2019A&A...630A.108S


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET03:29:12

2019A&A...630A.108S - Astronomy and Astrophysics, volume 630A, 108-108 (2019/10-1)

Proper motion in lensed radio jets at redshift 3: A possible dual super-massive black hole system in the early Universe.

SPINGOLA C., McKEAN J.P., MASSARI D. and KOOPMANS L.V.E.

Abstract (from CDS):

In this paper, we exploit the gravitational lensing effect to detect proper motion in the highly magnified gravitationally lensed source MG B2016+112. We find positional shifts up to 6 mas in the lensed images by comparing two Very Long Baseline Interferometric (VLBI) radio observations at 1.7GHz that are separated by 14.359 years, and provide an astrometric accuracy of the order of tens of µas. From lens modelling, we exclude a shift in the lensing galaxy as the cause of the positional change of the lensed images, and we assign it to the background source. The source consists of four sub-components separated by ∼175pc, with proper motion of the order of tens µas/yr for the two components at highest magnification (µ∼350) and of the order of a few mas/yr for the two components at lower magnification (µ∼2). We propose single active galactic nuclei (AGN) and dual AGN scenarios to explain the source plane. Although, the latter interpretation is supported by the archival multi-wavelength properties of the object. In this case, MG B2016+112 would represent the highest redshift dual radio-loud AGN system discovered thus far, and would support the merger interpretation for such systems. Also, given the low probability (∼10–5) of detecting a dual AGN system that is also gravitationally lensed, if confirmed, this would suggest that such dual AGN systems must be more abundant in the early Universe than currently thought.

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: active - galaxies: jets - gravitational lensing: strong - instrumentation: high angular resolution - instrumentation: interferometers - radio continuum: galaxies

VizieR on-line data: <Available at CDS (J/A+A/630/A108): list.dat fits/*>

CDS comments: Table 4 : sources not in SIMBAD.

Simbad objects: 25

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Number of rows : 25

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 CLASS B0128+437 Rad 01 31 +44.0           ~ 55 0
2 QSO J0751+2716 QSO 07 51 41.517 +27 16 31.79     18.7     ~ 73 2
3 QSO B1030+074 QSO 10 33 34.02429 +07 11 26.1478     20.34 20.22   ~ 101 1
4 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6351 3
5 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4076 3
6 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1574 2
7 QSO B1830-211 Bla 18 33 39.92 -21 03 39.9     18.70 21   ~ 567 1
8 ICRF J201811.3+083154 QSO 20 18 11.3119705 +08 31 54.546776           ~ 13 1
9 NAME MG 2016+112 System gLS 20 19 18.1 +11 27 11           ~ 13 0
10 QSO B2029+121 BLL 20 31 54.99427114 +12 19 41.3403129     18.5 17.42   ~ 135 1
11 3C 454.3 Bla 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2556 2
12 [LSS84] 2016+112 C12 LeI ~ ~           ~ 3 0
13 [LSS84] 2016+112 B5 LeI ~ ~           ~ 1 0
14 [LSS84] 2016+112 A1 LeI ~ ~           ~ 8 0
15 [LSS84] 2016+112 A3 LeI ~ ~           ~ 1 0
16 [LSS84] 2016+112 A5 LeI ~ ~           ~ 1 0
17 [LSS84] 2016+112 B2 LeI ~ ~           ~ 3 0
18 [LSS84] 2016+112 C22 LeI ~ ~           ~ 1 0
19 [LSS84] 2016+112 C11 LeI ~ ~           ~ 4 0
20 [LSS84] 2016+112 C21 LeI ~ ~           ~ 1 0
21 [LSS84] 2016+112 B3 LeI ~ ~           ~ 1 0
22 [LSS84] 2016+112 B1 LeI ~ ~           ~ 8 0
23 [LSS84] 2016+112 A4 LeI ~ ~           ~ 1 0
24 [LSS84] 2016+112 A2 LeI ~ ~           ~ 4 0
25 [LSS84] 2016+112 B4 LeI ~ ~           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2021.03.02-03:29:12

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