Detecting additional polarization modes with LISA

11th International LISA Symposium

Philippoz, L.^1 ; Jetzer, P.^1

Physik-Institut, Universitat Zürich, Winterthurerstrasse 190, Zürich

8057, Switzerland^1

关键词: Additional mode;    General Relativity;    Polarization modes;    Scalar modes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/840/1/012057/pdf
DOI  :  10.1088/1742-6596/840/1/012057

来源: IOP

【 摘 要 】

Within the frame of Einstein's General Relativity, gravitational waves are expected to possess two tensorial polarizations, namely the well-known h+and h×modes, whereas more general metric theories of gravity however allow the existence of additional modes (up to two vector and two scalar modes). The (non-)observation of those additional polarizations could put constraints on alternative theories and consequently provide a further test for General Relativity. We address the question of whether a given LISA configuration can provide a sufficient sensitivity to detect additional polarization modes and then allow the extraction of the latter in order to determine the GW spectrum for each mode.