Does the Narrow [O III] 5007 Line Reflect the Stellar Velocity Dispersion in AGN?

Details Does the Narrow [O III] 5007 Line Reflect the Stellar Velocity Dispersion in AGN? Does the Narrow [O III] 5007 Line Reflect the Stellar Velocity Dispersion in AGN?

2002-11-15

arxiv.org/abs/astro-ph/0211372v1

Astrophys.J. 585 (2003) 647-652

Astronomy and Astrophysics

Astrophysics

15 pages including 2 figures, accepted for publication in Ap.J

Scientific paper

10.1086/346111

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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