Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Axion mechanism of Sun luminosity, dark matter and extragalactic
  background light   We show the existence of the strong inverse correlation between the temporal
variations of the toroidal component of the magnetic field in the solar
tachocline (the bottom of the convective zone) and the Earth magnetic field
(the Y-component). The possibility that the hypothetical solar axions, which
can transform into photons in external electric or magnetic fields (the inverse
Primakoff effect), can be the instrument by which the magnetic field of the Sun
convective zone modulates the magnetic field of the Earth is considered.
  We propose the axion mechanism of Sun luminosity and "solar dynamo --
geodynamo" connection, where the energy of one of the solar axion flux
components emitted in M1 transition in 57Fe nuclei is modulated at first by the
magnetic field of the solar tachocline zone (due to the inverse coherent
Primakoff effect) and after that is resonantly absorbed in the core of the
Earth, thereby playing the role of the energy modulator of the Earth magnetic
field. Within the framework of this mechanism estimations of the strength of
the axion coupling to a photon (g_{a \gamma} = 7.07e-11 1/GeV), the
axion-nucleon coupling (g_{an} = 3.20e-7), the axion-electron coupling (g_{ae}
= 5.28e-11) and the axion mass (m_a = 17eV) have been obtained. It is also
shown that the claimed axion parameters do not contradict to any known
experimental and theoretical model-independent limitations.
  We consider the effect of dark matter in the form of 17eV axions on the
extragalactic back-ground light (EBL) and find that the theoretical spectral
intensity of the EBL from decaying axions as a function of the observed
wavelength is in good agreement with the known experimental data for the near
ultraviolet, optical and near infrared bands (1500-20000 angstrom).

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The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int