Gyroscopes orbiting gargantuan black holes - VIRTUAL


Drummond, L. (2023). Gyroscopes orbiting gargantuan black holes - VIRTUAL. Perimeter Institute for Theoretical Physics.


Drummond, Lisa. Gyroscopes orbiting gargantuan black holes - VIRTUAL. Perimeter Institute for Theoretical Physics, Nov. 30, 2023,


          @misc{ scivideos_PIRSA:23110083,
            doi = {10.48660/23110083},
            url = {},
            author = {Drummond, Lisa},
            keywords = {Strong Gravity},
            language = {en},
            title = {Gyroscopes orbiting gargantuan black holes - VIRTUAL},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2023},
            month = {nov},
            note = {PIRSA:23110083 see, \url{}}

Lisa Drummond Massachusetts Institute of Technology (MIT)

Source Repository PIRSA


Extreme mass-ratio binary black hole systems, known as EMRIs, are expected to radiate low-frequency gravitational waves detectable by planned space-based Laser Interferometer Space Antenna (LISA). We hope to use these systems to probe black hole spacetimes in exquisite detail and make precision measurements of supermassive black hole properties. Accurate models using general relativistic perturbation theory will allow us to unlock the potential of these unique systems. Such models must include post-geodesic corrections, which account for forces driving the smaller black hole away from a geodesic trajectory. When a spinning body orbits a black hole, its spin couples to the curvature of the background spacetime, introducing post-geodesic correction called the spin-curvature force. In this talk, I will present our calculation of EMRI waveforms that include both spin-curvature forces and the leading backreaction due to gravitational radiation. We use a near-identity transformation to eliminate dependence on the orbital phases, allowing for very fast computation of completely generic worldlines of spinning bodies; such efficiency is crucial for LISA data analysis. Finally, I will discuss what aspects still need to be included in future calculations so that we can use EMRIs for a new era of precision gravitational-wave astronomy, addressing outstanding puzzles in astrophysics, cosmology and fundamental theoretical physics.


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