2015ApJ...808L...4A

Query : 2015ApJ...808L...4A

2015ApJ...808L...4A - Astrophys. J., 808, L4 (2015/July-3)

The 2014 ALMA long baseline campaign: observations of the strongly lensed submillimeter galaxy HATLAS J090311.6+003906 at z = 3.042.

ALMA PARTNERSHIP, VLAHAKIS C., HUNTER T.R., HODGE J.A., PEREZ L.M., ANDREANI P., BROGAN C.L., COX P., MARTIN S., ZWAAN M., MATSUSHITA S., DENT W.R.F., IMPELLIZZERI C.M.V., FOMALONT E.B., ASAKI Y., BARKATS D., HILLS R.E., HIROTA A., KNEISSL R., LIUZZO E., LUCAS R., MARCELINO N., NAKANISHI K., PHILLIPS N., RICHARDS A.M.S., TOLEDO I., ALADRO R., BROGUIERE D., CORTES J.R., CORTES P.C., ESPADA D., GALARZA F., GARCIA-APPADOO D., GUZMAN-RAMIREZ L., HALES A.S., HUMPHREYS E.M., JUNG T., KAMENO S., LAING R.A., LEON S., MARCONI G., MIGNANO A., NIKOLIC B., NYMAN L.-A., RADISZCZ M., REMIJAN A., RODON J.A., SAWADA T., TAKAHASHI S., TILANUS R.P.J., VILA VILARO B., WATSON L.C., WIKLIND T., AO Y., DI FRANCESCO J., HATSUKADE B., HATZIMINAOGLOU E., MANGUM J., MATSUDA Y., VAN KAMPEN E., WOOTTEN A., DE GREGORIO-MONSALVO I., DUMAS G., FRANCKE H., GALLARDO J., GARCIA J., GONZALEZ S., HILL T., IONO D., KAMINSKI T., KARIM A., KRIPS M., KURONO Y., LONSDALE C., LOPEZ C., MORALES F., PLARRE K., VIDELA L., VILLARD E., HIBBARD J.E. and TATEMATSU K.

Abstract (from CDS):

We present initial results of very high resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations of the z = 3.042 gravitationally lensed submillimeter galaxy HATLAS J090311.6+003906 (SDP.81). These observations were carried out using a very extended configuration as part of Science Verification for the 2014 ALMA Long Baseline Campaign, with baselines of up to ∼15 km. We present continuum imaging at 151, 236, and 290 GHz at unprecedented angular resolutions as fine as 23 mas, corresponding to an unmagnified spatial scale of ∼180 pc at z = 3.042. The ALMA images clearly show two main gravitational arc components of an Einstein ring, with emission tracing a radius of ∼1". 5. We also present imaging of CO J = 10 - 9, J = 8 - 7, and J = 5 - 4 and) line emission. The CO emission, at an angular resolution of ∼170 mas, is found to broadly trace the gravitational arc structures but with differing morphologies between the CO transitions and compared to the dust continuum. Our detection of line emission, using only the shortest baselines, provides the most resolved detection to date of thermal emission in an extragalactic source. The ALMA continuum and spectral line fluxes are consistent with previous Plateau de Bure Interferometer and Submillimeter Array observations despite the impressive increase in angular resolution. Finally, we detect weak unresolved continuum emission from a position that is spatially coincident with the center of the lens, with a spectral index that is consistent with emission from the core of the foreground lensing galaxy.

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Journal keyword(s): galaxies: high-redshift - galaxies: individual: HATLAS J090311.6+003906 - gravitational lensing: strong - submillimeter: galaxies - techniques: high angular resolution - techniques: interferometric

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 QSO B0748+126 QSO 07 50 52.04573865 +12 31 04.8282079   17.67 17.28 17.16   ~ 335 1
2 QSO B0823+033 BLL 08 25 50.33835759 +03 09 24.5199749   17.81 17.23 16.91   ~ 330 1
3 QSO J0854+2006 BLL 08 54 48.8749846272 +20 06 30.639583620   15.91 15.43 15.56   ~ 2344 1
4 NAME SDP 17b G 09 03 02.9 -01 41 27           ~ 17 0
5 SDP 81 LeG 09 03 11.574 +00 39 06.55           ~ 98 0
6 ICRF J090910.0+012135 Sy1 09 09 10.09159883 +01 21 35.6176206   17.63 17.29 17.04   ~ 428 2
7 ICRF J105829.6+013358 Sy1 10 58 29.60520810 +01 33 58.8237454   18.74 18.28 16.68   ~ 780 2
8 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1990 3
9 QSO J1415+1129 QSO 14 15 46.25 +11 29 43.4   17.63 17.23     ~ 651 0
10 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2963 4

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