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Vaibhav Tiwari

Mr Vaibhav Tiwari

Research Associate
Gravity Exploration Institute

School of Physics and Astronomy


I focus on the inference and interpretation of the compact binary population using gravitational wave signals. The inferred population is expected to characterise the scenarios responsible for the formation of compact binaries and is now providing uncharted information. We now know that compact objects merge frequently in the universe. We have started to understand how their masses and spins are distributed. Going forward we would like to understand the environments where compact binaries are formed and merge. 

I have been fortunate to contribute to this emerging field. I made central contributions to the search analysis that made the first gravitational wave detection. Recently I wrote a code to flexibly infer the compact binary population. This code discovered multiple features in the binary black hole population, including an emerging structure in the mass distribution showing the presence of peaks and suggesting the over-production of binary black-holes around certain mass values.














Research interests

I focus on search of gravitational waves in the data obtained from ground based detectors, in particular gravitational waves produced from the merger of compact binary coalescence. I am a member of the LIGO-Virgo collaboration that detected the first gravitational wave signal. My interest lies in gravitational wave astronomy of numbers, i.e. provided multiple signals observed by the detector what can one say about the past state of the universe. This can include understanding the mass and spin distribution of the black holes, understanding the dynamics (or a combination of them) that produced the observed distributions, or any cosmological or astrophysical information that can be interpreted.


After completing my undergraduate in Aerospace engineering from IIT Kharagpur, I went on to complete master in Physics at the University of South Carolina followed by PhD at the University of Florida. At Florida I was involved in first ever eccentric binary search using excess energy methods, under the guidance of Dr. Sergei Klimenko. As a post-doctoral associate at Cardiff University, I plan to continue the search of gravitational waves from coalescing binaries, under Dr. Stephen Fairhurst.