2001A&A...367..741S


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.31CET21:09:32

2001A&A...367..741S - Astronomy and Astrophysics, volume 367, 741-747 (2001/3-1)

Spectroscopic confirmation of a cluster of galaxies at (z=1) in the field of the gravitational lens MG 2016+112.

SOUCAIL G., KNEIB J.-P., JAUNSEN A.O., HJORTH J., HATTORI M. and YAMADA T.

Abstract (from CDS):

We present new optical data on the cluster AX J2019+1127 identified by the X-ray satellite ASCA at z∼1 (Hattori, 1997Natur.388..146H). The data suggest the presence of a high-redshift cluster of galaxies responsible for the large separation triple quasar MG 2016+112. Our deep photometry reveals an excess of z∼1 galaxy candidates, as already suspected by (Benitez, 1999ApJ...527...31B). Our spectroscopic survey of 44 objects in the field shows an excess of 6 red galaxies securely identified at z∼1, with a mean redshift of z =1.005±0.002. We estimate a velocity dispersion of σ=771+430–160km/s based on these 6 galaxies and a V-band mass-to-light ratio of 215+308–77h50(M/LV). Our observations thus confirm the existence of a massive structure acting as the lens, which explains the unusual configuration of the triple quasar. Hence, there is no need to invoke the existence of a ``dark cluster'' to understand this lens system.

Abstract Copyright:

Journal keyword(s): cosmology: observations - dark matter - galaxies: clusters: general - galaxies: clusters: individual: MG 2016+112 - gravitational lensing - X-rays: galaxies

Nomenclature: Table 1: [SKJ2001] MN.NNa N=31.

CDS comments: MG 2016+112 = MITG J2019+1127. Components 'A' = [LSS84] 2016+112 A in SIMBAD.

Simbad objects: 40

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Number of rows : 40

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [S71b] V50 Ir* 01 04 35.49 +02 06 50.2           ~ 3 0
2 [S71b] V63 V* 01 04 40.8 +02 01 03           ~ 2 0
3 QSO B0908+0603 QSO 09 11 27.6052 +05 50 54.281   18.44 18.16     ~ 210 2
4 8C 0958+561 QSO 10 01 20.6915852239 +55 53 55.595776916   17.16 16.95     ~ 701 3
5 QSO J1415+1129 QSO 14 15 46.25 +11 29 43.4   17.63 17.23     ~ 599 1
6 [SKJ2001] M2.3 G 20 19 10.98 +11 25 31.0           ~ 1 0
7 [SKJ2001] M2.4 G 20 19 12.87 +11 26 39.4           ~ 1 0
8 [SKJ2001] M1.5 G 20 19 12.90 +11 28 11.5           ~ 1 0
9 [SKJ2001] M2.5 G 20 19 13.37 +11 26 31.5           ~ 1 0
10 [SKJ2001] M1.6 G 20 19 13.51 +11 28 13.7           ~ 1 0
11 [SKJ2001] M1.7 G 20 19 15.02 +11 27 08.8           ~ 1 0
12 [SKJ2001] M2.7 G 20 19 15.10 +11 28 07.8           ~ 1 0
13 [SKJ2001] M1.8 G 20 19 15.80 +11 27 44.4           ~ 1 0
14 [SKJ2001] M2.8 G 20 19 16.19 +11 26 40.5           ~ 1 0
15 [SKJ2001] M1.9 G 20 19 16.43 +11 27 18.2           ~ 1 0
16 [SKJ2001] M2.9 GiC 20 19 17.06 +11 26 47.8           ~ 1 0
17 [SKJ2001] M1.11a G 20 19 17.79 +11 27 13.1           ~ 1 0
18 [SKJ2001] M1.11b G 20 19 17.99 +11 27 13.4           ~ 1 0
19 ClG J2019+1127 ClG 20 19 18.0 +11 27 13           ~ 38 0
20 QSO B2016+112B QSO 20 19 18.0 +11 27 13     22.5     ~ 32 0
21 [LSS84] 2016+112 C LeI 20 19 18.036 +11 27 11.44           ~ 17 0
22 [SKJ2001] M2.10 G 20 19 18.05 +11 27 11.6           ~ 1 0
23 [LSS84] 2016+112 D G 20 19 18.07 +11 27 13.2           ~ 34 1
24 QSO B2016+112 QSO 20 19 18.2 +11 27 14     22.5     ~ 192 1
25 [SKJ2001] M2.11 G 20 19 18.75 +11 27 19.8           ~ 1 0
26 [SKJ2001] M1.12 G 20 19 18.98 +11 28 45.0           ~ 1 0
27 [SKJ2001] M1.13 G 20 19 19.54 +11 27 01.4           ~ 1 0
28 [SKJ2001] M2.12 G 20 19 20.14 +11 26 48.4           ~ 1 0
29 [SKJ2001] M2.13a G 20 19 20.78 +11 27 17.7           ~ 1 0
30 [SKJ2001] M2.13b G 20 19 20.83 +11 27 17.4           ~ 1 0
31 [SKJ2001] M1.15 G 20 19 21.30 +11 27 29.9           ~ 1 0
32 [SKJ2001] M2.14 G 20 19 21.82 +11 26 49.5           ~ 1 0
33 [SKJ2001] M1.16 G 20 19 22.24 +11 27 30.2           ~ 1 0
34 [SKJ2001] M2.15 G 20 19 22.32 +11 26 17.1           ~ 1 0
35 [SKJ2001] M1.17 G 20 19 22.98 +11 27 26.4           ~ 1 0
36 [SKJ2001] M2.16 G 20 19 23.28 +11 26 06.7           ~ 1 0
37 [SKJ2001] M1.18 G 20 19 23.47 +11 28 15.6           ~ 1 0
38 [SKJ2001] M2.17 G 20 19 23.88 +11 26 26.1           ~ 1 0
39 [SKJ2001] M1.19 G 20 19 24.55 +11 27 44.5           ~ 1 0
40 [SKJ2001] M2.1 G ~ ~           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.10.31-21:09:32

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