Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Distortion of neutron stars with a toroidal magnetic field   Models of rotating relativistic stars with a toroidal magnetic field have
been computed for a sample of eight equations of state of cold dense matter.
Non-rotating models admit important levels of magnetization and quadrupole
distortion accompanied by a seemingly unlimited growth in size. Rotating models
reach the mass-shedding limit at smaller angular velocities than in the
non-magnetized case according to the larger circumferential equatorial radius
induced by the magnetic field. Moreover, they can be classified as
prolate-prolate, oblate-prolate, or oblate-oblate with respect to surface
deformation and quadrupole distortion. Simple expressions for surface and
quadrupole deformation are provided that are valid up to magnetar field
strengths and rapid rotation.

29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin