Accelerating Universe Expansion: Age & Hubble Constant

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    Accelerating Expansion
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Discussion Overview

The discussion centers on the relationship between the accelerating expansion of the Universe, the age of the Universe, and the Hubble Constant. It explores theoretical implications and assumptions within cosmological models, particularly in relation to the Lambda-CDM model.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant discusses how the age of the Universe is influenced by the rate of acceleration and the Hubble Constant, suggesting that future expansion scenarios depend on these factors.
  • Another participant asserts that the age of the Universe is fixed and does not change with varying rates of acceleration, although they acknowledge that the rate itself may evolve over time.
  • A third participant critiques the assumptions made in the original article, arguing that they conflict with the Lambda-CDM model and that a simple power law is inadequate due to the presence of multiple energy components in the Universe.
  • This participant also notes that the estimate for the age of the Universe relies on the underlying cosmological model.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between the age of the Universe and the rate of acceleration, with no consensus reached on the validity of the assumptions made in the original article.

Contextual Notes

The discussion highlights limitations related to the assumptions underlying cosmological models, particularly regarding the treatment of energy components and their influence 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.
 
Last edited by a moderator:
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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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