Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Line temperatures and elemental abundances in HII galaxies   We present long-slit spectrophotometric observations in the red and near
infrared of 12 HII galaxies. The spectral range includes the sulphur lines
[SII] at wavelengths 6716, 6731 angstroms and [SIII] at 6312 angstroms and
9069, 9532 angstroms. For all of the observed galaxies, at least three
ion-weighted temperatures from forbidden auroral to nebular line ratios have
been obtained and the relations between the different line temperatures have
been discussed. It is found that, for some objects, the [OII] temperatures
derived from those of [OIII] through the use of photo-ionisation models,
without taking into account the effect of density, can lead to a significant
underestimate of the O+/H+ ionic abundance and hence of the total oxygen
abundance.

33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph