Cosmography with bright and Love sirens

• DOI: 10.48550/arxiv.2212.13183
• Publication Date: 2022-01-01
• Authors: Arnab Dhani; Ssohrab Borhanian; Anuradha Gupta; B. S. Sathyaprakash
• Keywords: Einstein Telescope

Precision cosmology is crucial to understand the different energy components in Universe and their evolution through cosmic time. Gravitational wave sources are standard sirens that can accurately map out distances Universe. Together with source redshift information, we then probe expansion history of We explore capabilities various gravitational-wave detector networks constrain cosmological models while employing separate waveform for inspiral post-merger part gravitational signal from equal mass binary neutron stars. consider two avenues measure a source: first, examine an electromagnetic measurement via either kilonova or gamma ray burst detection following star merger (the counterpart method); second, estimate itself adiabatic tides between component stars characterized by tidal Love number, provide second mass-scale break mass-redshift degeneracy counterpart-less method). find method better suited Hubble constant places more stringent bounds on other parameters. In era next-generation networks, both methods achieve sub-percent $H_0$ after one year observations. The dark matter density parameter $\Omega_{\rm M}$ $\Lambda$CDM model be measured at percent-level precision using method, whereas achieves precision. We, however, do not postmerger contribute significantly these measurements.