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arXiv · 2012.06593

Prospects for Measuring the Hubble Constant with Neutron-Star-Black-Hole Mergers

Stephen M. Feeney·Hiranya V. Peiris·Samaya M. Nissanke·Daniel J. Mortlock
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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.

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Stephen M. Feeney, Hiranya V. Peiris, Samaya M. Nissanke, Daniel J. Mortlock. 2021-04-29. Prospects for Measuring the Hubble Constant with Neutron-Star-Black-Hole Mergers. https://doi.org/10.1103/physrevlett.126.171102

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