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작성자 CQUeST 날짜 2019-05-13
제목 [Seminar] May.30, (Thur) 4:30 pm, Dong-Hoon Kim
Seminar
DATE & TIME   May 30 (Thur), 4:30 pm
PLACE   R1029
SPEAKER   Dong-Hoon Kim
HOST   Hyun Seok Yang
INSTITUTE   Sungkyunkwan University
TITLE   Mechanisms for Gravitational-Wave Generation and Radiation Reaction
ABSTRACT

  In this talk I will briefly review how to compute gravitational waves (GWs) produced from some (1) astrophysical and (2) cosmological sources. As for the former (1), GWs from binaries of compact objects, such as black holes and neutron stars, can be computed typically by the following methods: (i) Post-Newtonian approximations for comparable mass binaries, (ii) point-particle and semi-relativistic approximations for extreme-mass-ratio binaries. As for the latter (2), colliding bubbles in the early Universe can be possible sources for GWs, which can be computed by means of the dynamics of a scalar field coupled to gravity, based on a collision mechanism modeled by the Coleman-de Luccia instanton. In addition, I will also discuss effects of radiation reaction on GWs from extreme-mass-ratio binaries, on the basis of non-trivial gravitational self-force analyses.


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