Modeling of the HERMES J105751.1+573027 submillimeter source lensed by a dark matter dominated foreground group of galaxies
Creators: name: Gavazzi, R.
name: Cooray, A.
name: Conley, A.
name: Aguirre, J. E.
name: Amblard, A.
name: Auld, R.
name: Beelen, A.
name: Blain, A.
name: Blundell, R.
name: Bock, J.
name: Bradford, C. M.
name: Bridge, C.
name: Brisbin, D.
name: Burgarella, D.
name: Chanial, P.
name: Chapin, E.
name: Christopher, N.
name: Clements, D. L.
name: Cox, P.
name: Djorgovski, S. G.
name: Dowell, C. D.
name: Eales, S.
name: Earle, L.
name: Ellsworth-Bowers, T. P.
name: Farrah, D.
name: Franceschini, A.
name: Fu, H.
name: Glenn, J.
name: Solares, E. A. González
name: Griffin, M.
name: Gurwell, M. A.
name: Halpern, M.
name: Ibar, E.
name: Ivison, R. J.
name: Jarvis, M.
name: Kamenetzky, J.
name: Kim, S.
name: Krips, M.
name: Levenson, L.
name: Lupu, R.
name: Mahabal, A.
name: Maloney, P. D.
name: Maraston, C.
name: Marchetti, L.
name: Marsden, G.
name: Matsuhara, H.
name: Mortier, A. M. J.
name: Murphy, E.
name: Naylor, B. J.
name: Neri, R.
name: Nguyen, H. T.
name: Oliver, S. J.
name: Omont, A.
name: Page, M. J.
name: Papageorgiou, A.
name: Pearson, C. P.
name: Pérez-Fournon, I.
name: Pohlen, M.
name: Rangwala, N.
name: Rawlings, J. I.
name: Raymond, G.
name: Riechers, D.
name: Rodighiero, G.
name: Roseboom, I. G.
name: Rowan-Robinson, M.
name: Schulz, B.
name: Scott, Douglas
name: Scott, K. S.
name: Serra, P.
name: Seymour, N.
name: Shupe, D. L.
name: Smith, A. J.
name: Symeonidis, M.
name: Tugwell, K. E.
name: Vaccari, M.
name: Valiante, E.
name: Valtchanov, I.
name: Verma, A.
name: Vieira, J. D.
name: Vigroux, L.
name: Wang, L.
name: Wardlow, J.
name: Wiebe, D.
name: Wright, G.
name: Xu, C. K.
name: Zeimann, G.
name: Zemcov, M.
name: Zmuidzinas, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present the results of a gravitational lensing analysis of the bright $\zs=2.957$ sub-millimeter galaxy (SMG), HERMES J105751.1+573027 found in {\it Herschel}/SPIRE Science Demonstration Phase data from the Herschel Multi-tiered Extragalactic Survey (HerMES) project. The high resolution imaging available in optical and Near-IR channels, along with CO emission obtained with the Plateau de Bure Interferometer, allow us to precisely estimate the intrinsic source extension and hence estimate the total lensing magnification to be $μ=10.9\pm 0.7$. We measure the half-light radius $R_{\rm eff}$ of the source in the rest-frame Near-UV and $V$ bands that characterize the unobscured light coming from stars and find $R_{\rm eff,*}= [2.0 \pm 0.1]$ kpc, in good agreement with recent studies on the Submillimeter Galaxy population. This lens model is also used to estimate the size of the gas distribution ($R_{\rm eff,gas}= [1.1\pm0.5]$) kpc by mapping back in the source plane the CO (J=5-4) transition line emission. The lens modeling yields a relatively large Einstein radius $R_{\rm Ein}= 4\farcs10 \pm 0\farcs02$, corresponding to a deflector velocity dispersion of [$483\pm 16] \,\kms$. This shows that HERMES J105751.1+573027 is lensed by a {\it galaxy group-size} dark matter halo at redshift $\zl\sim 0.6$. The projected dark matter contribution largely dominates the mass budget within the Einstein radius with $f_{\rm dm}(
description: Submitted to ApJ