Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enrichment of the dust-to-gas mass ratio in Bondi/Jeans accretion/cloud
  systems due to unequal changes in dust and gas incoming velocities   The ratio of the Bondi and Jeans lengths is used to develop a cloud-accretion
model that describes both an inner Bondi-type regime where gas pressure is
balanced by the gravity of a central star and an outer Jeans-type regime where
gas pressure is balanced by gas self-gravity. The gas density profile provided
by this model makes a smooth transition from a wind-type inner solution to a
Bonnor-Ebert type outer solution. It is shown that high-velocity dust impinging
on this cloud will tend to pile-up due to having a different velocity profile
than gas so that the dust-to-gas ratio is substantially enriched above the 1%
ISM level.

13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg