|Dr Gurudatt Gaur||Group Leader|
|Chetan Verma||Junior Research Fellow|
Gravitational Waves are ripples in the curvature in space-time, predicted by Einstein in his theory of General Relativity. The gravitational wave signals are very weak and their interaction with matter is also very weak. This makes their detection very challenging. Recently, two LIGO detectors (working on the principle of Michelson interferometer) have been able to record two gravitational wave signals (GW150914 and GW151226). As due to small SNR the gravitational waves can not be observed directly, data analysis play a crucial role in detecting GW signals and in extracting the physics from the detection(s). Techniques of statistical signal processing are used in analyzing the GW data. We currently work on coincident detection and parameter estimation of gravitational waves emitted from binaries of compact objects (neutron stars / black holes).
Plasma is also known as the fourth state of matter. A plasma is essentially a collection of charged and neutral particles satisfying certain criteria (plasma criteria). Most of the plasma in the universe can be modeled using the fluid description (e.g. MHD). Consequently, well know fluid instabilities (such as, Kelvin-Helmholtz, Rayleigh-Taylor) are ubiquitously studied in plasma. Since the species (electrons, ions) are charged, there are intrinsic length and time scales also present there, which makes the plasma instabilities very rich and interesting. The instabilities lead to the evolution of the equilibrium configurations, sometimes to the point of complete destruction. We try to understand the behavior of shear driven instabilities and the ways to suppress them.
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