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

First Resultsz~2.1 QSO z~3.6 QSO

z~1.8 QSO~30 counts/pixel

z~0.5 QSO

+ SF?

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