Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical simulation of the electron capture process in a magnetar
  interior   In a superhigh magnetic field, direct Urca reactions can proceed for an
arbitrary proton concentration. Since only the electrons with high energy $E$
($E > Q$, $Q$ is the threshold energy of inverse $\beta-$decay) at large Landau
levels can be captured, we introduce the Landau level effect coefficient $q$
and the effective electron capture rate $\Gamma_{\rm eff}$. By using
$\Gamma_{\rm eff}$, the values of $L_{\rm X}$ and $L_{\rm \nu}$ are calculated,
where and $L_{\rm \nu}$, $L_{\rm X}$ are the average neutrino luminosity of
Anomalous X-ray Pulsars (AXPs) and the average X-ray luminosity of AXPs,
respectively. The complete process of electron capture inside a magnetar is
simulated numerically.

14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom