Speaker
David Lindsay
(None - Retired)
Description
The “Hubble tension” refers to a disagreement between the present expansion rate of the universe, and that projected by applying our current model (“Lambda Cold Dark Matter” or Lambda-CDM) to early universe measurements; Lambda-CDM yields an expansion rate substantially different from current measurement, by more than five standard deviations. We describe the model, in particular the meaning of Lambda, which has a parameter w = -1. We find that if instead w = -1.73, the projected expansion rate comes out right; however, any w < -1 will cause the end of the universe in a finite time. We present the mathematics and some conclusions.
Author
David Lindsay
(None - Retired)
