University of Hertfordshire Research Archive

        JavaScript is disabled for your browser. Some features of this site may not work without it.

        Browse

        All of UHRABy Issue DateAuthorsTitlesThis CollectionBy Issue DateAuthorsTitles

        Arkivum Files

        My Downloads
        View Item 
        • UHRA Home
        • University of Hertfordshire
        • Research publications
        • View Item
        • UHRA Home
        • University of Hertfordshire
        • Research publications
        • View Item

        Modeling of the Hermes submillimeter source lensed by a dark matter dominated foreground group of galaxies

        View/Open
        Final Accepted Version (PDF, 1Mb)
        Author
        Gavazzi, R.
        Cooray, A.
        Conley, A.
        Aguirre, J. E.
        Amblard, A.
        Auld, R.
        Beelen, A.
        Blain, A.
        Blundell, R.
        Bock, J.
        Bradford, C. M.
        Bridge, C.
        Brisbin, D.
        Burgarella, D.
        Chanial, P.
        Chapin, E.
        Christopher, N.
        Clements, D. L.
        Cox, P.
        Djorgovski, S. G.
        Dowell, C. D.
        Eales, S.
        Earle, L.
        Ellsworth-Bowers, T. P.
        Farrah, D.
        Franceschini, A.
        Fu, H.
        Glenn, J.
        Solares, E. A. Gonzalez
        Griffin, M.
        Gurwell, M. A.
        Halpern, M.
        Ibar, E.
        Ivison, R. J.
        Jarvis, M.J.
        Kamenetzky, J.
        Kim, S.
        Krips, M.
        Levenson, L.
        Lupu, R.
        Mahabal, A.
        Maloney, P. D.
        Maraston, C.
        Marchetti, L.
        Marsden, G.
        Matsuhara, H.
        Mortier, A. M. J.
        Murphy, E.
        Naylor, B. J.
        Neri, R.
        Nguyen, H. T.
        Oliver, S. J.
        Omont, A.
        Page, M. J.
        Papageorgiou, A.
        Pearson, C. P.
        Perez-Fournon, I.
        Pohlen, M.
        Rangwala, N.
        Rawlings, J. I.
        Raymond, G.
        Riechers, D.
        Rodighiero, G.
        Roseboom, I. G.
        Rowan-Robinson, M.
        Schulz, B.
        Scott, Douglas
        Scott, K. S.
        Serra, P.
        Seymour, N.
        Shupe, D. L.
        Smith, A. J.
        Symeonidis, M.
        Tugwell, K. E.
        Vaccari, M.
        Valiante, E.
        Valtchanov, I.
        Verma, A.
        Vieira, J. D.
        Vigroux, L.
        Wang, L.
        Wardlow, J.
        Wiebe, D.
        Wright, G.
        Xu, C. K.
        Zeimann, G.
        Zemcov, M.
        Zmuidzinas, J.
        Attention
        2299/6539
        Abstract
        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,R-* = [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,R-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)(<R-Ein) similar to 80%. This fraction reduces to f(dm)(< R-eff,R-G1 similar or equal to 4.5 kpc) similar to 47% within the effective radius of the main deflecting galaxy of stellar mass M-*,M-G1 = [8.5 +/- 1.6] x 10(11) M-circle dot. At this smaller scale the dark matter fraction is consistent with results already found for massive lensing ellipticals at z similar to 0.2 from the Sloan Lens ACS Survey.
        Publication date
        2011-09-10
        Published in
        The Astrophysical Journal
        Published version
        https://doi.org/10.1088/0004-637X/738/2/125
        Other links
        http://hdl.handle.net/2299/6539
        Metadata
        Show full item record

        Related items

        Showing items related by title, author, creator and subject.

        • The H alpha galaxy survey. I. The galaxy sample, H alpha narrow-band observations and star formation parameters for 334 galaxies 

          James, P.A.; Shane, N.S.; Beckman, J.E.; Cardwell, A.; Collins, C.A.; Etherton, J.; de Jong, R.S.; Fathi, K.; Knapen, J.; Peletier, R.F.; Percival, S.M.; Pollacco, D.L.; Seigar, M.S.; Stedman, S. (2004)
          We discuss the selection and observations of a large sample of nearby galaxies, which we are using to quantify the star formation activity in the local Universe. The sample consists of 334 galaxies across all Hubble types ...
        • On the Key Processes that Drive Galaxy Evolution: the Role of Galaxy Mergers, Accretion, Local Environment and Feedback in Shaping the Present-Day Universe 

          Martin, Garreth (2019-07-17)
          The study of galaxy evolution is a fundamental discipline in modern astrophysics, dealing with how and why galaxies of all types evolve over time. The diversity of present-day galaxies is a reflection of the processes ...
        • Radio Galaxy Zoo: discovery of a poor cluster through a giant wide-angle tail radio galaxy 

          Banfield, J. K.; Andernach, H.; Kapinska, A. D.; Rudnick, L.; Hardcastle, M. J.; Cotter, G.; Vaughan, S.; Jones, T. W.; Heywood, I.; Wing, J. D.; Wong, O. I.; Matorny, T.; Terentev, I. A.; Lopez-Sanchez, A. R.; Norris, R. P.; Seymour, N.; Shabala, S. S.; Willett, K. W. (2016-08-11)
          We have discovered a previously unreported poor cluster of galaxies (RGZ-CL J0823.2+0333) through an unusual giant wide-angle tail radio galaxy found in the Radio Galaxy Zoo project. We obtained a spectroscopic redshift ...
        Keep in touch

        © 2019 University of Hertfordshire

        I want to...

        • Apply for a course
        • Download a Prospectus
        • Find a job at the University
        • Make a complaint
        • Contact the Press Office

        Go to...

        • Accommodation booking
        • Your student record
        • Bayfordbury
        • KASPAR
        • UH Arts

        The small print

        • Terms of use
        • Privacy and cookies
        • Criminal Finances Act 2017
        • Modern Slavery Act 2015
        • Sitemap

        Find/Contact us

        • T: +44 (0)1707 284000
        • E: ask@herts.ac.uk
        • Where to find us
        • Parking
        • hr
        • qaa
        • stonewall
        • AMBA
        • ECU Race Charter
        • disability confident
        • AthenaSwan