세종대학교 두드림 비교과통합관리시스템

물리천문학과 콜로퀴움

‧강연 제목 : GW170817: Rejuvenation in gravitational-wave emission following gravitational collapse to a black hole

‧연사 : 세종대학교 물리천문학과 Maurice Van Putten 교수님

‧일시 : 2021년 10월 6일 (수요일) 17:00~18:15

‧진행 방법 : 온라인 웹엑스로 진행

‧신청 가능 대상 : 세종대학교 재학생 누구나

‧신청기간 : 10/5 월 18:00 ~ 10/6 수 12:00

‧상세 내용은 물리천문학과 홈페이지를 참고하세요. 

  http://home.sejong.ac.kr/~phyastrodpt/9.html  

‧강의 초록

GW170817 is an exceptionally nearby gravitational-wave observation of the merger of two neutron stars, easily seen in spectrograms of the LIGO H1 and L1 detectors. What happens when two neutorn stars merge? Following an introduction to gravitational-waves and ongoing activities in this new area of gravitational-wave astronomy, we will review the complex merger process of this enigmatic event. Highlighted is the dramatic enhancement of the energy reservoir in angular momentum in gravitational collapse to a rotating black hole, setting the initial condition for prodigious multi-messenger output post-merger. This prospect appears to pan out by in-depth analysis of H1 and L1 data making full use of modern heterogenous computing. The results show the collapse to occur at about 0.9 s after the final merger of the double neutron star progenitor, subsequently releasing 3.5% MSolar c2 in Extended Emssion in gravitational-waves over the course of black hole spin-down in about 3 seconds - the duration of the associated GRB170817A