Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics
We discuss some of the most unusual active galactic nuclei (AGN) discovered
to date by the Sloan Digital Sky Survey (SDSS): the first broad absorption line
quasar seen to exhibit He II absorption, several quasars with extremely strong,
narrow UV Fe II emission, and an AGN with an unexplained and very strange
continuum shape.