Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accretion through the inner edges of protoplanetary disks by a giant
  solid state pump   At the inner edge of a protoplanetary disk solids are illuminated by stellar
light. This illumination heats the solids and creates temperature gradients
along their surfaces. Interactions with ambient gas molecules lead to a radial
net gas flow. Every illuminated solid particle within the edge is an individual
small gas pump transporting gas inward. In total the inner edge can provide
local mass flow rates as high as $\dot{M} = 10^{-5} M_{\odot}$ yr$^{-1}$.

9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con