npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041
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Review Paper

New Physics: Sae Mulli 2016; 66: 293-303

Published online March 31, 2016 https://doi.org/10.3938/NPSM.66.293

Copyright © New Physics: Sae Mulli.

Gravitational-wave Astronomy and Astrophysics

중력파 천문학 및 천체물리학 시대를 맞이하여

Chunglee KIM*1,6, Hee Suk CHO†2,6, Gungwon KANG2,6, Hyung Won LEE3,6, Chang-Hwan LEE4,6, Hyun Kyu LEE5,6

1 Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
2 Korea Institute of Science and Technology Information, Daejeon 34141, Korea
3 Department of Computer Simulation, Inje University, Gimhae 50834, Korea
4 Department of Physics, Pusan National University, Busan 46241, Korea
5 Department of Physics, Hanyang University, Seoul 04763, Korea
6 The Korean Gravitational Wave Group

Correspondence to:* chunglee.kim0@gmail.com, † chohs1439@gmail.com

Received: March 11, 2016; Revised: March 14, 2016; Accepted: March 14, 2016

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

On September 14, 2015, gravitational waves (GWs) were detected by the LIGO (Laser Interferometer gravitational-wave observatory) detectors in USA. The event (GW150914) is originated from a coalescence of two black holes (BHs) located at 13 billion light years away from the Earth. This is the first direct detection of GWs and the first observation of a BH-BH binary. We overview astrophysical sources that can be detected by km-scale laser interferometers on Earth, summarize astrophysical implications of GW150914, and discuss how to explore a Universe with GWs.

Keywords: Gravitational waves, Black holes, Neutron stars, Gamma-ray bursts, Supernovae, Astrophysics, Statistical analysis, Bayesian inference

2015년 9월 14일, 지구로부터 13억 광년 떨어진 곳에서 벌어진 블랙홀 쌍성의 병합으로 발생한 중력파가 라이고 레이저 간섭계 중력파 검출기에 포착되었다. 이는 최초의 중력파 검출이자 최초의 블랙홀 쌍성 발견이었다. 이 논문에서는 중력파 검출의 천체물리학적 의의를 짚어보고자 한다. 현재 지구상에 건설된 거대 레이저 간섭계의 성능으로 발견가능한 중력파원을 알아보고, 중력파형 모델링과 중력파 발견이 천체물리학 모델에 유용한 이유에 대해 간략히 기술한다. 또한 블랙홀-블랙홀 쌍성 및 중성자별-중성자별 쌍성 병합을 중심으로 중력파 모수 추정 (parameter estimation)에 관해 논한다. 마지막으로 중력파 천문학, 나아가서는 다중신호 천문학 (multi-messenger astronomy) 시대를 전망해본다.

Keywords: 중력파, 블랙홀, 중성자별, 감마선폭발, 초신성, 천체물리학, 통계 분석, 베이즈 추론

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