NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-18 T06:31:28 PDT
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For refcode 2015ApJ...815....1U:
Retrieve 103 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2015ApJ...815....1U [O III] lambda5007 and X-Ray Properties of a Complete Sample of Hard X-Ray Selected AGNs in the Local Universe Ueda, Y.; Hashimoto, Y.; Ichikawa, K.; Ishino, Y.; Kniazev, A. Y.; Vaisanen, P.; Ricci, C.; Berney, S.; Gandhi, P.; Koss, M.; Mushotzky, R.; Terashima, Y.; Trakhtenbrot, B.; Crenshaw, M. Abstract. We study the correlation between the [O III] lambda5007 and X-ray luminosities of local active galactic nuclei (AGNs), using a complete, hard X-ray (>10 keV) selected sample in the Swift/BAT 9-month catalog. From our optical spectroscopic observations at the South African Astronomical Observatory and the literature, a catalog of [O III] lambda5007 line flux for all 103 AGNs at Galactic latitudes of | b| \gt 15^ deg is compiled. Significant correlations with intrinsic X-ray luminosity ({L}_{{X_}}) are found for both observed ({L}_[{{O_} {{III}}]}) and extinction-corrected ({L}_[{{O_} {{III}}]}^{{cor^}}) luminosities, separately for X-ray unabsorbed and absorbed AGNs. We obtain the regression form of {L}_[{{O_} {{III}}]} is proportional to \{L}_2-10\{keV_}^1.18+/- 0.07^ and {L}_[{{O_} {{III}}]}^{{cor^}} is proportional to \{L}_2-10\{keV_}^1.16+/- 0.09^ from the whole sample. The absorbed AGNs with low (<0.5%) scattering fractions in soft X-rays show on average smaller {L}_[{{O_} {{III}}]}/{L}_{{X_}} and {L}_[{{O_} {{III}}]}^{{cor^}}/{L}_{{X_}} ratios than the other absorbed AGNs, while those in edge-on host galaxies do not. These results suggest that a significant fraction of this population is buried in tori with small opening angles. By using these {L}_[{{O_} {{III}}]} versus {L}_{{X_}} correlations, the X-ray luminosity function (LF) of local AGNs (including Compton-thick AGNs) in a standard population synthesis model gives much better agreement with the [O III] lambda5007 LF derived from the Sloan Digital Sky Survey than previously reported. This confirms that hard X-ray observations are a very powerful tool to find AGNs with high completeness. Key words: galaxies: active, galaxies: Seyfert, quasars: general, X-rays: galaxies
Retrieve 103 NED objects in this reference.
Please click here for ADS abstract

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