Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multimessenger constraints for ultra-dense matter   Recent rapid progress in multimessenger observations of neutron stars (NSs)
offers great potential to constrain the properties of strongly interacting
matter under the most extreme conditions. In order to fully exploit the current
observational inputs and to study the impact of future observations, we analyze
a large ensemble of randomly generated model-independent equations of state
(EoSs) and the corresponding rotating stellar structures without the use of
quasi-universal relations. We discuss the compatibility and impact of various
hypotheses and measurements on the EoS, including those involving the merger
product in GW170817, the binary merger components in GW190814, and radius
measurements of PSR J0740+6620. We obtain an upper limit for the dimensionless
spin of a rigidly rotating NS, |chi| < 0.81, an upper limit for the compactness
of a NS, GM/(Rc^2) < 0.33, and find that the conservative hypothesis that the
remnant in GW170817 ultimately collapsed to a black hole strongly constrains
the EoS and the maximal mass of NSs, implying M_TOV < 2.53M_sol (or M_TOV <
2.19M_sol if we assume that a hypermassive NS was created). Furthermore, we
find that the recent NICER results for the radius of the massive PSR J0740+6620
offer strong constraints for the EoS, and that the indicated radius values for
a two-solar mass NS greater than about 11 km are completely compatible with the
presence of quark matter in massive NSs.

22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess