Hubble Frontier Fields: a high-precision strong-lensing analysis of galaxy cluster MACSJ0416.1-2403 using ∼200 multiple images

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

doi:10.1093/mnras/stu1355

Hubble Frontier Fields: a high-precision strong-lensing analysis of galaxy cluster MACSJ0416.1-2403 using ∼200 multiple images

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

Authors

Professor Mathilde Jauzac mathilde.jauzac@durham.ac.uk
Professor

B. Clément

M. Limousin

J. Richard

E. Jullo

H. Ebeling

H. Atek

J.-P. Kneib

K. Knowles

P. Natarajan

D. Eckert

E. Egami

Professor Richard Massey r.j.massey@durham.ac.uk
Professor

M. Rexroth

Abstract

We present a high-precision mass model of the galaxy cluster MACSJ0416.1-2403, based on a strong-gravitational-lensing analysis of the recently acquired Hubble Space Telescope Frontier Fields (HFF) imaging data. Taking advantage of the unprecedented depth provided by HST/Advanced Camera for Survey observations in three passbands, we identify 51 new multiply imaged galaxies, quadrupling the previous census and bringing the grand total to 68, comprising 194 individual lensed images. Having selected a subset of the 57 most securely identified multiply imaged galaxies, we use the LENSTOOL software package to constrain a lens model comprised of two cluster-scale dark-matter haloes and 98 galaxy-scale haloes. Our best-fitting model predicts image positions with an rms error of 0.68 arcsec, which constitutes an improvement of almost a factor of 2 over previous, pre-HFF models of this cluster. We find the total projected mass inside a 200 kpc aperture to be (1.60 ± 0.01) × 1014 M⊙, a measurement that offers a three-fold improvement in precision, reaching the per cent level for the first time in any cluster. Finally, we quantify the increase in precision of the derived gravitational magnification of high-redshift galaxies and find an improvement by a factor of ∼2.5 in the statistical uncertainty. Our findings impressively confirm that HFF imaging has indeed opened the domain of high-precision mass measurements for massive clusters of galaxies.

Citation

Jauzac, M., Clément, B., Limousin, M., Richard, J., Jullo, E., Ebeling, H., …Rexroth, M. (2014). Hubble Frontier Fields: a high-precision strong-lensing analysis of galaxy cluster MACSJ0416.1-2403 using ∼200 multiple images. Monthly Notices of the Royal Astronomical Society, 443(2), 1549-1554. https://doi.org/10.1093/mnras/stu1355

Journal Article Type	Article
Acceptance Date	Jun 13, 2014
Online Publication Date	Jul 23, 2014
Publication Date	Sep 11, 2014
Deposit Date	Dec 10, 2014
Publicly Available Date	Dec 16, 2014
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	443
Issue	2
Pages	1549-1554
DOI	https://doi.org/10.1093/mnras/stu1355
Keywords	Gravitational lensing: strong, Galaxies: clusters: individual: MACSJ0416.1-2403, Cosmology: observations.
Related Public URLs	http://adsabs.harvard.edu/abs/2014MNRAS.443.1549J

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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.