Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectrum of the radiation from electric charges and from dipoles which
  free infall into a black hole   The free fall of electric charges and dipoles, radial and freely falling into
the Schwarzschild black hole event horizon, was considered. Inverse effect of
electromagnetic fields on the black hole is neglected. Dipole was considered as
a point particle, so the deformation associated with exposure by tidal forces
are neglected. According to the theorem, "the lack of hair" of black holes,
multipole magnetic fields must be fully emitted by multipole fall into a black
hole. The spectrum of electromagnetic radiation power for these multipoles
(monopole and dipole) was found. Differences were found in the spectra for
different orientations of the falling dipole. A general method has been
developed to find radiated electromagnetic multipole fields for the free
falling multipoles into a black hole (including higher order multipoles -
quadrupoles, etc.). The electromagnetic spectrum can be compared with
observational data from stellar mass and smaller black holes.

10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol