2018A&A...614L...2H


Query : 2018A&A...614L...2H

2018A&A...614L...2H - Astronomy and Astrophysics, volume 614, L2-2 (2018/6-1)

Cosmic dance at z ∼ 3: Detecting the host galaxies of the dual AGN system LBQS 0302-0019 and Jil with HAWK-I+GRAAL.

HUSEMANN B., BIELBY R., JAHNKE K., ARRIGONI-BATTAIA F., WORSECK G., SHANKS T., WARDLOW J. and SCHOLTZ J.

Abstract (from CDS):

We recently discovered that the luminous radio-quiet quasi-stellar objects (QSO) LBQS 0302-0019 at z = 3.286 is likely accompanied by an obscured AGN at 20 kpc projected distance, which we dubbed Jil. It represents the tightest candidate system of an obscured and unobscured dual AGN at z > 3. To verify the dual AGN scenario, we obtained deep Ks band (rest-frame V band) imaging with the VLT/HAWK-I+GRAAL instrument at 0.''4 resolution during science verification in January 2018. We detect the individual host galaxies of the QSO and Jil with estimated stellar masses of log(M*/M) = 11.4 ± 0.5 and log(M*/M) = 0.9 ± 0.5, respectively. Near-IR spectra obtained with Very Large Telescope-K-band Multi Object Spectrograph (VLT-KMOS) reveal a clear [OIII] λ5007 line detection at the location of Jil that does not contribute significantly to the Ks band flux. Both observations therefore corroborate the dual AGN scenario. A comparison to Illustris simulations suggests a parent halo mass of log(Mhalo/M) = 13.2 ± 0.5 for this interacting galaxy system, corresponding to a massive dark matter halo at that epoch.

Abstract Copyright: © ESO 2018

Journal keyword(s): Galaxies: interactions - Galaxies: high-redshift - large-scale structure of Universe - instrumentation: adaptive optics - quasars: individual: LBQS 0302-0018

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 LBQS 0302-0019 QSO 03 04 49.8593341368 -00 08 13.534398816   18.08 17.80 17.5   ~ 249 0
2 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2685 0

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2023.02.09-11:22:50

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