2013ApJ...767..132H

Query : 2013ApJ...767..132H

2013ApJ...767..132H - Astrophys. J., 767, 132 (2013/April-3)

ALMA observations of SPT-discovered, strongly lensed, dusty, star-forming galaxies.

HEZAVEH Y.D., MARRONE D.P., FASSNACHT C.D., SPILKER J.S., VIEIRA J.D., AGUIRRE J.E., AIRD K.A., ARAVENA M., ASHBY M.L.N., BAYLISS M., BENSON B.A., BLEEM L.E., BOTHWELL M., BRODWIN M., CARLSTROM J.E., CHANG C.L., CHAPMAN S.C., CRAWFORD T.M., CRITES A.T., DE BREUCK C., DE HAAN T., DOBBS M.A., FOMALONT E.B., GEORGE E.M., GLADDERS M.D., GONZALEZ A.H., GREVE T.R., HALVERSON N.W., HIGH F.W., HOLDER G.P., HOLZAPFEL W.L., HOOVER S., HRUBES J.D., HUSBAND K., HUNTER T.R., KEISLER R., LEE A.T., LEITCH E.M., LUEKER M., LUONG-VAN D., MALKAN M., McINTYRE V., McMAHON J.J., MEHL J., MENTEN K.M., MEYER S.S., MOCANU L.M., MURPHY E.J., NATOLI T., PADIN S., PLAGGE T., REICHARDT C.L., REST A., RUEL J., RUHL J.E., SHARON K., SCHAFFER K.K., SHAW L., SHIROKOFF E., STALDER B., STANISZEWSKI Z., STARK A.A., STORY K., VANDERLINDE K., WEISS A., WELIKALA N. and WILLIAMSON R.

Abstract (from CDS):

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 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 3.7x1013 L☉ and star formation surface density of 4200 M☉/yr/kpc2. We find magnification factors of 5 to 22, with lens Einstein radii of 1.''1-2.''0 and Einstein enclosed masses of 1.6-7.2x1011 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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Journal keyword(s): galaxies: high-redshift - galaxies: starburst - gravitational lensing: strong - techniques: interferometric

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACT-S J034640-520505 rG 03 46 41.190 -52 05 05.50           ~ 49 0
2 QSO J0403-3605 Bla 04 03 53.74990003 -36 05 01.9131880   17.04 17.17 16.67   ~ 313 1
3 SPT-S J041839-4751.8 rG 04 18 39.270 -47 51 50.10           ~ 59 0
4 ACT-S J052903-543650 rG 05 29 03.370 -54 36 40.30           ~ 21 0
5 ACT-S J053817-503058 rG 05 38 16.830 -50 30 52.00           ~ 33 1
6 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 245 0

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