期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 852, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/2041-8213/aaa401
关键词
equation of state; gravitational waves; methods: analytical; stars: neutron
资金
- NewCompStar, COST Action [MP1304]
- LOEWE-Program in HIC for FAIR
- European Union's Horizon Research and Innovation Programme (FETHPC-1, project ExaHyPE) [671698]
- ERC Synergy Grant BlackHoleCam: Imaging the Event Horizon of Black Holes [610058]
Combining the GW observations of merging systems of binary neutron stars and quasi-universal relations, we set constraints on the maximum mass that can be attained by nonrotating stellar models of neutron stars. More specifically, exploiting the recent observation of the GW event GW170817 and drawing from basic arguments on kilonova modeling of GRB 170817A together with the quasi-universal relation between the maximum mass of nonrotating stellar models M-TOV and the maximum mass supported through uniform rotation M-max = (1.20(-0.05)(+0.02)) M-TOV, we set limits for the maximum mass to be 2.01(-0.04)(+0.04) <= M-TOV/M-circle dot less than or similar to 2.16(-0.15)(+0.17), where the lower limit in this range comes from pulsar observations. Our estimate, which follows a very simple line of arguments and does not rely on the modeling of the electromagnetic signal in terms of numerical simulations, can be further refined as new detections become available. We briefly discuss the impact that our conclusions have on the equation of state of nuclear matter.
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