期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 868, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/2041-8213/aaee76
关键词
equation of state; gravitation; gravitational waves; pulsars: individual (PSR J0737-3039); stars: neutron
资金
- Natural Sciences and Engineering Research Council of Canada
- NSF [PHY 15-05124, PHY 17-08081]
- Navajbai Ratan Tata Trust
Continued observation of PSR J0737-3039, the double pulsar, is expected to yield a precise determination of its primary component's moment of inertia in the next few years. Since the moment of inertia depends sensitively on the neutron star's internal structure, such a measurement will constrain the equation of state of ultra-dense matter, which is believed to be universal. Independent equation-of-state constraints have already been established by the gravitational-wave measurement of neutron star tidal deformability in GW170817. Here, using well-known universal relations among neutron star observables, we translate the reported 90% credible bounds on tidal deformability into a direct constraint, I-* = 1.15(-0.24)(+.038) x 10(45) g cm(2), on the moment of inertia of PSR J0737-3039A. Should a future astrophysical measurement of I-* disagree with this prediction, it could indicate a breakdown in the universality of the neutron star equation of state.
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