Formulation of the inverse problem in gravitational waves astronomy and its application to a test of modified gravity theories

2020 Fiscal Year Final Research Report

• Project/Area Number: 17K05431
• 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: Hirosaki University
• Principal Investigator: Asada Hideki 弘前大学, 理工学研究科, 教授 (50301023)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Keywords: 重力理論 / 理論宇宙物理学

Outline of Final Research Achievements

The research field of gravitational waves has attracted a broad public interest as shown by the Nobel prize of physics in 2017. The observational results have been so far consistent with the prediction of Einstein's theory of general relativity within the observational accuracy. On the other hand, recent researches on fundamental physics suggest a possibility that there may exist extra polarizations of gravitational　waves which do not live in the theory of general relativity. Our research shows that such extra polarizations can be tested even by the current four detectors. Furthermore, we present a specific condition for enabling the new test.

Free Research Field

理論宇宙物理学

Academic Significance and Societal Importance of the Research Achievements

本研究は、アインシュタインの一般相対性理論をこえる重力理論が示唆する余剰な重力波偏波の新しい検証方法を与えた。これによって、将来、新しい重力物理学が拓ける可能性が生じた。