Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the relationship between auroral and nebular oxygen line intensities
  in spectra of HII regions   We investigate relationships between observed auroral and nebular oxygen line
fluxes in spectra of HII regions. We find a relation that is
metallicity-dependent at low metallicities, but becomes independent of
metallicity (within the uncertainties of the available data) above 12+logO/H ~
8.25, i.e. there is one-to-one correspondance (the ff - relation) between
auroral and nebular oxygen line fluxes in spectra of high-metallicity HII
regions. The ff - relation allows one to estimate the flux in the auroral line
from strong oxygen line measurements. This solves the problem of the electron
temperature (and, consequently, abundance) determination in high-metallicity
HII regions. The ff - relation confirms the basic idea of the empirical method,
proposed by Pagel et al. (1979) a qurter of a century ago, that the oxygen
abundance in HII region can be estimated from the strong oxygen lines
measurements only.

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The categories of this paper are: comp-gas
18
The categories of this paper are: econ
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The categories of this paper are: alg-geom
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
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The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat