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How does obscuration of AGN fit into black hole-galaxy evolutionary models?
What are the connections between obscuration and star formation?
#monsters16
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How much evidence is there that obscured
AGN reside in different galaxies compared to
unobscured AGN?
#monsters16
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Kocevski+ 2015 log stellar mass (M☉)
X-ray undetected IRAGNX-ray detected IRAGN
All X-ray AGN (C-COSMOS)
Rosario+ in prep. See also Azadi+
Check to see if your obscured AGN selection is co-variant with galaxy properties.
MIR selected AGN will be biased to low masses.How about X-ray obscured AGN?
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Rosario+ 2012
Merloni+ 2014Shimizu+ 2015
Z~1-2
Z=0
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How much evidence is there that obscured AGN
reside in different evolutionary phases
compared to unobscuredAGN?
#monsters16
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– Georg Hegel
“No person can surpass their own time, for the spirit of their time is
also their own spirit.”
Zeitgeist
I’ll bet he never met any astronomers!
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I don’t think there is a dichotomy between AGN unification and an evolutionary sequence.
There are no QSOs without hot (≳ 800 K) dust, so a fractal torus (or “fracas”)
always exists, independent of the situation of the large-scale galaxy.
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Urrutia+ 2008
Kocevski+ 2015
Satyapal+ 2014
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Treister+ 2012
Villforth+ 2016
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Stanley+ 2015
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Some responses
… at least a slight bias towards there being different environments for obscured and unobscured AGN (e.g., obscured AGN more likely to be found in starburst galaxies simply because of the greater amount of dust and hence higher probability of any line of sight towards the nucleus being obscured).
… some evidence that the host obscuration alone is significant and stellar-mass dependent.
obscured objects will be more common in the intrinsically high CF objects, and the opposite for the unobscured AGN.
… obscured AGN must preferentially reside in SF galaxies. In non SF galaxies they are more likely to reside in high metallicity hosts, where the dust/gas ratio is higher.
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Unsynchronised Co-evolution:Supply-side economics of the AGN-galaxy connection
Both galaxy and SMBH grow together
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How much evidence is there that obscured
AGN reside in different environments compared
to unobscured AGN?
#monsters16
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Stanley+ 2015
Rosario+ 2015
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How can we use abnormal sources to
shed light on the nature of obscured
AGN?
#monsters16
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Sobolewska+ 2011
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