Skip to main content

Research Repository

Advanced Search

Hubble Frontier Fields: a high-precision strong-lensing analysis of the massive galaxy cluster Abell 2744 using ∼180 multiple images

Jauzac, M.; Richard, J.; Jullo, E.; Clément, B.; Limousin, M.; Kneib, J.-P.; Ebeling, H.; Natarajan, P.; Rodney, S.; Atek, H.; Massey, R.; Eckert, D.; Egami, E.; Rexroth, M.

Hubble Frontier Fields: a high-precision strong-lensing analysis of the massive galaxy cluster Abell 2744 using ∼180 multiple images Thumbnail


Authors

J. Richard

E. Jullo

B. Clément

M. Limousin

J.-P. Kneib

H. Ebeling

P. Natarajan

S. Rodney

H. Atek

D. Eckert

E. Egami

M. Rexroth



Abstract

We present a high-precision mass model of galaxy cluster Abell 2744, based on a strong gravitational-lensing analysis of the Hubble Space Telescope Frontier Fields (HFF) imaging data, which now include both Advanced Camera for Surveys and Wide Field Camera 3 observations to the final depth. Taking advantage of the unprecedented depth of the visible and near-infrared data, we identify 34 new multiply imaged galaxies, bringing the total to 61, comprising 181 individual lensed images. In the process, we correct previous erroneous identifications and positions of multiple systems in the northern part of the cluster core. With the LENSTOOL software and the new sets of multiple images, we model the cluster using two cluster-scale dark matter haloes plus galaxy-scale haloes for the cluster members. Our best-fitting model predicts image positions with an rms error of 0.79 arcsec, which constitutes an improvement by almost a factor of 2 over previous parametric models of this cluster. We measure the total projected mass inside a 200 kpc aperture as (2.162 ± 0.005) × 1014 M⊙, thus reaching 1 per cent level precision for the second time, following the recent HFF measurement of MACSJ0416.1−2403. Importantly, the higher quality of the mass model translates into an overall improvement by a factor of 4 of the derived magnification factor. Together with our previous HFF gravitational lensing analysis, this work demonstrates that the HFF data enables high-precision mass measurements for massive galaxy clusters and the derivation of robust magnification maps to probe the early Universe.

Citation

Jauzac, M., Richard, J., Jullo, E., Clément, B., Limousin, M., Kneib, J., …Rexroth, M. (2015). Hubble Frontier Fields: a high-precision strong-lensing analysis of the massive galaxy cluster Abell 2744 using ∼180 multiple images. Monthly Notices of the Royal Astronomical Society, 452(2), 1437-1446. https://doi.org/10.1093/mnras/stv1402

Journal Article Type Article
Acceptance Date Jun 23, 2015
Online Publication Date Jul 14, 2015
Publication Date Sep 11, 2015
Deposit Date Dec 10, 2014
Publicly Available Date Mar 24, 2015
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 452
Issue 2
Pages 1437-1446
DOI https://doi.org/10.1093/mnras/stv1402
Keywords Gravitational lensing: strong, Galaxies: clusters: individual: Abell 2744, Cosmology: observations.
Related Public URLs http://adsabs.harvard.edu/abs/2014arXiv1409.8663J

Files

Published Journal Article (6.6 Mb)
PDF

Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.






You might also like



Downloadable Citations