Found 3 result(s)
Regular Seminar Sangmin Lee (Seoul National University)
at: 14:00 room GO Jones 516  abstract: Building upon recent progress in applying amplitude techniques to perturbative general relativity, we propose a closedform formula for the conservative Hamiltonian of a spinning binary system at the 1st postMinkowskian order. It is applicable for general spinning bodies with arbitrary spin multipole moments. It is linear in gravitational constant by definition, but exact to all orders in momentum and spin expansions. At each spin order, our formula implies that the spindependence and momentum dependence factorize completely. We compare our formula to a similar one derived in 2017 from a spinning testbody near a Kerr black hole and find perfect agreement. 
Regular Seminar Sangmin Lee (Seoul National University)
at: 14:00 room Huxley 503  abstract: We study the near horizon geometry of extremal black holes in five dimensional gauged supergravity using Sen's entropy function formalism. Special attention is paid to the large black hole limit where the near horizon solution exhibits a universal dependence on the rotation. The physical properties of the large black hole solution are shown to agree with predictions from fluid mechanical description of the dual conformal field theory. 
Regular Seminar Sangmin Lee (IC)
at: 16:30 room H503  abstract:
