Journal article
Alma observations of spt-discovered, strongly lensed, dusty, star-forming galaxies
YD Hezaveh, DP Marrone, CD Fassnacht, JS Spilker, JD Vieira, JE Aguirre, KA Aird, M Aravena, MLN Ashby, M Bayliss, BA Benson, LE Bleem, M Bothwell, M Brodwin, JE Carlstrom, CL Chang, SC Chapman, TM Crawford, AT Crites, C De Breuck Show all
Astrophysical Journal | Published : 2013
Abstract
We present Atacama Large Millimeter/submillimeter Array (ALMA) 860 μm 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 struc..
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Awarded by Science and Technology Facilities Council
Funding Acknowledgements
The SPT is supported by the National Science Foundation through grant ANT-0638937, with partial support through PHY-1125897, the Kavli Foundation, and the Gordon and Betty Moore Foundation. This paper makes use of the following ALMA data: ADS/JAO. ALMA #2011.0.00957. S and #2011.0.00958. S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Partial support for this work was provided by NASA through grant HST-GO-12659 from the Space Telescope Science Institute and an award for Herschel analysis issued by JPL/Caltech for OT2_jvieira_5. Work at McGill is supported by NSERC, the CRC program, and CIfAR. Y.D.H. acknowledges the support of FQRNT through International Training Program and Doctoral Research scholarships. T.R.G. acknowledges support from the Science and Technologies Facilities Council.