Data analysis of gravitational waves from compact binary coalescences by using advanced gravitational wave detectors' data

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05081
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo (2017); Osaka City University (2015-2016)
• Principal Investigator: Tagoshi Hideyuki 東京大学, 宇宙線研究所, 准教授 (30311765)
• Research Collaborator: NARIKAWA Tatsuya ; UCHIKATA Nami ; KANEYAMA Masato ; YUZURIHARA Hirotaka
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 重力波 / レーザー干渉計 / コンパクト連星 / ブラックホール / 中性子星 / データ解析

Outline of Final Research Achievements

We performed the search for gravitational wave from binary neutron star coalescences and set an upper limit to the event rate. We derived gravitational wave echos produced by binary black hole coalescences. We showed that it is not optimal for small aperture optical telecopes to perform follow-up observation to the direction determined by two LIGO detectors. We investiagated the possibility to restrict the deviation of gravitational waveforms from general relativity, and found that we may be able to detect deviation even with one gravitational wave event. We analyzed gravitational waveforms produced by hypermassive neutron stars produced after binary neutron star coalescences by using Hilbert-Huang transform. We found that if the event occurs within 10Mpc, it is possible to determine the frequency evolution in 5% accuracy.

Free Research Field

重力波宇宙物理学