Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A study of neutron stars in $D \ge 4$ dimensions   The relativistic equations of hydrostatic equilibrium for a spherically
symmetric star, or the Tolman-Oppenheimer-Volkoff equations are known in higher
dimensions. In this paper, these equations have been expressed in terms of
parameters of 4 dimensional spacetime and solved numerically for 4, 5, 6, and 7
dimensions using a standard equation of state for the neutron star matter
derived for the 4 dimensional spacetime. It has been shown that with the
increase of the dimensionality, the maximum value of the mass of the neutron
star decreases and the stars become less compact. Thus, although the
compactness limit decreases with increased dimensionality, neutron stars never
violate this limit. Simultaneous measurements of the mass, radius, and
gravitational redshift for a neutron star might enable us to conclude about the
central density, equation of state and the dimensionality of the spacetime in
and around the star.

11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org