Open AccessThe Moment of Inertia of the Binary Pulsar J0737-3039A: Constraining the Nuclear Equation of State
Author(s) -
Ian A. Morrison,
Thomas W. Baumgarte,
S. L. Shapiro,
V. R. Pandharipande
Publication year - 2004
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/427235
Subject(s) - pulsar , moment of inertia , physics , neutron star , equation of state , radius , binary pulsar , binary number , spins , moment (physics) , classical mechanics , rotation (mathematics) , nuclear matter , statistical physics , astrophysics , millisecond pulsar , nuclear physics , quantum mechanics , nucleon , mathematics , geometry , computer security , arithmetic , computer science , condensed matter physics
We construct numerical models of the newly discovered binary pulsarJ0737-3039A, both with a fully relativistic, uniformly rotating, equilibriumcode that handles arbitrary spins and in the relativistic, slow-rotationapproximation. We compare results for a representative sample of viable nuclearequations of state (EOS) that span three, qualitatively different, classes ofmodels for the description of nuclear matter. A future dynamical measurement ofthe neutron star's moment of inertia from pulsar timing data will imposesignificant constraints on the nuclear EOS. Even a moderately accuratemeasurement (<~ 10 %) may be able to rule out some of these competing classes.Using the measured mass, spin and moment of inertia to identify the optimalmodel computed from different EOSs, one can determine the pulsar's radius.Comment: 4 pages, ApJL in pres
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