2. What do you know about dust in Active Galaxies and AGN? Where is it, how is it distributed, what temperatures does it have, how do we measure it, .....?
3. Suppose you wish to discover the most distant quasar - how would you do this?
4. Roughly every QSO at ~10 billion lightyears distance displays one heavy element absorption line system, due to the disk of a spiral galaxy. Given that the local space density of normal spiral galaxies is 0.02 per cubic Mpc, what does the absorption line result tell you?
5. a. Draw a sketch of a radio-loud active galaxy, marking the physical mechanisms that play a role in unified schemes for these objects. Mark also the zones/regions that are important in this respect.
b. Examine the diagram below, which displays the inferred size of the broad (Balmer) line region as a function of AGN continuum luminosity (you have seen it before). Apply your knowledge of the results of reverberation mapping to discuss the possible geometry of the hydrogen gas in the broad line region. Given your sketch in 5a how could we test this proposed geometry?