Astronomy and Astrophysics Seminars

Exploring the Gravitational Universe with LIGO and Torsion-Balance Experiments

by Dr. Krishna Venkateswara (Department of Physics University of Washington Seattle, USA)

Monday, September 25, 2017 from to (Asia/Kolkata)
at Lecture Theatre ( AG 66 )
Gravity is central to many of the puzzles in modern physics such as Dark Energy, Dark Matter, and 
the Early Universe. Gravitational-wave astronomy with compact binary mergers, supernovae, and other sources with LIGO,
and precision experiments with Torsion-Balances can provide answers to these mysteries and pave the way to a better
understanding of our universe.
In the first part of my talk, I will describe the LIGO detectors and the unique gravitational-wave science
they are enabling. I will focus on an important subsystem, the active seismic isolation system, which 
I helped to improve using ultra-sensitive ground-rotation sensors, developed at the University of Washington (UW). 
In the later part of my talk, I will describe some of the Torsion-Balance experiments being done at UW, focusing on
two which can improve the search for short range violations of the inverse square law or spin-coupled forces, 
and recently proposed ultra-light bosonic dark matter.