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Modelling high resolution ALMA observations of strongly lensed highly star forming galaxies detected by Herschel

Dye, S.; Furlanetto, C.; Dunne, L.; Eales, S. A.; Negrello, M.; Nayyeri, H.; van der Werf, P. P.; Serjeant, S.; Farrah, D.; Michałowski, M. J.; Baes, M.; Marchetti, L.; Cooray, A.; Riechers, D. A. and Amvrosiadis, A. (2018). Modelling high resolution ALMA observations of strongly lensed highly star forming galaxies detected by Herschel. Monthly Notices of the Royal Astronomical Society (Early Access).

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DOI (Digital Object Identifier) Link: https://doi.org/10.1093/mnras/sty513
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Abstract

We have modelled ∼ 0.1 arcsec resolution ALMA imaging of six strong gravitationally lensed galaxies detected by the Herschel Space Observatory. Our modelling recovers mass properties of the lensing galaxies and, by determining magnification factors, intrinsic properties of the lensed sub-millimetre sources. We find that the lensed galaxies all have high ratios of star formation rate to dust mass, consistent with or higher than the mean ratio for high redshift sub-millimetre galaxies and low redshift ultra-luminous infra-red galaxies. Source reconstruction reveals that most galaxies exhibit disturbed morphologies. Both the cleaned image plane data and the directly observed interferometric visibilities have been modelled, enabling comparison of both approaches. In the majority of cases, the recovered lens models are consistent between methods, all six having mass density profiles that are close to isothermal. However, one system with poor signal to noise shows mildly significant differences.

Item Type: Journal Item
Copyright Holders: 2018 The Authors
ISSN: 1365-2966
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 53697
SWORD Depositor: Jisc Publications-Router
Depositing User: Jisc Publications-Router
Date Deposited: 08 Mar 2018 14:32
Last Modified: 02 May 2018 14:39
URI: http://oro.open.ac.uk/id/eprint/53697
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