Accelerating Universe Expansion: Age & Hubble Constant

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    Accelerating Expansion
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SUMMARY

The discussion centers on the relationship between the age of the Universe and the Hubble Constant, emphasizing that the age remains constant despite changes in the rate of expansion. It critiques assumptions made in a referenced article regarding the Lambda-CDM model, highlighting that a simple power law is inadequate when multiple energy components, such as matter and the cosmological constant, have similar energy densities. The conversation concludes with the assertion that the estimate for the Universe's age is fundamentally tied to the cosmological model.

PREREQUISITES
  • Understanding of the Lambda-CDM model
  • Familiarity with the Hubble Constant
  • Knowledge of cosmological energy components
  • Basic principles of cosmic expansion
NEXT STEPS
  • Research the Lambda-CDM model in detail
  • Study the implications of the Hubble Constant on cosmic expansion
  • Explore the role of energy density in cosmology
  • Learn about the equation of state parameter in cosmological contexts
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Astronomers, cosmologists, and physics students interested in the dynamics of cosmic expansion and the implications of the Hubble Constant on the age of the Universe.

Mike holden
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TL;DR
How the age of the Universe depends on the rate of acceleration.
In my article - The accelerating expansion of the Universe at:
[Unacceptable reference delted by the Mentors]
I discuss how the age of the Universe depends on the rate of acceleration, the common factor being the value of the Hubble Constant at the present time. I go on to show how the expansion progresses in the future for each scenario.
 
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Mike holden said:
age of the Universe depends on the rate of acceleration
The age of the universe is what it is. It doesn't get older because the rate changes, although the rate may change as it gets older.
 
The article makes fundamental assumptions that are not in accordance with the Lambda-CDM model. Assuming a simple power law is fine if you only have a single type of energy component in the Universe, but then the exponent will depend on the equation of state parameter of that component. In the current Universe, matter and the cosmological constant are of similar energy density and this means the simple power law is not a good description.

In addition, the estimate for the age of the Universe is based upon the cosmological model.
 
Since the thread start was based on an unacceptable reference, the thread is closed.
 

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