Prospects for Measuring the Hubble Constant with Neutron-Star–Black-Hole Mergers
Stephen M. Feeney, Hiranya V. Peiris, S. Nissanke, D. Mortlock
Abstract
Gravitational wave (GW) and electromagnetic (EM) observations of neutron-star-black-hole (NSBH) mergers can provide precise local measurements of the Hubble constant (H_{0}), ideal for resolving the current H_{0} tension. We perform end-to-end analyses of realistic populations of simulated NSBHs, incorporating both GW and EM selection for the first time. We show that NSBHs could achieve unbiased 1.5%-2.4% precision H_{0} estimates by 2030. The achievable precision is strongly affected by the details of spin precession and tidal disruption, highlighting the need for improved modeling of NSBH mergers.
Topics & Concepts
PhysicsNeutron starHubble's lawAstrophysicsStar (game theory)Black hole (networking)Constant (computer programming)Stellar black holeAstronomyNuclear physicsCosmologyGalaxyDark energyComputer networkRouting (electronic design automation)Computer scienceLink-state routing protocolProgramming languageRouting protocolPulsars and Gravitational Waves ResearchCosmology and Gravitation TheoriesAstrophysical Phenomena and Observations