Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accretion onto Black Holes and Neutron Stars: Differences and
  Similarities   Accreting black holes and neutron stars at luminosities above 0.01 of the
critical Eddington luminosity have a lot of similarities, but also drastic
differences in their radiation and power density spectra. The efficiency of
energy release due to accretion onto a rotating neutron star usually is higher
than in the case of a black hole. The theory of the spreading layer on the
surface of an accreting neutron star is discussed. It predicts the appearance
of two bright belts equidistant from the equator. This layer is unstable and
its radiation flux must vary with high frequencies.

36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th