Herschel-ATLAS: modelling the first strong gravitational lenses

Dye, S. and Negrello, M. and Hopwood, R. and Nightingale, J.W. and Bussmann, R.S. and Amber, S. and Bourne, N. and Cooray, A. and Dariush, A. and Dunne, L. and Eales, S.A. and González-Nuevo, J. and Ibar, E. and Ivison, R.J. and Maddox, S. and Valiante, E. (2014) Herschel-ATLAS: modelling the first strong gravitational lenses. Monthly Notices of the Royal Astronomical Society, 440 . pp. 2013-2025. ISSN 1365-2966

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Abstract

We have determined the mass density radial profiles of the first five strong gravitational lens systems discovered by the Herschel Astrophysical Terahertz Large Area Survey. We present an enhancement of the semilinear lens inversion method of Warren & Dye which allows simultaneous reconstruction of several different wavebands and apply this to dual-band imaging of the lenses acquired with the Hubble Space Telescope. The five systems analysed here have lens redshifts which span a range 0.22 ≤ z ≤ 0.94. Our findings are consistent with other studies by concluding that: (1) the logarithmic slope of the total mass density profile steepens with decreasing redshift; (2) the slope is positively correlated with the average total projected mass density of the lens contained within half the effective radius and negatively correlated with the effective radius; (3) the fraction of dark matter contained within half the effective radius increases with increasing effective radius and increases with redshift.

Item Type: Article
Additional Information: 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.
Keywords: galaxies: evolution, galaxies: structure
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1093/mnras/stu305
Depositing User: Dye, Simon
Date Deposited: 02 May 2017 12:38
Last Modified: 13 Oct 2017 01:00
URI: http://eprints.nottingham.ac.uk/id/eprint/42276

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