Why X-ray--Selected AGN Appear Optically Dull

Details Why X-ray--Selected AGN Appear Optically Dull Why X-ray--Selected AGN Appear Optically Dull

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..381..438r&link_type=abstract

The Second Annual Spitzer Science Center Conference: Infrared Diagnostics of Galaxy Evolution. ASP Conference Series, Vol. 381,

Astronomy and Astrophysics

Astronomy

Scientific paper

At the conference, we presented a preliminary investigation into why half of the active galactic nuclei (AGN) selected by deep X-ray surveys lack signs of accretion in their optical spectra. We have now expanded that research as tet{rigby06}. In this proceeding, we summarize the reasons such ``optically-dull'' AGN are important, as well as our conclusions regarding the causes of optical dullness, and refer the reader to tet{rigby06} for a more in-depth discussion.

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