ALMA OBSERVATIONS OF SPT-DISCOVERED, STRONGLY LENSED, DUSTY, STAR-FORMING GALAXIES
Y. D. HezavehDepartment of Physics, McGill University, 3600 Rue University, Montreal, Quebec H3A 2T8, CanadaD. P. MarroneSteward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USAC. D. FassnachtDepartment of Physics, University of California, One Shields Avenue, Davis, CA 95616, USAJ. S. SpilkerSteward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USAJ. D. VieiraCalifornia Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USAJ. E. AguirreUniversity of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USAK. A. AirdUniversity of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAM. AravenaEuropean Southern Observatory, Karl-Schwarzschild Strasse, D-85748 Garching bei München, GermanyM. L. N. AshbyHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAM. BaylissDepartment of Physics, Harvard University, 17 Oxford Street, Cambridge, MA 02138, USAB. A. BensonEnrico Fermi Institute, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAL. E. BleemDepartment of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAM. BothwellSteward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USAM. BrodwinDepartment of Physics and Astronomy, University of Missouri, 5110 Rockhill Road, Kansas City, MO 64110, USAJ. E. CarlstromArgonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL, USA 60439, USAC. L. ChangArgonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL, USA 60439, USAS. C. ChapmanDepartment of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 3J5 CanadaT. M. CrawfordDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAA. T. CritesDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAC. De BreuckEuropean Southern Observatory, Karl-Schwarzschild Strasse, D-85748 Garching bei München, GermanyT. de HaanDepartment of Physics, McGill University, 3600 Rue University, Montreal, Quebec H3A 2T8, CanadaM. A. DobbsDepartment of Physics, McGill University, 3600 Rue University, Montreal, Quebec H3A 2T8, CanadaE. B. FomalontNational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USAE. M. GeorgeDepartment of Physics, University of California, Berkeley, CA 94720, USAM. D. GladdersDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAA. H. GonzalezDepartment of Astronomy, University of Florida, Gainesville, FL 32611, USAT. R. GreveDepartment of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UKN. W. HalversonDepartment of Astrophysical and Planetary Sciences and Department of Physics, University of Colorado, Boulder, CO 80309, USAF. W. HighDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAG. P. HolderDepartment of Physics, McGill University, 3600 Rue University, Montreal, Quebec H3A 2T8, CanadaW. L. HolzapfelDepartment of Physics, University of California, Berkeley, CA 94720, USAS. HooverEnrico Fermi Institute, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAJ. D. HrubesUniversity of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAK. HusbandInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UKT. R. HunterNational Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USAR. KeislerDepartment of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAA. T. LeeDepartment of Physics, University of California, Berkeley, CA 94720, USAE. M. LeitchDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAM. LuekerCalifornia Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USAD. Luong-VanUniversity of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAM. MalkanDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095-1547, USAV. McIntyreAustralia Telescope National Facility, CSIRO, Epping, NSW 1710, AustraliaJ. J. McMahonDepartment of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI, 48109, USAJ. MehlDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAK. M. MentenMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69 D-53121 Bonn, GermanyS. S. MeyerDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAL. M. MocanuDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAE. J. MurphyObservatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USAT. NatoliDepartment of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAS. PadinCalifornia Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USAT. PlaggeDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAC. L. ReichardtDepartment of Physics, University of California, Berkeley, CA 94720, USAA. RestSpace Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, USAJ. RuelDepartment of Physics, Harvard University, 17 Oxford Street, Cambridge, MA 02138, USAJ. E. RuhlPhysics Department, Center for Education and Research in Cosmology and Astrophysics, Case Western Reserve University, Cleveland, OH 44106, USAK. SharonDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAK. K. SchafferKavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAL. ShawDepartment of Physics, McGill University, 3600 Rue University, Montreal, Quebec H3A 2T8, CanadaE. ShirokoffCalifornia Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USAB. StalderHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAZ. StaniszewskiCalifornia Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USAA. A. StarkHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAK. StoryDepartment of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAK. VanderlindeDepartment of Physics, McGill University, 3600 Rue University, Montreal, Quebec H3A 2T8, CanadaA. WeißMax-Planck-Institut für Radioastronomie, Auf dem Hügel 69 D-53121 Bonn, GermanyN. WelikalaInstitut d'Astrophysique Spatiale, Bâtiment 121, Université Paris-Sud XI & CNRS, F-91405 Orsay Cedex, FranceR. WilliamsonDepartment of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA
2013en
ABI
Аннотация
We present Atacama Large Millimeter/submillimeter Array (ALMA) 860 m imaging of four high-redshift (z = 2.8-5.7) dusty sources that were detected using the South Pole Telescope (SPT) at 1.4 mm and are not seen in existing radio to far-infrared catalogs. At 1. 5 resolution, the ALMA data reveal multiple images of each submillimeter source, separated by 1 -3 , consistent with strong lensing by intervening galaxies visible in near-IR imaging of these sources. We describe a gravitational lens modeling procedure that operates on the measured visibilities and incorporates self-calibration-like antenna phase corrections as part of the model optimization, which we use to interpret the source structure. Lens models indicate that SPT0346-52, located at z = 5.7, is one of the most luminous and intensely star-forming sources in the universe with a lensing corrected FIR luminosity of 3.7 10 13 L and star formation surface density of 4200 M yr -1 kpc -2 . We find magnification factors of 5 to 22, with lens Einstein radii of 1. 1-2. 0 and Einstein enclosed masses of 1.6-7.2 10 11 M . These observations confirm the lensing origin of these objects, allow us to measure their intrinsic sizes and luminosities, and demonstrate the important role that ALMA will play in the interpretation of lensed submillimeter sources.
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