cosmos key questions for agn chris impey and jonathan trump steward observatory martin elvis (cfa),...
Post on 19-Dec-2015
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COSMOSKey Questions for AGN
Chris Impey and Jonathan TrumpSteward Observatory
Martin Elvis (CfA), John Huchra (CfA), Pat McCarthy (Carnegie), and Michael Westover (Harvard)
• Deep, wide-field AGN survey, down to Seyfert luminosities at z ~ 3• Bolometric measures of activity from X-ray, optical, radio and IR
data• Proxy for measure of supermassive black hole mass from broad
lines• Statistical sensitivity to rare populations (obscured, BAL, etc)• New measure of AGN clustering relative to galaxy large scale
structure• Environmental dependence of AGN luminosity and energy
distributions• Host galaxies morphologies measured out to z ~ 1 with ACS data• Populations of high redshift (z > 4) quasars with superior statistics• 3D tomography of the IGM using COS spectroscopy of brightest
quasars
COSMOS AGN SurveyScience Goals
IMACS limit
AGN locus0.1 < Fx/Fopt < 10
IMACS limit
X-Ray Selection
Secondary targets and objects with iAB > 23.5 picked up by V-COSMOS
Most efficient way to select AGN with x-ray… follow up all objects of iAB < 23.5 with IMACS
Redshift Yields and Projections• Redshifts for targets of 20 counts/pixel or more
– > Limited to i’<23.5
• Estimates from pointing 11 projected to 2 deg2
Target broad line qso all redshifts
xagn 55% 450 90% 720
ragn 25% 150 95% 620
bzk - - ~33% 10
oagn 1/7 ? 30 ~70% 160
bdrop, vdrop - - ~60% 600
idrop - - ~33% 10
highz - - ~50% 450