Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SPAMCART: a code for smoothed particle Monte Carlo radiative transfer   We present a code for generating synthetic SEDs and intensity maps from
Smoothed Particle Hydrodynamics simulation snapshots. The code is based on the
Lucy (1999) Monte Carlo Radiative Transfer method, i.e. it follows discrete
luminosity packets, emitted from external and/or embedded sources, as they
propagate through a density field, and then uses their trajectories to compute
the radiative equilibrium temperature of the ambient dust. The density is not
mapped onto a grid, and therefore the calculation is performed at exactly the
same resolution as the hydrodynamics. We present two example calculations using
this method. First, we demonstrate that the code strictly adheres to
Kirchhoff's law of radiation. Second, we present synthetic intensity maps and
spectra of an embedded protostellar multiple system. The algorithm uses data
structures that are already constructed for other purposes in modern particle
codes. It is therefore relatively simple to implement.

29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat