Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The effect of a density dependent bag constant on the structure of hot
  neutron star with a quark core   As we go from center toward the surface of a neutron star, the state of
baryonic matter changes from the de-confined quark-gluon to a mixed phase of
quark and hadronic matter, and a thin crust of hadronic matter. For the quark
matter, within MIT bag model, the total energy density of the system is the
kinetic energy for non-interacting quarks plus a bag constant. In this article
first we have considered a density dependent bag constant obtained using the
recent experimental results of CERN SPS on the formation of a quark-gluon
plasma. For calculations of the hadron phase, we use the lowest order
constrained variational method. The equation of state of mixed phase has been
determined using Gibbs conditions. Finally, we have calculated the structure of
a hot neutron star with quark core employing TOV equation. Our results show
that a density dependent bag constant leads to a higher mass and lower radius
for the hot neutron star with respect to the case in which we use a fixed bag
constant.

13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci