"Recent developments in the postMinkowskian approach to the spinning black hole binary problem"Justin Vines , Max Planck Institute for Gravitational Physics (Albert Einstein Institute) [Host: Alexander Grant]
ABSTRACT:
The detection and analysis of gravitational wave signals from coalescing binary systems crucially relies on analytic perturbative approaches to the twobody problem in general relativity (as well as on numerical approaches). While the postNewtonian (weakfield and slowmotion) approximation is most directly relevant to observations by LIGO et al., recent developments have revived interest in the more inclusive postMinkowskian (weakfield but arbitraryspeed) approximation  particularly in relation to highly advanced techniques developed by particle physicists for computing relativistic quantum scattering amplitudes and associated classical observables. This interplay between highenergy quantum physics and gravitationalwave science has led to several new results and useful insights, particularly regarding relationships between complimentary approximation schemes; this importantly also includes the "selfforce" or "posttestbody" approach, treating small mass ratios but arbitrary field strengths and speeds. We will review some of these developments, focusing on the postMinkowskian treatment of the spinning black hole binary problem. VIDEO:

Gravity Seminar Monday, March 8, 2021 1:00 PM Online, Room Zoom Note special time. Note special room. Join Zoom Meeting:https://virginia.zoom.us/j/98166651049Meeting ID: 981 6665 1049

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