Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spreading pressure bumps in gas-dust discs can stall planet migration
  via planet-vortex interactions   We investigate the gravitational interaction between low- to
intermediate-mass planets ($M_p \in[0.06-210]\,M_{\oplus}$) and two previously
formed pressure bumps in a gas-dust protoplanetary disc. We explore how the
disc structure changes due to planet-induced perturbations and also how the
appearance of vortices affects planet migration. We use multifluid 2D
hydrodynamical simulations and the dust is treated in the pressureless-fluid
approximation, assuming a single grain size of $5\,\mu{\mathrm{m}}$. The
initial surface density profiles containing two bumps are motivated by recent
observations of the protoplanetary disc HD163296. When planets are allowed to
migrate, either a single planet from the outer pressure maximum or two planets
from each pressure maximum, the initial pressure bumps quickly spread and merge
into a single bump which is radially wide and has a very low amplitude. The
redistribution of the disc material is accompanied by the Rossby Wave
Instability (RWI) and an appearance of mini-vortices that merge in a short
period of time to form a large vortex. The large vortex induces perturbations
with a spiral wave pattern that propagate away from the vortex as density
waves. We found that these vortex-induced spiral waves strongly interact with
the spiral waves generated by the planet and we called this mechanism the
"\textit{Faraway Interaction}". It facilitates much slower and/or stagnant
migration of the planets and it excites their orbital eccentricities in some
cases. Our study provides a new explanation for how rocky planets can come to
have a slow migration in protoplanetary discs where vortex formation occurs.

31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin