Herschel-ATLAS: modelling the first strong gravitational lenses

Dye, S.; Negrello, M.; Hopwood, R.; Nightingale, J.W.; Bussmann, R.S.; Amber, S.; Bourne, N.; Cooray, A.; Dariush, A.; Dunne, L.; Eales, S.A.; Gonz�lez-Nuevo, J.; Ibar, E.; Ivison, R.J.; Maddox, S.; Valiante, E.

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.

Citation

Dye, S., Negrello, M., Hopwood, R., Nightingale, J., Bussmann, R., Amber, S., Bourne, N., Cooray, A., Dariush, A., Dunne, L., Eales, S., González-Nuevo, J., Ibar, E., Ivison, R., Maddox, S., & Valiante, E. (2014). Herschel-ATLAS: modelling the first strong gravitational lenses. Monthly Notices of the Royal Astronomical Society, 440, https://doi.org/10.1093/mnras/stu305

• Journal Article Type: Article
• Acceptance Date: Feb 11, 2014
• Publication Date: Apr 4, 2014
• Deposit Date: May 2, 2017
• Publicly Available Date: May 2, 2017
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 440
• DOI: https://doi.org/10.1093/mnras/stu305
• Keywords: galaxies: evolution, galaxies: structure
• Public URL: https://nottingham-repository.worktribe.com/output/727467
• Publisher URL: https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stu305
• 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.
• Contract Date: May 2, 2017