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• W2912618976 abstract "We recently proposed the equivalent width (EW) of the narrow [OIII]5007{AA} emission line as an orientation indicator for active galactic nuclei. We tested this method on about $12,300$ optically selected broad line quasars from the SDSS 7th Data Release at redshift $z < 0.8$ and with full width at half-maximum values of broad emission lines (H$alpha$, H$beta$, and MgII) larger than $2000$ km/s. We now examine their spectral energy distributions (SEDs) using broad band photometry from the near-infrared to the ultraviolet to look for variations in the overall shape as a function of the EW[OIII]. We find that quasars with low EW[OIII] values (close to face-on position) have flatter near-infrared SEDs with respect to sources with high EW[OIII] values (almost edge-on). Moreover, quasars with high EW[OIII] values show a factor of $sim 2$ lower emission in the UV to quasars with low EW[OIII] values. Our findings indicate that the torus is clumpy and, on average, co-axial with the accretion disc and broad line region, in agreement with the most recent theoretical models for the obscuring torus." @default.
• W2912618976 created "2019-02-21" @default.
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• W2912618976 date "2019-02-17" @default.
• W2912618976 modified "2023-10-18" @default.
• W2912618976 title "Orientation effects on the near-infrared broad-band emission of quasars" @default.
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• W2912618976 doi "https://doi.org/10.1093/mnras/stz495" @default.
• W2912618976 hasPublicationYear "2019" @default.
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