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The Herschel-ATLAS: a sample of 500 mu m- selected lensed galaxies over 600 deg(2)

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Title: The Herschel-ATLAS: a sample of 500 mu m- selected lensed galaxies over 600 deg(2)
Authors: Negrello, M
Amber, S
Amvrosiadis, A
Cai, Z-Y
Lapi, A
Gonzalez-Nuevo, J
De Zotti, G
Furlanetto, C
Maddox, SJ
Allen, M
Bakx, T
Bussmann, RS
Cooray, A
Covone, G
Danese, L
Dannerbauer, H
Fu, H
Greenslade, J
Gurwell, M
Hopwood, R
Koopmans, LVE
Napolitano, N
Nayyeri, H
Omont, A
Petrillo, CE
Riechers, DA
Serjeant, S
Tortora, C
Valiante, E
Kleijn, GV
Vernardos, G
Wardlow, JL
Baes, M
Baker, AJ
Bourne, N
Clements, D
Crawford, SM
Dye, S
Dunne, L
Eales, S
Ivison, RJ
Marchetti, L
Michalowski, MJ
Smith, MWL
Vaccari, M
Van der Werf, P
Item Type: Journal Article
Abstract: We present a sample of 80 candidate strongly lensed galaxies with flux density above 100 mJy at 500 μm extracted from the Herschel Astrophysical Terahertz Large Area Survey, over an area of 600 deg2. Available imaging and spectroscopic data allow us to confirm the strong lensing in 20 cases and to reject it in one case. For other eight objects, the lensing scenario is strongly supported by the presence of two sources along the same line of sight with distinct photometric redshifts. The remaining objects await more follow-up observations to confirm their nature. The lenses and the background sources have median redshifts zL = 0.6 and zS = 2.5, respectively, and are observed out to zL = 1.2 and zS = 4.2. We measure the number counts of candidate lensed galaxies at 500 μm and compare them with theoretical predictions, finding a good agreement for a maximum magnification of the background sources in the range 10–20. These values are consistent with the magnification factors derived from the lens modelling of individual systems. The catalogue presented here provides sub-mm bright targets for follow-up observations aimed at exploiting gravitational lensing, to study with unprecedented details the morphological and dynamical properties of dusty star-forming regions in z ≳ 1.5 galaxies.
Issue Date: 1-Mar-2017
Date of Acceptance: 7-Nov-2016
URI: http://hdl.handle.net/10044/1/60565
DOI: https://dx.doi.org/10.1093/mnras/stw2911
ISSN: 0035-8711
Publisher: Oxford University Press (OUP)
Start Page: 3558
End Page: 3580
Journal / Book Title: Monthly Notices of the Royal Astronomical Society
Volume: 465
Issue: 3
Copyright Statement: © 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
gravitational lensing: strong
galaxies: evolution
galaxies: high
redshift submillimetre
galaxies
DARK-MATTER SUBSTRUCTURE
STAR-FORMING GALAXIES
RESOLUTION ALMA OBSERVATIONS
LUMINOUS INFRARED GALAXIES
SOUTH-POLE TELESCOPE
DEEP FIELD-SOUTH
SUBMILLIMETER GALAXIES
DATA RELEASE
REDSHIFT DISTRIBUTION
GRAVITATIONAL LENSES
0201 Astronomical And Space Sciences
Publication Status: Published
Online Publication Date: 2016-11-20
Appears in Collections:Physics
Astrophysics



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