1. Lens Models of Herschel-Selected Galaxies From High-Resolution Near-IR Observations
- Author
-
Calanog, J. A., Fu, Hai, Cooray, A., Wardlow, J., Ma, B., Amber, S., Baes, M., Bock, J., Bourne, N., Bussmann, R. S., Casey, C. M., Chapman, S. C., Clements, D. L., Conley, A., Dannerbauer, H., DeZotti, G., Dunne, L., Dye, S., Eales, S., Farrah, D., Furlanetto, C., Harris, A. I., Ivison, R. J., Maddox, S. J., Magdis, G., Michalowski, M. J., Negrello, M., Nightingale, J., O'Bryan, J. M., Oliver, S. J., Riechers, D., Scott, D., Serjeant, S., Simpson, J., Smith, M., Timmons, N., Thacker, C., Valiante, E., Vieira, J. D., Calanog, J. A., Fu, Hai, Cooray, A., Wardlow, J., Ma, B., Amber, S., Baes, M., Bock, J., Bourne, N., Bussmann, R. S., Casey, C. M., Chapman, S. C., Clements, D. L., Conley, A., Dannerbauer, H., DeZotti, G., Dunne, L., Dye, S., Eales, S., Farrah, D., Furlanetto, C., Harris, A. I., Ivison, R. J., Maddox, S. J., Magdis, G., Michalowski, M. J., Negrello, M., Nightingale, J., O'Bryan, J. M., Oliver, S. J., Riechers, D., Scott, D., Serjeant, S., Simpson, J., Smith, M., Timmons, N., Thacker, C., Valiante, E., and Vieira, J. D.
- Abstract
We present Keck-Adaptive Optics and Hubble Space Telescope high resolution near-infrared (IR) imaging for 500 um-bright candidate lensing systems identified by the Herschel Multi-tiered Extra-galactic Survey (HerMES) and Herschel Astrophysical Terahertz Survey (H-ATLAS). 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 pre- vious lensing models for sub-millimeter galaxies. For four new sources that also have high-resolution sub-mm maps, we test for differential lensing between the stellar and dust components and find that the 880 um magnification factor (u_880) is ~1.5 times higher than the near-IR magnification factor (u_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., Comment: 27 pages, 13 figures, 7 tables, ApJ accepted
- Published
- 2014
- Full Text
- View/download PDF