LENS MODELS OF HERSCHEL-SELECTED GALAXIES FROM HIGH-RESOLUTION NEAR-IR OBSERVATIONS

J. A Calanog; A Cooray; B Ma; C. M Casey; Hai Fu; J Wardlow; S Amber; A. J Baker; M Baes; J Bock; N Bourne; S Dye; R. S Bussmann; S. C Chapman; D. L Clements; A Conley; H Dannerbauer; G De Zotti; L Dunne; S Eales

doi:10.1088/0004-637X/797/2/138

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LENS MODELS OF HERSCHEL-SELECTED GALAXIES FROM HIGH-RESOLUTION NEAR-IR OBSERVATIONS

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LENS MODELS OF HERSCHEL-SELECTED GALAXIES FROM HIGH-RESOLUTION NEAR-IR OBSERVATIONS

J. A Calanog, A Cooray, B Ma, C. M Casey, Hai Fu, J Wardlow, S Amber, A. J Baker, M Baes, J Bock, …

The Astrophysical journal, Vol.797(2), pp.1-26

12/20/2014

DOI: 10.1088/0004-637X/797/2/138

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Abstract

We present Keck-Adaptive Optics and Hubble Space Telescope high resolution near-infrared (IR) imaging for 500 μm bright candidate lensing systems identified by the Herschel Multi-tiered Extragalactic Survey and Herschel Astrophysical Terahertz Large Area Survey. Out of 87 candidates with near-IR imaging, 15 (∼17%) display clear near-IR lensing morphologies. We present near-IR lens models to reconstruct and recover basic rest-frame optical morphological properties of the background galaxies from 12 new systems. Sources with the largest near-IR magnification factors also tend to be the most compact, consistent with the size bias predicted from simulations and previous lensing models for submillimeter galaxies (SMGs). For four new sources that also have high-resolution submillimeter maps, we test for differential lensing between the stellar and dust components and find that the 880 μm magnification factor (μ{sub 880}) is ∼1.5 times higher than the near-IR magnification factor (μ{sub NIR}), on average. We also find that the stellar emission is ∼2 times more extended in size than dust. The rest-frame optical properties of our sample of Herschel-selected lensed SMGs are consistent with those of unlensed SMGs, which suggests that the two populations are similar.

Astrophysics

Optics

Telescopes

ASTROPHYSICS, COSMOLOGY AND ASTRONOMY

COMPUTERIZED SIMULATION

COSMIC DUST

GALAXIES

GRAVITATIONAL LENSES

NEAR INFRARED RADIATION

OPTICAL PROPERTIES

RESOLUTION

SPACE

STARS

Details

Title: Subtitle: LENS MODELS OF HERSCHEL-SELECTED GALAXIES FROM HIGH-RESOLUTION NEAR-IR OBSERVATIONS
Creators: J. A Calanog
A Cooray
B Ma
C. M Casey - University of California, Irvine
Hai Fu - University of Iowa
J Wardlow - University of Copenhagen
S Amber - The Open University
A. J Baker - Rutgers, The State University of New Jersey
M Baes - 1 Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281, B-9000 Gent (Belgium)
J Bock - California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States)
N Bourne
S Dye - University of Nottingham
R. S Bussmann - Cornell University
S. C Chapman - Institute of Astronomy
D. L Clements - Imperial College London
A Conley - University of Colorado Boulder
H Dannerbauer - Laboratoire AIM-Paris-Saclay, CEA/DSM/Irfu-CNRS-Université Paris Diderot, CE-Saclay, pt courrier 131, F-91191 Gif-sur-Yvette (France)
G De Zotti - Osservatorio Astronomico di Padova
L Dunne
S Eales - Cardiff University
Resource Type: Journal article
Publication Details: The Astrophysical journal, Vol.797(2), pp.1-26
DOI: 10.1088/0004-637X/797/2/138
ISSN: 0004-637X
eISSN: 1538-4357
Publisher: Institute of Physics (IOP)
Language: English
Date published: 12/20/2014
Academic Unit: Physics and Astronomy
Record Identifier: 9984199767902771

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