Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterizing the variable dust permeability of planet-induced gaps   Aerodynamic theory predicts that dust grains in protoplanetary disks will
drift radially inward on comparatively short timescales. In this context, it
has long been known that the presence of a gap opened by a planet can alter the
dust dynamics significantly. In this paper, we carry out a systematic study
employing long-term numerical simulations aimed at characterizing the critical
particle-size for retention outside a gap as a function of particle size and
for various key parameters defining the protoplanetary disk model. To this end,
we perform multifluid hydrodynamical simulations in two dimensions, including
different dust species, which we treat as pressureless fluids. We initialize
the dust outside of the planet's orbit and study under which conditions dust
grains are able to cross the gap carved by the planet. In agreement with
previous work, we find that the permeability of the gap depends both on dust
dynamical properties and the gas disk structure: while small dust follows the
viscously accreting gas through the gap, dust grains approaching a critical
size are progressively filtered out. Moreover, we introduce and compute a
depletion factor that enables us to quantify the way in which higher viscosity,
smaller planet mass, or a more massive disk can shift this critical size to
larger values. Our results indicate that gap-opening planets may act to deplete
the inner reaches of protoplanetary disks of large dust grains -- potentially
limiting the accretion of solids onto forming terrestrial planets.

2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph