Posted by qwerty on Wednesday, January 16, 2013 at 12:17am.
The most cosmological measurements show that the universe is extremely flat (Ωk≈0) and that the surface brightness of objects scales with the fourth power of redshift (SB∝z^−4). If the universe was still expanding, but had strong negative curvature (Ωk>1), how would SB scale with z? Define α such that SB∝z^α.
* Surface brightness doesn’t scale with redshift if Ωk>1
* α less than −4
* α=−4 (no change)
* α more than −4

Cosmology  Roland, Tuesday, January 27, 2015 at 9:12am
á less than −4
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