Seljak potvrdio generalnu teoriju relativnosti i postojanje tamne materije
Seljak je rekao da imamo neke grube i neprecizne testove generalne relativnosti na galaktickom nivou, ali nemamo dobra predvidjanja tih testova od alternativnih teorija koje se nadmecu.
“The nice thing about going to the cosmological scale is that we can test any full, alternative theory of gravity, because it should predict the things we observe,” said co-author Uros Seljak, a professor of physics and of astronomy at UC Berkeley and a faculty scientist at Lawrence Berkeley National Laboratory who is currently on leave at the Institute of Theoretical Physics at the University of Zurich. “Those alternative theories that do not require dark matter fail these tests.”
Tests to distinguish between competing theories are not easy, Seljak said. A theoretical cosmologist, he noted that cosmological experiments, such as detections of the cosmic microwave background, typically involve measurements of fluctuations in space, while gravity theories predict relationships between density and velocity, or between density and gravitational potential.
Seljak noted that these tests do not tell astronomers the actual identity of dark matter or dark energy. That can only be determined by other types of observations, such as direct detection experiments.
http://newscenter.berkeley.edu/2010/03/10/general_relativity/
 |  |
 |
