Calibration Of [O IV] 26 Micron As A Measure Of Intrinsic AGN Luminosity

Details Calibration Of [O IV] 26 Micron As A Measure Of Intrinsic AGN Luminosity Calibration Of [O IV] 26 Micron As A Measure Of Intrinsic AGN Luminosity

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21336107r&link_type=abstract

American Astronomical Society, AAS Meeting #213, #361.07; Bulletin of the American Astronomical Society, Vol. 41, p.511

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We follow up on the demonstration of a correlation between the [O IV] 25.89 micron line luminosity and the very hard X-ray luminosity (14--195 keV) in active galactic nuclei (AGN) (Melendez et al. 2008). For the volume--limited Revised Shapley Ames Seyfert sample, we compare [O IV] line luminosities from Spitzer with hard (E>10; keV) X-ray luminosities from Swift, BeppoSAX, and Integral. We use the bolometrically--corrected hard X-ray luminosities for Seyfert 1 AGN to calibrate the [O IV] luminosity as a measure of intrinsic AGN luminosity. This calibration will be useful for high-obscuration cases like ULIRGs and Compton-thick AGN. We find that Seyfert 2s have an average L[O IV]/L(hard X-ray) ratio three times lower than that measured for Seyfert 1 AGN. The ratio for Compton-thick AGN is nine times lower. Interpreting these decrements as caused by X-ray absorption, we infer obscuring column densities for Seyfert 2 and Compton-thick AGN.

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