Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The effects of viscosity on the circumplanetary disks   The effects of viscosity on the circumplanetary disks residing in the
vicinity of protoplanets are investigated through two-dimensional
hydrodynamical simulations with the shearing sheet model. We find that
viscosity can affect properties of the circumplanetary disk considerably when
the mass of the protoplanet is $M_p \lesssim 33M_\oplus$, where $M_\oplus$ is
the Earth mass. However, effects of viscosity on the circumplanetary disk are
negligibly small when the mass of the protoplanet $M_p \gtrsim 33M_\oplus$. We
find that when $M_p \lesssim 33M_\oplus$, viscosity can disrupt the spiral
structure of the gas around the planet considerably and make the gas smoothly
distributed, which makes the torques exerted on the protoplanet weaker. Thus,
viscosity can make the migration speed of a protoplanet lower. After including
viscosity, size of the circumplanetary disk can be decreased by a factor of
$\gtrsim 20%$. Viscosity helps to transport gas into the circumplanetary disk
from the differentially rotating circumstellar disk. The mass of the
circumplanetary disk can be increased by a factor of 50% after viscosity is
taken into account when $M_p \lesssim 33M_\oplus$. Effects of viscosity on the
formation of planets and satellites are briefly discussed.

12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex