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- I'm trying to get an intuitive understanding of how different expansion models show up on the Hubble plot and I can't wrap my head around the linearity of this one.
On Ned Wright's pages one can find this graph:
plotting some supernova data against different expansion models.
The main thing here that gives me a pause is the linear relationship for the closed universe with ##\Omega##=2 (red line). There doesn't seem to be any weird scaling involved. What is it, then, about this particular density that makes the plot of redshift vs this particular distance measure linear?
A reference to a non-obscure textbook or an online resource should suffice and will be appreciated, but patient explanations are more than welcome.
plotting some supernova data against different expansion models.
The main thing here that gives me a pause is the linear relationship for the closed universe with ##\Omega##=2 (red line). There doesn't seem to be any weird scaling involved. What is it, then, about this particular density that makes the plot of redshift vs this particular distance measure linear?
A reference to a non-obscure textbook or an online resource should suffice and will be appreciated, but patient explanations are more than welcome.