UTAPwiki/セミナー/宇宙物理学セミナー

Speaker: Atsushi Nishizawa

Title: Test of gravity with gravitational wave polarizations

Abstract:
Gravitational waves (GWs) bring forth new opportunities to test theories of gravity in strong and dynamical regimes. One of such tests is the polarizations test of GWs. GWs have only two polarization modes in general relativity, while there are at most six possible modes of polarizations in a metric theory of gravity. Therefore, GW polarizations enable us to search for anomalous deviations from general relativity in a model-independent way and provides a powerful tool to probe the strong regime of gravity. In this talk, I review the tests of gravity with GW polarizations from a basic concept to recent progresses, particularly showing how a mixture of polarization signals is separated in data analysis and how KAGRA as a fourth detector contributes to the joint observation with a global detector network.


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Last-modified: 2020-06-08 (月) 13:32:00 (104d)