TY - JOUR
T1 - Multimessenger constraints on the neutron-star equation of state and the Hubble constant
AU - Dietrich, Tim
AU - Coughlin, Michael W.
AU - Pang, Peter T.H.
AU - Bulla, Mattia
AU - Heinzel, Jack
AU - Issa, Lina
AU - Tews, Ingo
AU - Antier, Sarah
N1 - Publisher Copyright:
© 2020 American Association for the Advancement of Science. All rights reserved.
PY - 2020/12/18
Y1 - 2020/12/18
N2 - 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 11:75þ0:86_0:81 km at 90% confidence and the Hubble constant is 66:2þ4:4_4:2 at 1s uncertainty.
AB - 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 11:75þ0:86_0:81 km at 90% confidence and the Hubble constant is 66:2þ4:4_4:2 at 1s uncertainty.
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U2 - 10.1126/science.abb4317
DO - 10.1126/science.abb4317
M3 - Article
C2 - 33335061
AN - SCOPUS:85098675438
SN - 0036-8075
VL - 370
SP - 1450
EP - 1453
JO - Science
JF - Science
IS - 6523
ER -