Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Using Numerical Simulations to Gain Insight into the Structure of
  Superbubbles   Recent high resolution observations of Galactic superbubbles have motivated
us to re-examine several classes of superbubble models. We compare three
classes of hydrodynamic models (the Kompaneets approximation, the thin shell
model, and numerical simulations) in order to understand the structure of
superbubbles and to gain insight into observations. In particular, we apply
models to the W4 superbubble, which has been observed in the Pilot project of
the arcminute resolution Canadian Galactic Plane Survey (Normandeau et al.
1996). Magnetohydrodynamic simulations are also performed and point the way to
a fuller understanding of the W4 superbubble. We suggest that the highly
collimated bubble and apparent lack of a Rayleigh-Taylor instability in the
superbubble shell can be explained by the presence of a magnetic field.

35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math