2012A&A...544A..71L


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.25CEST01:48:00

2012A&A...544A..71L - Astronomy and Astrophysics, volume 544A, 71-71 (2012/8-1)

Strong lensing by a node of the cosmic web. The core of MACSJ0717.5+3745 at z = 0.55.

LIMOUSIN M., EBELING H., RICHARD J., SWINBANK A.M., SMITH G.P., JAUZAC M., RODIONOV S., MA C.-J., SMAIL I., EDGE A.C., JULLO E. and KNEIB J.-P.

Abstract (from CDS):

We present results of a strong-lensing analysis of MACSJ0717.5+3745 (hereafter MACSJ0717), an extremely X-ray luminous galaxy cluster at z=0.55. Observations at different wavelengths reveal a complex and dynamically very active cluster, whose core is connected to a large scale filament extended over several Mpc. Using multi-passband imaging data obtained with the Hubble Space Telescope's Advanced Camera for Surveys (ACS), we identify 15 multiply imaged systems across the full field of view of ACS, five of which we confirmed spectroscopically in ground-based follow-up observations with the Keck telescope. We use these multiply imaged systems to constrain a parametric model of the mass distribution in the cluster core, employing a new parallelized version of the Lenstool software. The main result is that the most probable description of the mass distribution comprises four cluster-scale dark matter haloes. The total mass distribution follows the light distribution but strongly deviates from the distribution of the intra-cluster gas as traced by the X-ray surface brightness. This confirms the complex morphology proposed by previous studies. We interpret this segregation of collisional and collisionless matter as strong evidence of multiple mergers and ongoing dynamical activity. MACSJ0717 thus constitutes one of the most disturbed clusters presently known and, featuring a projected mass within the ACS field of view (R=150"=960kpc) of 2.11±0.23x1015M, the system is also one of the most massive known.

Abstract Copyright:

Journal keyword(s): gravitational lensing: strong - galaxies: clusters: individual: MACS J0717.5+3745 - large-scale structure of Universe - dark matter

Nomenclature: Fig. 2, Table 1: [LER2012] MACS J0717 NN.N N=45 among (Nos 1.1-1.5 to 18.1-18.2).

Simbad objects: 6

goto Full paper

goto View the reference in ADS

Number of rows : 6

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 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 564 0
2 ACO 520 ClG 04 54 19.0 +02 56 49           ~ 377 0
3 ClG J0717+3745 ClG 07 17 36.50 +37 45 23.0           ~ 348 0
4 B3 0714+378 Rad 07 17 36.50 +37 45 23.0           ~ 169 2
5 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 314 0
6 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1016 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2012A&A...544A..71L and select 'bookmark this link' or equivalent in the popup menu


2020.05.25-01:48:00

© Université de Strasbourg/CNRS

    • Contact