MODELING OF THE HERMES SUBMILLIMETER SOURCE LENSED BY A DARK MATTER DOMINATED FOREGROUND GROUP OF GALAXIES
| Titre | MODELING OF THE HERMES SUBMILLIMETER SOURCE LENSED BY A DARK MATTER DOMINATED FOREGROUND GROUP OF GALAXIES |
| Type de publication | Journal Article |
| Year of Publication | 2011 |
| Auteurs | Gavazzi, R, Cooray, A, Conley, A, Aguirre, JE, Amblard, A, Auld, R, Beelen, A, Blain, A, Blundell, R, Bock, J, Bradford, CM, Bridge, C, Brisbin, D, Burgarella, D, Chanial, P, Chapin, E, Christopher, N, Clements, DL, Cox, P, Djorgovski, SG, Dowell, CD, Eales, S, Earle, L, Ellsworth-Bowers, TP, Farrah, D, Franceschini, A, Fu, H, Glenn, J, Solares, EAG, Griffin, M, Gurwell, MA, Halpern, M, Ibar, E, Ivison, RJ, Jarvis, M, Kamenetzky, J, Kim, S, Krips, M, Levenson, L, Lupu, R, Mahabal, A, Maloney, PD, Maraston, C, Marchetti, L, Marsden, G, Matsuhara, H, Mortier, AMJ, Murphy, E, Naylor, BJ, Neri, R, Nguyen, HT, Oliver, SJ, Omont, A, Page, MJ, Papageorgiou, A, Pearson, CP, Perez-Fournon, I, Pohlen, M, Rangwala, N, Rawlings, JI, Raymond, G, Riechers, D, Rodighiero, G, Roseboom, IG, Rowan-Robinson, M, Schulz, B, Scott, D, Scott, KS, Serra, P, Seymour, N, Shupe, DL, Smith, AJ, Symeonidis, M, Tugwell, KE, Vaccari, M, Valiante, E, Valtchanov, I, Verma, A, Vieira, JD, Vigroux, L, Wang, L, Wardlow, J, Wiebe, D, Wright, G, Xu, CK, Zeimann, G, Zemcov, M, Zmuidzinas, J |
| Journal | Astrophysical Journal |
| Volume | 738 |
| Date Published | Sep |
| ISBN Number | 0004-637X |
| Numéro d'accès | WOS:000294954200007 |
| Résumé | We present the results of a gravitational lensing analysis of the bright z(s) = 2.957 submillimeter galaxy (SMG) HERMES found in the 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, allows us to precisely estimate the intrinsic source extension and hence estimate the total lensing magnification to be mu = 10.9 +/- 0.7. We measure the half-light radius R(eff) of the source in the rest-frame near-UV and V bands that characterize the unobscured light coming from stars and find R(eff,*) = [2.0 +/- 0.1] kpc, in good agreement with recent studies on the SMG population. This lens model is also used to estimate the size of the gas distribution (R(eff,gas) = [1.1 +/- 0.5] 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(Ein) = 4 ''.10 +/- 0 ''.02, corresponding to a deflector velocity dispersion of [483 +/- 16] km s(-1). This shows that HERMES is lensed by a galaxy group-size dark matter halo at redshift z(l) similar to 0.6. The projected dark matter contribution largely dominates the mass budget within the Einstein radius with f(dm)( |
