Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structural features of sun photosphere under high spatial resolution   The main small-scale elements observed in the solar photosphere at high
resolution are discussed: granules, faculaes, micropores. As a separate element
of the fine structure, a continuous network of dark intergranular gaps is
considered. The results of image processing of micropores and faculaes knots
obtained using modern adaptive telescopes are presented. For intergranular gaps
and micropores, a stationary regime of magnetic diffusion is determined, in
which horizontal-vertical plasma flows converging to the gap (and micropores)
compensate for the dissipative spreading of the magnetic flux on a given scale.
A theoretical assessment of the characteristic scales of these structures in
the photosphere is obtained: 20-30 km for the thickness of dark intergranular
spaces and 200-400 km for the diameter of micropores.

1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ