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Michael Strauss

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n Very few high-luminosity Type II quasars are known.<br />

Essentially all high-luminosity objects show broad<br />

lines.<br />

n If the unification model is correct, then Type II<br />

quasars must exist at high luminosity.<br />

Characteristics:<br />

n Characteristics:<br />

n Weak or absent non-thermal continuum<br />

n Strong narrow high-ionization emission lines<br />

n So we went to look for such objects in SDSS!<br />

(Nadia ( Nadia Zakamska, Zakamska,<br />

PhD Thesis, 2005)<br />

2005

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