Characterization of Herschel-selected strong lens candidates through HST and sub-mm/mm observations
Journal article, 2024

We have carried out Hubble Space Telescope (HST) snapshot observations at 1.1 μm of 281 candidate strongly lensed galaxies identified in the wide-area extragalactic surveys conducted with the Herschel Space Observatory. Our candidates comprise systems with flux densities at 500 μm, S500 ≥ 80 mJy. We model and subtract the surface brightness distribution for 130 systems, where we identify a candidate for the foreground lens candidate. After combining visual inspection, archival high-resolution observations, and lens subtraction, we divide the systems into different classes according to their lensing likelihood. We confirm 65 systems to be lensed. Of these, 30 are new discoveries. We successfully perform lens modelling and source reconstruction on 23 systems, where the foreground lenses are isolated galaxies and the background sources are detected in the HST images. All the systems are successfully modelled as a singular isothermal ellipsoid. The Einstein radii of the lenses and the magnifications of the background sources are consistent with previous studies. However, the background source circularized radii (between 0.34 and 1.30 kpc) are ∼3 times smaller than the ones measured in the sub-millimetre/millimetre for a similarly selected and partially overlapping sample. We compare our lenses with those in the Sloan Lens Advanced Camera for Surveys (ACS) Survey confirming that our lens-independent selection is more effective at picking up fainter and diffuse galaxies and group lenses. This sample represents the first step towards characterizing the near-infrared properties and stellar masses of the gravitationally lensed dusty star-forming galaxies.

gravitational lensing: strong

galaxies: photometry

galaxies: high-redshift

Author

E. Borsato

University of Padua

L. Marchetti

Istituto di Radioastronomia

University of Cape Town

University of the Western Cape

M. Negrello

Cardiff University

E. M. Corsini

Istituto nazionale di astrofisica (INAF)

University of Padua

D. Wake

The University of North Carolina System

A. Amvrosiadis

Durham University

A. J. Baker

University of the Western Cape

Rutgers University

Tom J.L.C. Bakx

National Astronomical Observatory of Japan

Nagoya University

A. Beelen

Institut d'Astrophysique Spatiale

S. Berta

Institut de Radioastronomie Millimétrique (IRAM)

A. Beyer

University of Cologne

D. L. Clements

Imperial College London

A. Cooray

University of California at Irvine (UCI)

P. Cox

Institut d 'Astrophysique de Paris

H. Dannerbauer

University of La Laguna

Instituto de Astrofísica de Canarias

G. De Zotti

Istituto nazionale di astrofisica (INAF)

S. Dye

University of Nottingham

S. Eales

Cardiff University

A. F.M. Enia

Istituto nazionale di astrofisica (INAF)

University of Bologna

D. Farrah

University of Hawaii

J. González-Nuevo

Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA)

University of Oviedo

David H. Hughes

National Institute of Astrophysics, Optics and Electronics

D. Ismail

Centre National d'Etudes Spatiales (CNES)

S. Jin

Technical University of Denmark (DTU)

Cosmic Dawn Center (DAWN)

A. Lapi

Scuola Internazionale Superiore di Studi Avanzati

M. Lehnert

Université de Lyon

R. Neri

Institut de Radioastronomie Millimétrique (IRAM)

I. Perez-Fournon

Instituto de Astrofísica de Canarias

University of La Laguna

D. A. Riechers

University of Cologne

G. Rodighiero

Istituto nazionale di astrofisica (INAF)

University of Padua

D. Scott

University of British Columbia (UBC)

S. Serjeant

Open University

F. Stanley

Institut de Radioastronomie Millimétrique (IRAM)

S. Urquhart

Open University

P. van der Werf

Leiden University

M. Vaccari

Istituto di Radioastronomia

University of the Western Cape

L. Wang

University of Groningen

Netherlands Institute for Space Research (SRON)

Chentao Yang

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

A. J. Young

Rutgers University

Monthly Notices of the Royal Astronomical Society

00358711 (ISSN) 13652966 (eISSN)

Vol. 528 4 6222-6279

Subject Categories (SSIF 2011)

Astronomy, Astrophysics and Cosmology

DOI

10.1093/mnras/stad3381

More information

Latest update

4/4/2025 7