Details

Autor(en) / Beteiligte

• Cao, Shuo
• Qi, Jingzhao
• Cao, Zhoujian
• Biesiada, Marek
• Li, Jin
• Pan, Yu
• Zhu, Zong-Hong

Titel

Direct test of the FLRW metric from strongly lensed gravitational wave observations

Ist Teil von

• Scientific reports, 2019-08, Vol.9 (1), p.11608-10, Article 11608

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2019

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The assumptions of large-scale homogeneity and isotropy underly the familiar Friedmann-Lemaître-Robertson-Walker (FLRW) metric that appears to be an accurate description of our Universe. In this paper, we propose a new strategy of testing the validity of the FLRW metric, based on the galactic-scale lensing systems where strongly lensed gravitational waves and their electromagnetic counterparts can be simultaneously detected. Each strong lensing system creates opportunity to infer the curvature parameter of the Universe. Consequently, combined analysis of many such systems will provide a model-independent tool to test the validity of the FLRW metric. Our study demonstrates that the third-generation ground based GW detectors, like the Einstein Telescope (ET) and space-based detectors, like the Big Bang Observer (BBO), are promising concerning determination of the curvature parameter or possible detection of deviation from the FLRW metric. Such accurate measurements of the FLRW metric can become a milestone in precision GW cosmology.