|2018 Fall Physics Colloquium Series|
Mustapha Ishak-Boushaki, Ph.D.
University of Texas at Dallas
The Acceleration of the Cosmos and
Tests of Gravity at Large-Scales in the Universe
For over two decades, cosmological observations indicate that the expansion of the universe is accelerating. Cosmic acceleration and the questions associated with it are at the heart of one of the most challenging and puzzling problems in cosmology and physics. What is the cause of this acceleration? Is it because of a repulsive dark energy or cosmological constant pervading the universe, or perhaps a modification to Einstein’s General Relativity that takes effect at cosmological scales of distance, or because the expansion rate of space-time is uneven from one region to another in the universe? This question also motivated testing gravity physics (General Relativity) at cosmological scales using multiple techniques and approaches. I will review these possibilities and discuss what recent results, including ours, have to say about it.
For more information contact: Dr. Anzhong Wang 254-710-2276