Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The stellar population and the evolutionary state of HII regions and
  starburst galaxies   RHII and starbursts are both powered by massive stars. They are the main
contributors to the heating of the ISM via radiative and mechanical energy.
Techniques to derive the stellar content and the evolutionary state of RHIIs
and starbursts from their ultraviolet and optical integrated light are
reviewed. A prototypical RHII (NGC 604) and nuclear starburst (NGC 7714) are
discussed in more detail. The results reveal the necessity of multiwavelength
analyses of these objects to estimate their stellar content and their
evolutionary state in a consistent way.

28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph