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AGN Workshop Columbus, OH October 1-3 2007 Discussion I • BH masses/estimators • They are good! More work to figure out how good • How to get masses out of non-BLAGN? • Does it matter for cosmology? • Obscured sources-- 1:3 vs. 10:1 • • • • • • • • Joe promises answer in 1 month Compton thick sources---still guessing Reflection component---still uncertain Does obscuration depend on luminosity or Eddington ratio? Future surveys will figure this out? Are these intrinsically different from unobscured sources? What is clustering of Ryan/Dan’s objects compared to Adam/Alison/Nikil/Joe ‘s? Ryan promises answer! Clustering as a function of black hole mass! • Discussion 2 Are we constraining accretion disk theories with local BHMF(Francesco)? • • • • How to measure this better? Is there an “issue” Nature vs. nurture? Environmental dependence, SED dependence of bias? Clustering on smallest scales • • • Is this the best evidence for “merger-driven quasar evolution”? Can they be fly-bys? Should we believe excess? (e.g. Serber et al.) What is clustering of mergers? • LRG/QSO clustering on small scales looks similar (in shape) on all scales • Can you rule out fueling mechanisms from this? • Why/IS is there an excess relative to galaxies? • Accretion of groups? host AGN? • Is “satellite-ness” the same as “merger-ness”? • More concentrated distribution of subhalos that • TESTS: HST studies of hosts (morphology); Better info on environments; evolution with redshift; Primus; imaging around SDSS binaries? Discussion 3 • Feedback matters! How to constrain differentiate between SFF and BHF? • Hot halos (after bright quasar phase)? • Galactic winds? • Ionization profiles? Kinematics of absorption systems? • Is this too tough for current hydro sims? • How much stuff is being pushed around by the BH? Not much? • Is the IGM sensitive to these processes? In what element (O, C, Mg, H, N)? • But if it’s all light, why isn’t Joe seeing the QPE? • How powerful are AGN/QSO outflows? • How to reconcile Smita’s & Xinyu’s results (Seyfert winds are just wimpy?)? • Lot’s of heat? No mass? • Timescale issue! Looking for *relic* winds. Observational Motivation for Feedback • Quasar Feedback • M-\sigma (in MDQE models) • Radio-mode AGN Feedback (is this “hot accretion” or lowL “cold accretion”) • Red & dead galaxies • Cluster cooling flows/entropy profiles • TF relation (feedback no longer goes like 1/v^2) • Jets? • X-ray cavities • Jet-induced star formation (feedback of opposite sign) • Part of “radio-mode”? • Star formation Feedback • Galactic winds • Metallicity of the IGM • Zapping star formation in small halos (get LF right)
