Silicate Emission in AGN: Emission from the Torus or (and) Extended Emission?

Details Silicate Emission in AGN: Emission from the Torus or (and) Extended Emission? Silicate Emission in AGN: Emission from the Torus or (and) Extended Emission?

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..373..501s&link_type=abstract

The Central Engine of Active Galactic Nuclei, ASP Conference Series, Vol. 373, proceedings of the conference held 16-21 October,

Computer Science

Scientific paper

Spitzer spectroscopy has recently given a new boost to AGN studies by detecting long-sought silicate emission features in quasars, but it remains uncertain how they can be interpreted in unified scenarios. Hot silicate emission may arise from a compact torus, but the moderate temperature of the actually observed silicate emission and our detection of this feature in QSO-2s argue for a more extended nature. Support for this comes from our recent detection of extended silicate emission in the low-luminosity LINER NGC 3998 and spectral modelling of our QSO-1 sample.

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