Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Adaptive Ray Tracing for Radiative Transfer around Point Sources   We describe a novel adaptive ray tracing scheme to solve the equation of
radiative transfer around point sources in hydrodynamical simulations. The
angular resolution adapts to the local hydrodynamical resolution and hence is
of use for adaptive meshes as well as adaptive smooth particle hydrodynamical
simulations. Recursive creation of rays ensures ease of implementation. The
multiple radial integrations needed to solve the time dependent radiative
transfer are sped up significantly using a quad-tree once the rays are cast.
Simplifications advantageous for methods with one radiation source are briefly
discussed. The suggested method is easily generalized to speed up Monte Carlo
radiative transfer techniques. In summary a nearly optimal use of long
characteristics is presented and aspects of its implementation and comparison
to other methods are given.

19
The categories of this paper are: eess
16
The categories of this paper are: stat
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
37
The categories of this paper are: supr-con