Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bayesian Inference of the Symmetry Energy of Super-Dense Neutron-Rich
  Matter from Future Radius Measurements of Massive Neutron Stars   Using an explicitly isospin-dependent parametric Equation of State (EOS) for
the core of neutron stars (NSs) within the Bayesian statistical approach, we
infer the EOS parameters of super-dense neutron-rich nuclear matter from three
sets of imagined mass-radius correlation data representing typical predictions
by various nuclear many-body theories, i.e, the radius stays the same,
decreases or increases with increasing NS mass within $\pm 15\%$ between 1.4
M$_{\odot}$ and 2.0 M$_{\odot}$. The corresponding average density increases
quickly, slowly or slightly decreases as the NS mass increases from 1.4
M$_{\odot}$ to 2.0 M$_{\odot}$. Using the posterior probability distribution
functions (PDFs) of EOS parameters inferred from GW170817 and NICER radius data
for canonical NSs as references, we investigate how future radius measurements
of massive NS will improve our knowledge about the EOS of super-dense
neutron-rich nuclear matter, especially its symmetry energy term, compared to
what people have already learned from analyzing the GW170817 and NICER data.
While the EOS of symmetric nuclear matter (SNM) inferred from the three data
sets are approximately the same, the corresponding high-density symmetry
energies at densities above about $2\rho_0$ are very different, indicating that
the radii of massive NSs carry reliable information about the high-density
behavior of nuclear symmetry energy with little influence from the remaining
uncertainties of the SNM EOS.

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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: math
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat