Calculating the density parameter (Cosmology)

AI Thread Summary
The discussion focuses on calculating the density parameter in cosmology using the provided data: z=0.04, m=17.38, and σ=0.19. The density parameter is defined as the ratio of the current density (p0) to the critical density (pc). The participant expresses uncertainty about how to proceed due to insufficient information to determine the current density of the universe. They seek assistance in solving the problem. The conversation also includes a brief expression of frustration about the lack of responses.
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Homework Statement



Decide the density parameter from the following data:

z=0.04, m= 17.38 and σ=0.19

Homework Equations



Definition of the density parameter:

2ry0bgw.png


Where p0 is the current density and pc is the critical density.

The Attempt at a Solution



I feel like I don't have enough information to calculate it as I'm unable to calculate the current density of the universe. Any help is greatly appreciated! Thanks.
 
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Two pictures of an attempt at a solution (no units)>

ab2yyt.png


and

qpos3d.png
 
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