Nature News | Davide Castelvecchi | 2016 Apr 11
Discrepancy between observations could point to new physics.
The most precise measurement ever made of the current rate of expansion of the Universe has produced a value that appears incompatible with measurements of radiation left over from the Big Bang. If the findings are confirmed by independent techniques, the laws of cosmology might have to be rewritten.
This might even mean that dark energy — the unknown force that is thought to be responsible for the observed acceleration of the expansion of the Universe — has increased in strength since the dawn of time.
“I think that there is something in the standard cosmological model that we don't understand,” says astrophysicist Adam Riess, a physicist at Johns Hopkins University in Baltimore, Maryland, who co-discovered dark energy in 1998 and led the latest study.
Kevork Abazajian, a cosmologist at the University of California, Irvine, who was not involved in the study, says that the results have the potential of “becoming transformational in cosmology”. ...
A 2.4% Determination of the Local Value of the Hubble Constant - Adam G. Riess et al
- arXiv.org > astro-ph > arXiv:1604.01424 > 05 Apr 2016