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The Science Case for LIGO-India

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arxiv 2105.01716 v2 pith:EJX4CR6U submitted 2021-05-04 gr-qc astro-ph.HE

classification gr-qcastro-ph.HE
keywords willdetectorsnetworkexpansiongloballigomultipleastrophysical
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The global network of gravitational-wave detectors has completed three observing runs with $\sim 50$ detections of merging compact binaries. A third LIGO detector, with comparable astrophysical reach, is to be built in India (LIGO-Aundha) and expected to be operational during the latter part of this decade. Multiple detectors operating at different parts of the globe will provide several pairs of interferometers with longer baselines and an increased network SNR. This will improve the sky localisation of GW events. Multiple detectors simultaneously in operation will also increase the baseline duty factor, thereby, leading to an improvement in the detection rates and, hence, the completeness of surveys. In this paper, we quantify the improvements due to the expansion of the LIGO Global Network (LGN) in the precision with which source properties will be measured. We also present examples of how this expansion will give a boost to tests of fundamental physics.

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