Measuring parity violation in the Stochastic Gravitational Wave Background with the LISA-Taiji network

被引：45

作者：

Orlando, Giorgio ^{[1
]}

Pieroni, Mauro ^{[2
]}

Ricciardone, Angelo ^{[3
,4
]}

机构：

[1] Univ Groningen, Van Swinderen Inst Particle Phys & Grav, Nijenborgh 4, NL-9747 AG Groningen, Netherlands

[2] Imperial Coll London, Blackett Lab, London SW7 2AZ, England

[3] Univ Padua, Dipartimento Fis & Astron G Galilei, Via Marzolo 8, I-35131 Padua, Italy

[4] Ist Nazl Fis Nucl, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2021年 / 03期

基金：

欧盟地平线“2020”;

关键词：

gravitational wave detectors; gravitational waves / theory; gravitational waves / experiments;

D O I：

10.1088/1475-7516/2021/03/069

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Parity violation is a powerful observable to distinguish a cosmological background of Gravitational Waves (GWs) from an astrophysical one. Planar single GW interferometers, both on ground and in space, are unable to measure the net circular polarization of an isotropic Stochastic Gravitational Wave Background (SGWB). In this paper, we explore the possibility of detecting circular polarization of an isotropic SGWB by cross-correlating two space-based detectors planned to be launched around 2034: LISA and Taiji. We compute the response of such a network to chirality and we perform a Fisher forecast analysis on the I and V Stokes parameters for the SGWB. We find that a clear measurement of chirality can be claimed for a maximally chiral flat signal with amplitude h(2) Omega GW similar or equal to 10(-12) at the frequency scales of LISA and Taiji.

引用

页数：22

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