Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photophoresis in the circumjovian disk and its impact on the orbital
  configuration of the Galilean satellites   Jupiter has four large regular satellites called the Galilean satellites: Io,
Europa, Ganymede, and Callisto. The inner three of the Galilean satellites
orbit in a 4:2:1 mean motion resonance; therefore their orbital configuration
may originate from the stopping of the migration of Io near the bump in the
surface density distribution and following resonant trapping of Europa and
Ganymede. The formation mechanism of the bump near the orbit of the innermost
satellite, Io, is not yet understood, however. Here, we show that photophoresis
in the circumjovian disk could be the cause of the bump, using analytic
calculations of steady-state accretion disks. We propose that photophoresis in
the circumjovian disk could stop the inward migration of dust particles near
the orbit of Io. The resulting dust depleted inner region would have a higher
ionization fraction, and thus admit increased
magnetorotational-instability-driven accretion stress than the outer region.
The increase of the accretion stress at the photophoretic dust barrier would
form a bump in the surface density distribution, halting the migration of Io.

0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci