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

Maresca, Jacob; Dye, Simon; Amvrosiadis, Aristeidis; Bendo, George; Cooray, Asantha; De Zotti, Gianfranco; Dunne, Loretta; Eales, Stephen; Furlanetto, Cristina; González-Nuevo, Joaquin; Greener, Michael; Ivison, Robert; Lapi, Andrea; Negrello, Mattia; Riechers, Dominik; Serjeant, Stephen; Tergolina, Mônica; Wardlow, Julie

Abstract

We present modelling of ∼0.1 arcsec resolution Atacama Large Millimetre/submillimetre Array imaging of seven strong gravitationally lensed galaxies detected by the Herschel Space Observatory. Four of these systems are galaxy-galaxy strong lenses, with the remaining three being group-scale lenses. Through careful modelling of visibilities, we infer the mass profiles of the lensing galaxies and by determining the magnification factors, we investigate the intrinsic properties and morphologies of the lensed submillimetre sources. We find that these submillimetre sources all have ratios of star formation rate to dust mass that are consistent with, or in excess of, the mean ratio for high-redshift submillimetre galaxies and low redshift ultra-luminous infrared galaxies. Reconstructions of the background sources reveal that the majority of our sample display disturbed morphologies. The majority of our lens models have mass density slopes close to isothermal, but some systems show significant differences.

Citation

Maresca, J., Dye, S., Amvrosiadis, A., Bendo, G., Cooray, A., De Zotti, G., …Wardlow, J. (2022). Modelling high-resolution ALMA observations of strongly lensed dusty star-forming galaxies detected by Herschel. Monthly Notices of the Royal Astronomical Society, 512(2), 2426–2438. https://doi.org/10.1093/mnras/stac585

• Journal Article Type: Article
• Acceptance Date: Mar 1, 2022
• Online Publication Date: Mar 4, 2022
• Publication Date: 2022-05
• Deposit Date: Mar 7, 2022
• Publicly Available Date: Mar 18, 2022
• 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: 512
• Issue: 2
• Pages: 2426–2438
• DOI: https://doi.org/10.1093/mnras/stac585
• Keywords: Space and Planetary Science; Astronomy and Astrophysics
• Public URL: https://nottingham-repository.worktribe.com/output/7545980
• Publisher URL: https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stac585/6542443
• Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2022 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.