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

J. A. Calanog*, Hai Fu, A. Cooray, J. Wardlow, B. Ma, S. Amber, A. J. Baker, M. Baes, J. Bock, R. S. Bussmann, C. M. Casey, S. C. Chapman, D. L. Clements, A. Conley, H. Dannerbauer, G. De Zotti, S. Dye, S. Eales, D. Farrah, C. FurlanettoA. I. Harris, R. J. Ivison, S. Kim, G. Magdis, H. Messias, M. J. Michallowski, M. Negrello, J. Nightingale, J. M. O'Bryan, S. J. Oliver, D. Riechers, D. Scott, S. Serjeant, J. Simpson, M. Smith, N. Timmons, C. Thacker, E. Valiante, J. D. Vieira, Nathan Bourne, Loretta Dunne, Stephen Maddox

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present Keck-Adaptive Optics and Hubble Space Telescope high resolution near-infrared (IR) imaging for 500 mu m 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 (similar to 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 mu m magnification factor (mu(880)) is similar to 1.5 times higher than the near-IR magnification factor (mu(NIR)), on average. We also find that the stellar emission is similar to 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.

Original languageEnglish
Article number138
Number of pages26
JournalAstrophysical Journal
Volume797
Issue number2
DOIs
Publication statusPublished - 20 Dec 2014

Keywords

  • galaxies: star formation
  • gravitational lensing: strong
  • submillimeter: galaxies
  • DEEP-FIELD-SOUTH
  • STAR-FORMING GALAXIES
  • ULTRALUMINOUS INFRARED GALAXIES
  • LUMINOUS SUBMILLIMETER GALAXIES
  • HIGH-REDSHIFT GALAXIES
  • DIGITAL SKY SURVEY
  • COSMOLOGICAL HYDRODYNAMIC SIMULATIONS
  • 1ST DATA RELEASE
  • SPACE-TELESCOPE
  • ADAPTIVE OPTICS

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