Investigating the AGN-Merger Connection at z~2 with CANDELS - - PowerPoint PPT Presentation

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Nov 11, 2023 136 likes •405 views

Investigating the AGN-Merger Connection at z~2 with CANDELS Background Evolution of AGN Fueling Modes -2 z = 0.1 z = 0.2 z = 0.5 -4 -6 log 10 [ (M B )] [Mpc -3 mag -1 ] -8 -2 z = 0.8 z = 1.0 z = 2.0 -4 -6 -8 -16 -20 -24 -28

SLIDE 1

Investigating the AGN-Merger Connection at z~2 with CANDELS

SLIDE 2

Background

SLIDE 3

Evolution of AGN Fueling Modes

z = 0.1 log10[φ(MB)] [Mpc-3 mag-1] z = 0.2 z = 0.5

16 -20 -24 -28
8
6
4
2

z = 0.8

16 -20 -24 -28

MB z = 1.0

16 -20 -24 -28

z = 2.0 Hopkins ¡& ¡Hernquist ¡(2006) ¡

SLIDE 4

Wide Field Camera 3

Rest-Frame Optical Rest-Frame UV

V z Y J H

z=1.55

SLIDE 5

X-ray AGN in GOODS-S

Soft Source Hard Source ERS II CANDELS Deep CANDELS Wide

SLIDE 6

X-ray Luminosity Distribution

SLIDE 7

Host Morphologies

F160W (H) F775W (i)

Spheroids Disks Mergers / Interactions

Rest-Frame Optical Rest-Frame UV

V z Y J H

z=1.55

SLIDE 8

Visual Classifications

SLIDE 9

Mass-Matched Control Sample

SLIDE 10

Classification Results

SLIDE 11

AGN Still Favor Spheroids

All Disks Control AGN Pure Disks Disk + Spheroid (Disk with Bulge) Pure Spheroids All Spheroids

SLIDE 12

Standard Caveats

F160W (H) F775W (i)

Spheroids Disks Mergers / Interactions

SLIDE 13

Morphologies of Compton Thick AGN

SLIDE 14

Constraints on Time Delay Caveat

F160W (H) F775W (i)

Spheroids Disks Mergers / Interactions

SLIDE 15

Implications for AGN Fueling Models

log10[φ(MB)] [Mpc-3 mag-1]

MB

16 -20 -24 -28

z = 2.0 dΦ/d(log LX) 41 42 43 44 45 46 10-8 10-7 10-6 10-5 10-4 10-3 1.5 < z < 2.0 log(LX / erg s-1)

50% Disks 50% Disks

SLIDE 16

Alternatives to Mergers

BLACK HOLE GROWTH AND AGN OBSCURATION BY INSTABILITY-DRIVEN INFLOWS IN HIGH-REDSHIFT DISK GALAXIES FED BY COLD STREAMS

Fr´ ed´ eric Bournaud

CEA, IRFU, SAp, 91191 Gif-sur-Yvette, France; frederic.bournaud@cea.fr

Avishai Dekel

Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel; dekel@phys.huji.ac.il

SLIDE 17

Clumpy Disks Among AGN Hosts

4000A (rest)

z = 0.5 - 0.8 F775W

4000A (rest)

z = 0.8 - 1.2 F850LP z = 0.5 - 0.8 F775W

4000A (rest)

z = 1.2 - 1.9 F125W z = 0.8 - 1.2 F850LP z = 0.5 - 0.8 F775W

4000A (rest)

z = 1.9 - 2.5 F160W z = 1.2 - 1.9 F125W z = 0.8 - 1.2 F850LP z = 0.5 - 0.8 F775W

SLIDE 18

Clumpy Disks Among AGN Hosts

SLIDE 19

Clumpy Disks Among AGN Hosts

SLIDE 20

Clumpy Disks Among AGN Hosts

SLIDE 21

Clumpy Disks Among AGN Hosts

SLIDE 22

Alternatives to Mergers

F160W (H) F775W (i)

Spheroids Disks Mergers / Interactions

SLIDE 23

Conclusions

F160W (H) F775W (i)

Spheroids Disks Mergers / Interactions

SLIDE 24

SLIDE 25