SIMBAD references

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 z_l = 0.230 ± 0.002, respectively, has a deflector with radius R_eff ≃ 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 R_E = (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 z_s = 1.390 ± 0.001 and z_l = 0.335 ± 0.002, and Einstein radius R_E = (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.

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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