EW [OIII] as an orientation indicator
Date Issued
2017
Author(s)
Abstract
We present an analysis of the average spectral properties of 12,000 SDSS quasars as a function of accretion disk inclination, as measured from the equivalent width of the [O III] 5007Å line. The use of this indicator on a large sample of quasars from the SDSS DR7 has proven the presence of orientation effects on the features of UV/optical spectra, confirming the presence of outflows in the NLR gas and that the geometry of the BLR is disk-like. Relying on the goodness of this indicator, we are now using it to investigate other bands/components of AGN. Specifically, the study of the UV/optical/IR SED of the same sample provides information on the obscuring “torus”. The SED shows an increase of the IR fraction moving from face-on to to edge-on positions, in agreement with models where the torus is coaxial with the accretion disk, and characterised by a clumpy structure.
Conferenece
Quasars at all Cosmic Epochs
Conferenece place
Padova, Italy
Conferenece date
2-7 Aprile, 2017
Ads BibCode
2017qace.confE..18B
Rights
open.access
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Poster_QAACE.pdf
Description
Poster
Size
5.35 MB
Format
Adobe PDF
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