2001A&A...369...16C


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST21:17:56

2001A&A...369...16C - Astronomy and Astrophysics, volume 369, 16-25 (2001/4-1)

Weak lensing observations of the ``dark'' cluster MG 2016+112.

CLOWE D., TRENTHAM N. and TONRY J.

Abstract (from CDS):

We investigate the possible existence of a high-redshift (z=1) cluster of galaxies associated with the QSO lens system MG 2016+112. From an ultra-deep R- and less deep V- and I-band Keck images and a K-band mosaic from UKIRT, we detect ten galaxies with colors consistent with the lensing galaxy within 225h–1kpc of the z=1.01 lensing galaxy. This represents an overdensity of more than ten times the number density of galaxies with similar colors in the rest of the image. We also find a group of seven much fainter objects closely packed in a group only 27h–1kpc north-west of the lensing galaxy. We perform a weak lensing analysis on faint galaxies in the R-band image and detect a mass peak of a size similar to the mass inferred from X-ray observations of the field, but located 64" northwest of the lensing galaxy. From the weak lensing data we rule out a similar sized mass peak centered on the lensing galaxy at the 2σ level.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: MG 2016+112 - galaxies: clusters: individual: AX J2019+112 - dark matter - gravitational lensing

Nomenclature: Fig.4: [CTT2001] BN (Nos B1-B9), [CTT2001] N (Nos 1-3).

CDS comments: MG 2016+112 = MITG J2019++1127

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 324 0
2 ClG 1137+66 ClG 11 40 23.3 +66 09 01     21.0     ~ 134 0
3 ClG J1716+6708 ClG 17 16 49.6 +67 08 30           ~ 112 0
4 QSO B2016+112B QSO 20 19 18.0 +11 27 13     22.5     ~ 32 0
5 ClG J2019+1127 ClG 20 19 18.0 +11 27 13           ~ 38 0
6 [LSS84] 2016+112 C LeI 20 19 18.036 +11 27 11.44           ~ 17 0
7 [LSS84] 2016+112 D G 20 19 18.051 +11 27 12.88           ~ 33 1
8 QSO B2016+112 QSO 20 19 18.2 +11 27 14     22.5     ~ 191 1

    Equat.    Gal    SGal    Ecl

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2019.10.23-21:17:56

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