1. Open Questions in AGN Research Hagai Netzer, Tel Aviv University  Metallicity at all z  The iron saga  The AGN starburst connection  The unfinished list

2. Metallicity at all z NV Gary Ferland Fred Hamann Roberto Maiolino Stephanie Komossa Ohad Shemmer Hagai Netzer The obsessed

3. Z-LZ-M BH Metallicity, Luminosity and Mass relationships Hamann and Ferland 1993, 1999 and collaborators Shemmer and Netzer 2002 (NLS1s spoil the Z-L correlation)

4. Accretion rate and metallicity Shemmer, Netzer, Maiolino.. 2004 Z=5 Z=1

5. The iron saga Freudling et al. 2003 Bev Wills Gary Ferland Fred Hamann Dan Maoz Hagai Netzer …….. The obsessed

6. FeII lines in intermediate z QSOs Wills, Netzer, Wills 1985 Present day models cannot tell whether the FeII line intensities reflect the iron abundance, the gas density and optical depth or, perhaps, some other unknown factors Netzer and Wills 1983 Wills, Netzer, Wills 1985 Verner et al. 1999 Baldwin et al 2004

7. Mass metallicity and accretion rate at low z  The Sloan Digital Sky Survey (SDSS) –13,000 type-I AGN up to z<0.75 –Mass and accretion rate for all –Careful de-blending of FeII lines Z=0.75 Netzer and Trakhtenbrot 2006

8. BH mass in SDSS AGN Netzer and Trakhtenbrot 2006

9. L/L Edd vs. luminosity M=10 7 M=10 8 M=10 9

10. Optical FeII lines Boroson (2001) FeII What determines the FeII/H line ratio?

11. FeII/H  vs. L/L Edd FeII/H increases with accretion rate at a given z Answer: FeII/H depends on the iron abundance

12. The AGN starburst connection Madau plot (Cole et al. 2001) The obsessed Everybody in the audience

13. Chapter A: XMM-Newton NGC 6240 + M82 NGC 6240

14. NGC 6240: Netzer, Lemze et al 2005 AGN starburst

15. The AGN-starburst connection Chapter B: Spitzer MPE, UMCP, TAU, … 2006

17. Open Questions in AGN Research Summary  Metallicity at all z - –probably driven by accretion rate  The iron saga – –FeII/H probably reflects the iron abundance  The AGN starburst connection – –Powerful starbursts accompany BH activity at most L  The unfinished list - –Another open question –Another open question …