QSO host galaxy properties from GEMS and COSMOS from z=0 to 3
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QSO host galaxy properties from GEMS and COSMOS from z=0 to 3 Knud Jahnke Max Planck Institute for Astronomy, Heidelberg. Sebasti á n F. S á nchez (CAHA) Lutz Wisotzki (AIP) +the GEMS team. Eva Schinnerer (MPIA) Vernesa Smolcic (MPIA) Chris Impey (U Arizona) Jared Gabor (U Arizona)

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QSO host galaxy properties from GEMS and COSMOS from z=0 to 3 Knud Jahnke

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Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

QSO host galaxy properties from GEMS and COSMOS from z=0 to 3

Knud Jahnke

Max Planck Institute for Astronomy, Heidelberg

Sebastián F. Sánchez (CAHA)

Lutz Wisotzki (AIP)

+the GEMS team

Eva Schinnerer (MPIA)

Vernesa Smolcic (MPIA)

Chris Impey (U Arizona)

Jared Gabor (U Arizona)

+the COSMOS team(s)


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

  • Goals: state & evolution of QSO host galaxies

    • role in general galaxy formation

  • GEMS: 80 broad line QSOs (55 @ z<3)

    • optically selected (COMBO17)

    • photo-z‘s (COMBO17)

    • ACS imaging F606W (=V), F850LP (=z)

  • COSMOS: 120 broad line QSOs (25 March 06)

    • optically selected (SDSS & SDSS+MMT)

    • radio selected (VLA-COSMOS)

    • spectro-z‘s (IMACS, zCOSMOS, SDSS)

    • ACS imaging F814W (=i)


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

S

COSMOS

120 QSOs

Broad-line AGN sample: redshift distribution (z<3)

55 QSOs

GEMS


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

2“

500 stars

4500 stars

500 stars

F606W

(GEMS)

F814W

(COSMOS)

F850LP

(GEMS)


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

>4% of residual flux

„Resolved“ point sources: stars minus PSF

10% of objects

Frequency

Normalized subtraction residual


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

z =

0.3–0.7

0.9–1.0

1.0–1.15

1.15–1.3

1.3–1.5

1.5–1.6

1.6–1.8

1.8–1.9

1.9–2.1

2.1–2.9

COSMOS ACS F814W

4“


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

z=0.65

z=1.53

z=2.16

z=2.24


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

>4% of residual flux

Resolved QSOs: QSO minus PSF

Frequency

Normalized subtraction residual


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

z =

0.3–0.7

0.9–1.0

1.0–1.15

1.15–1.3

1.3–1.5

1.5–1.6

1.6–1.8

1.8–1.9

1.9–2.1

2.1–2.9


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

Current status & knowledge

  • COSMOS: ~50 resolved type 1 QSO hosts

  • GEMS: ~45 resolved (with optical colour)

    • Sanchez et al. 2004

    • Jahnke et al. 2004

    • Jahnke et al. (in prep)

  • Others: Kukula/Dunlop et al., Hutchings et al., Falomo et al., Kuhlbrodt et al. (at high z, 1–10 objects each)


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

GEMS & ground based colours

B&C03 (solar)

disk dominated

bulge dominated

undecided


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

GEMS z=0.7 Kormendy relation

z=0.7

z=0


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

COSMOS: host galaxy luminosities


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

COSMOS+GEMS: homogeneous inactive comparison samples

z=0.6

z=1.0


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

Radio detected

COSMOS+GEMS combined


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

Results

  • BL QSO host galaxies span colour range from reddish to blue  contribution of young stars

  • Bulge-dominated and elliptical hosts can be substantially bluer than inactive counterparts

  • Confirmed for z=0 to 1.1 (SDSS+HES+GEMS)

  • Merger/distortion fraction seems increased (to be tested!)

  • Moderate to substantial SF at z~2, similar to LBGs

  • Radio selected QSO hosts @z=1 are more luminous than optically selected


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

Diagnostic power

  • Differential host galaxy evolution compared to inactive galaxies

  • Influence of interaction on QSO activity (from merger fraction)

  • Test unified model for AGN from radio loud—quiet & type 1—type 2 comparison (luminosities, morphology)

  • QSO host galaxy parent population

  • With 2nd COSMOS HST band: spectrum of interaction strength triggering AGN activity (7/120 QSOs with NICMOS data)


Qso host galaxy properties from gems and cosmos from z 0 to 3 knud jahnke

TBD

  • Full sample definition and selection description

  • Time variable PSF

  • 2d modelling + peak subtraction

  • Morphology analysis (Galfit et al.), direct comparison to inactive sample

  • Analysis of radio properties


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