Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Diagnostics of inhomogeneous stellar jets: Convolution effects and data
  reconstruction   CONTEXT: In the interpretation of stellar jet observations, the physical
parameters are usually determined from emission line ratios, obtained from
spectroscopic observations or using the information contained in narrow band
images. The basic hypothesis in the interpretation of the observations is that
the emitting region is homogeneous along the line of sight. Actually, stellar
jets are in general not homogeneous, and therefore line of sight convolution
effects may lead to the main uncertainty in the determination of the physical
parameters.
  AIMS: This paper is aimed at showing the systematic errors introduced when
assuming an homogeneous medium, and studying the effect of an inhomogeneous
medium on plasma diagnostics for the case of a stellar jet. In addition, we
explore how to reconstruct the volumetric physical parameters of the jet (i.
e., with dependence both across and along the line of sight).
  METHODS: We use standard techniques to determine the physical parameters, i.
e., the electron density, temperature and hydrogen ionisation fraction across
the jet, and a multi-Gaussian method to invert the Abel transform and determine
the reconstructed physical structure.
  RESULTS: When assuming an homogeneous medium the physical parameters,
integrated along the line of sight, do not represent the average of the true
values, and do not have a clear physical interpretation. We show that when some
information is available on the emissivity profile across the jet, it is then
possible to obtain appropriate derivations of the electron density, temperature
and ionisation fraction.

13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin