2018MNRAS.479.4345A

Query : 2018MNRAS.479.4345A

2018MNRAS.479.4345A - Mon. Not. R. Astron. Soc., 479, 4345-4354 (2018/October-0)

DES meets Gaia: discovery of strongly lensed quasars from a multiplet search.

AGNELLO A., LIN H., KUROPATKIN N., BUCKLEY-GEER E., ANGUITA T., SCHECHTER P.L., MORISHITA T., MOTTA V., ROJAS K., TREU T., AMARA A., AUGER M.W., COURBIN F., FASSNACHT C.D., FRIEMAN J., MORE A., MARSHALL P.J., McMAHON R.G., MEYLAN G., SUYU S.H., GLAZEBROOK K., MORGAN N., NORD B., ABBOTT T.M.C., ABDALLA F.B., ANNIS J., BECHTOL K., BENOIT-LEVY A., BERTIN E., BERNSTEIN R.A., BROOKS D., BURKE D.L., CARNERO ROSELL A., CARRETERO J., CUNHA C.E., D'ANDREA C.B., DA COSTA L.N., DESAI S., DRLICA-WAGNER A., EIFLER T.F., FLAUGHER B., GARCIA-BELLIDO J., GAZTANAGA E., GERDES D.W., GRUEN D., GRUENDL R.A., GSCHWEND J., GUTIERREZ G., HONSCHEID K., JAMES D.J., KUEHN K., LAHAV O., LIMA M., MAIA M.A.G., MARCH M., MENANTEAU F., MIQUEL R., OGANDO R.L.C., PLAZAS A.A., SANCHEZ E., SCARPINE V., SCHINDLER R., SCHUBNELL M., SEVILLA-NOARBE I., SMITH M., SOARES-SANTOS M., SOBREIRA F., SUCHYTA E., SWANSON M.E.C., TARLE G., TUCKER D. and WECHSLER R.

Abstract (from CDS):

We report the discovery, spectroscopic confirmation, and first lens models of the first, strongly lensed quasars from a combined search in WISE and Gaia-DR1 over the DES footprint. Their Einstein radii span a range between ≃2.0 arcsec and ≃0.4 arcsec. Two of these (WGD2038-4008, RA = 20:38:02.65, Dec. = -40:08:14.64; WGD2021-4115, RA = 20:21:39.45, Dec. = -41:15:57.11) also have confirmed deflector redshifts. The four-image lens WGD2038-4008, with source and deflector redshifts s = 0.777 ± 0.001 and zl = 0.230 ± 0.002, respectively, has a deflector with radius Reff ≃ 3.4 arcsec, stellar mass log(M*/M☉)=11.64+0.20–0.43, and extended isophotal shape variation. Simple lens models yield Einstein radii RE = (1.30 ± 0.04) arcsec, axis ratio q = 0.75 ± 0.1 (compatible with that of the starlight) and considerable shear-ellipticity degeneracies. The two-image lens WGD2021-4115 has zs = 1.390 ± 0.001 and zl = 0.335 ± 0.002, and Einstein radius RE = (1.1 ± 0.1) arcsec, but higher-resolution imaging is needed to accurately separate the deflector and faint quasar image. Analogous lens model degeneracies hold for the other six lenses (J0146-1133, J0150-4041, J0235-2433, J0245-0556, J0259-2338, and J0508-2748) shown in this paper.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gravitational lensing: strong - methods: statistical - techniques: image processing - surveys

Nomenclature: Table 1: [ALK2018] WGD JHHMM+DDMM N=20, [ALK2018] WGD JHHMM+DDMM source N=9. Table 2: [ALK2018] WGD JHHMM+DDMM AN N=26.

Simbad objects: 33

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Number of rows : 33
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 DES J012006.38-435440.8 LS? 01 20 06.378 -43 54 40.61           ~ 3 0
2 [ALK2018] WGD J0146-1133 source QSO 01 46 32.877 -11 33 38.96           ~ 1 0
3 [ALK2018] WGD J0146-1133 LS? 01 46 32.877 -11 33 38.96           ~ 5 0
4 QSO J0150-4041B LeQ 01 50 56.8314792768 -40 41 44.106425340           ~ 2 0
5 [ALK2018] WGD J0150-4041 LS? 01 50 56.861 -40 41 44.04           ~ 2 0
6 [ALK2018] WGD J0210-4612 LS? 02 10 54.770 -46 12 51.75           ~ 1 0
7 [ALK2018] WGD J0235-2433 LS? 02 35 27.422 -24 33 13.24           ~ 5 0
8 [ALK2018] WGD J0235-2433 source QSO 02 35 27.422 -24 33 13.24           ~ 1 0
9 QSO J0245-0556 QSO 02 45 25.5605523310 -05 57 00.759637204           ~ 2 0
10 [ALK2018] WGD J0245-0556 gLS 02 45 25.561 -05 57 00.52           ~ 5 0
11 [ALK2018] WGD J0259-2338 source QSO 02 59 33.516 -23 38 01.79           ~ 1 0
12 [ALK2018] WGD J0259-2338 gLS 02 59 33.516 -23 38 01.79           ~ 5 0
13 [ALK2018] WGD J0317-5604 LS? 03 17 42.976 -56 04 54.85           ~ 1 0
14 [ALK2018] WGD J0317-5604 source QSO 03 17 42.976 -56 04 54.85           ~ 1 0
15 [ALK2018] WGD J0334-4535 LS? 03 34 41.313 -45 03 52.52           ~ 1 0
16 [ALK2018] WGD J0354-3333 LS? 03 54 57.3126859560 -33 33 38.588222916           ~ 1 0
17 [ALK2018] WGD J0448-2719 LS? 04 48 43.2160645056 -27 19 31.906909956           ~ 1 0
18 [ALK2018] WGD J0508-2748 source QSO 05 08 03.196 -27 48 19.01           ~ 2 0
19 [ALK2018] WGD J0508-2748 LS? 05 08 03.196 -27 48 19.01           ~ 2 0
20 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
21 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
22 [ALK2018] WGD J0630-3837 LS? 06 03 08.0035065984 -38 37 43.129080984           ~ 1 0
23 [ALK2018] WGD J2021-4115 source QSO 20 21 39.455 -41 15 57.11           ~ 2 0
24 [ALK2018] WGD J2021-4115 LS? 20 21 39.455 -41 15 57.11           ~ 1 0
25 [VV2006] J202610.4-453627 QSO 20 26 10.45 -45 36 27.1           ~ 54 1
26 [VV2006] J203342.1-472343 QSO 20 33 42.12 -47 23 43.9           ~ 135 1
27 [ALK2018] WGD J2038-4008 gLS 20 38 02.707 -40 08 13.59           ~ 23 0
28 [ALK2018] WGD J2038-4008 source QSO 20 38 02.707 -40 08 13.59           ~ 6 0
29 DES J204726.90-480147.9 LS? 20 47 26.8970352888 -48 01 48.032481360   18.4   18.1   ~ 3 0
30 [ALK2018] WGD J2144-4228 LS? 21 04 44.158 -42 28 53.43           ~ 1 0
31 [ALK2018] WGD J2139-4331 LS? 21 39 57.142 -43 31 01.87           ~ 1 0
32 DES J214148.85-462945.7 LS? 21 41 48.848 -46 29 46.03           ~ 2 0
33 [ALK2018] WGD J2332-4934 LS? 23 32 10.312 -49 34 06.68           ~ 1 0

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