Transcript AGN Workshop

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
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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!
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Discussion
2
Are we constraining accretion disk theories with local
BHMF(Francesco)?
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How to measure this better?
Is there an “issue”
Nature vs. nurture? Environmental dependence, SED
dependence of bias?
Clustering on smallest scales
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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?
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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)