximum percentage of variable dark energy being 75% and the ratio of dark matter to baryonic matter being 5 to 1.

Preprint

2012·

2citations

·Ding-Yu Chung

viXra

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