IISER Pune
INDIAN INSTITUTE OF SCIENCE EDUCATION AND RESEARCH (IISER) PUNE
where tomorrow’s science begins today
An Autonomous Institution, Ministry of Human Resource Development, Govt. of India
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Seminars and Colloquia

Physics

Numerical simulations of binary black holes & Advanced LIGO Science 
 
Fri, Sep 06, 2019,   04:00 PM at Seminar Hall 31, 2nd Floor, Main Building

Prof. Prayush Kumar
Cornell University, NY

Abstract: The discovery of gravitational waves by Advanced LIGO observatories has opened a new window to look through into our Universe. The primary sources for these waves have so far been massive inspiraling binaries of stellar-collapse black holes. Our ground-based detectors are able to observe the last few tens of orbits of these heavy binaries before they merge. These pre-merger orbits are highly relativistic and understanding the non-linearities of this regime requires solving Einstein equations numerically, especially since analytic approximations break down. In this talk I will summarize the methods we use to evolve binary black hole spacetimes in fully nonlinear General Relativity using supercomputers. I will focus on spectral methods that are used for these evolutions by the Spectral Einstein Code (SpEC). I will also summarize the various ways in which these numerical simulations have made possible precision gravitational-wave astrophysics and tests of Einstein's theory of gravity.

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