Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Does the Narrow [O III] 5007 Line Reflect the Stellar Velocity
  Dispersion in AGN?   It has been proposed that the width of the narrow [O III] 5007 emission line
can be used as a surrogate for the stellar velocity dispersion in active
galaxies. This proposition is tested using the SDSS EDR spectra of 107
low-redshift radio-quiet QSOs and Seyfert 1 galaxies by investigating the
correlation between black hole mass, as determined from H-beta FWHM and optical
luminosity, and [O III] FWHM. The correlation is real, but the scatter is
large. Without additional information or selection criteria, the [O III] width
can predict the black hole mass to a factor of 5.

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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
17
The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
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The categories of this paper are: dg-ga