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To see what this means for the cosmological parameters, the best place to look is Figure 15 of the journal article [1]. The effect of the distance bias pushes
by brittonsmith 11y ago
To see what this means for the cosmological parameters, the best place to look is Figure 15 of the journal article [1]. The effect of the distance bias pushes for a higher value of Omega_M (the fraction of the energy density of the universe in matter) and a lower value of w (a term which characterizes the equation of state of dark energy). The currently accepted values for these two parameters are roughly Omega_M = 0.3 and w = -1. If w = -1, it means that dark energy is consistent with a cosmological constant, which is more-or-less the simplest form of dark energy (not that we really know what it is). Going to w < -1 is interesting because it means that the acceleration of the expansion of the universe will itself also increase, resulting in a Big Rip. If these findings are correct, it would mean the universe is more exotic than previously thought.
Also, here is a nice discussion of the equation of state of dark energy:
http://ned.ipac.caltech.edu/level5/March04/Carroll/Carroll4.html http://ned.ipac.caltech.edu/level5/March04/Carroll/Carroll4....
1 - http://arxiv.org/pdf/1408.1706v1.pdf http://arxiv.org/pdf/1408.1706v1.pdf