期刊
SCIENCE
卷 370, 期 6523, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abb4317
关键词
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资金
- European Union [749145]
- National Science Foundation [PHY-2010970, NSF1757388]
- Netherlands Organization for Scientific Research (NWO)
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC52-06NA25396]
- Laboratory Directed Research and Development program of Los Alamos National Laboratory [20190617PRD1]
- U.S. Department of Energy, Office of Science, Office of Advanced Scientific Computing Research, Scientific Discovery through Advanced Computing (SciDAC) program
- CNES Postdoctoral Fellowship at Laboratoire Astroparticle et Cosmologie
- Gauss Centre for Supercomputing e.V.
- Minerva HPC cluster of the Max Planck Institute for Gravitational Physics, on SuperMUC-NG (LRZ) [pn56zo]
- HAWK (HLRS) [44189]
- U.S. Department of Energy National Nuclear Security Administration [89233218CNA000001]
- U.S. Department of Energy, Office of Science [DE-AC02-05CH11231]
Observations of neutron-star mergers with distinct messengers, including gravitational waves and electromagnetic signals, can be used to study the behavior of matter denser than an atomic nucleus and to measure the expansion rate of the Universe as quantified by the Hubble constant. We performed a joint analysis of the gravitational-wave event GW170817 with its electromagnetic counterparts AT2017gfo and GRB170817A, and the gravitational-wave event GW190425, both originating from neutron-star mergers. We combined these with previous measurements of pulsars using x-ray and radio observations, and nuclear-theory computations using chiral effective field theory, to constrain the neutron-star equation of state. We found that the radius of a 1.4-solar mass neutron star is 11.75(-0.81)(+0.86) km at 90% confidence and the Hubble constant is 66.2(-4.2)(+4.4) at 1 sigma uncertainty.
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