2017MNRAS.472.4038A

Query : 2017MNRAS.472.4038A

2017MNRAS.472.4038A - Mon. Not. R. Astron. Soc., 472, 4038-4050 (2017/December-3)

Models of the strongly lensed quasar DES J0408-5354.

AGNELLO A., LIN H., BUCKLEY-GEER L., TREU T., BONVIN V., COURBIN F., LEMON C., MORISHITA T., AMARA A., AUGER M.W., BIRRER S., CHAN J., COLLETT T., MORE A., FASSNACHT C.D., FRIEMAN J., MARSHALL P.J., McMAHON R.G., MEYLAN G., SUYU S.H., CASTANDER F., FINLEY D., HOWELL A., KOCHANEK C., MAKLER M., MARTINI P., MORGAN N., NORD B., OSTROVSKI F., SCHECHTER P., TUCKER D., WECHSLER R., ABBOTT T.M.C., ABDALLA F.B., ALLAM S., BENOIT-LEVY A., BERTIN E., BROOKS D., BURKE D.L., CARNERO ROSELL A., CARRASCO KIND M., CARRETERO J., CROCCE M., CUNHA C.E., D'ANDREA C.B., DA COSTA L.N., DESAI S., DIETRICH J.P., EIFLER T.F., FLAUGHER B., FOSALBA P., GARCIA-BELLIDO J., GAZTANAGA E., GILL M.S., GOLDSTEIN D.A., GRUEN D., GRUENDL R.A., GSCHWEND J., GUTIERREZ G., HONSCHEID K., JAMES D.J., KUEHN K., KUROPATKIN N., LI T.S., LIMA M., MAIA M.A.G., MARCH M., MARSHALL J.L., MELCHIOR P., MENANTEAU F., MIQUEL R., OGANDO R.L.C., PLAZAS A.A., ROMER A.K., SANCHEZ E., SCHINDLER R., SCHUBNELL M., SEVILLA-NOARBE I., SMITH M., SMITH R.C., SOBREIRA F., SUCHYTA E., SWANSON M.E.C., TARLE G., THOMAS D. and WALKER A.R.

Abstract (from CDS):

We present detailed modelling of the recently discovered, quadruply lensed quasar J0408-5354, with the aim of interpreting its remarkable configuration: besides three quasar images (A,B,D) around the main deflector (G1), a fourth image (C) is significantly reddened and dimmed by a perturber (G2) which is not detected in the Dark Energy Survey imaging data. From lens models incorporating (dust-corrected) flux ratios, we find a perturber Einstein radius 0.04 arcsec <= R_E, G2_ <= 0.2 arcsec and enclosed mass Mp(R_E, G2_) <= 1.0 x 1010 M☉. The main deflector has stellar mass log10(M*/M☉)=11.49+0.46–0.32, a projected mass Mp(R_E, G1_) ≃ 6 x 1011 M☉ within its Einstein radius R_E, G1_ = (1.85 ± 0.15) arcsec and predicted velocity dispersion 267-280 km s–1. Follow-up images from a companion monitoring campaign show additional components, including a candidate second source at a redshift between the quasar and G1. Models with free perturbers, and dust-corrected and delay-corrected flux ratios, are also explored. The predicted time-delays (ΔtAB = (135.0 ± 12.6) d, ΔtBD = (21.0 ± 3.5) d) roughly agree with those measured, but better imaging is required for proper modelling and comparison. We also discuss some lessons learnt from J0408-5354 on lensed quasar finding strategies, due to its chromaticity and morphology.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

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

Nomenclature: Fig. 2, Table 1: [ALB2017] DES J0408-5354 N=1, [ALB2017] DES J0408-5354 AN (Nos A-D, G1-G5). Text: [ALB2017] DES J0408-5354 source N=1.

Simbad objects: 12

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Number of rows : 12
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 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
2 [ALB2017] DES J0408-5354 C LeQ 04 08 21.49 -53 54 00.3           ~ 3 0
3 [ALB2017] DES J0408-5354 G2 G 04 08 21.49 -53 54 00.3           ~ 3 0
4 [ALB2017] DES J0408-5354 B LeQ 04 08 21.49 -53 53 59.2           ~ 5 0
5 [ALB2017] DES J0408-5354 G1 G 04 08 21.70 -53 53 59.6           ~ 6 0
6 [ALB2017] DES J0408-5354 source QSO 04 08 21.70 -53 53 59.6           ~ 7 0
7 [ALB2017] DES J0408-5354 gLS 04 08 21.70 -53 53 59.6           ~ 37 0
8 [ALB2017] DES J0408-5354 D LeQ 04 08 21.71 -53 53 58.1           ~ 5 0
9 [ALB2017] DES J0408-5354 G3 G 04 08 21.79 -53 53 59.4           ~ 2 0
10 [ALB2017] DES J0408-5354 A LeQ 04 08 21.9440821536 -53 54 00.873496512           ~ 5 0
11 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 546 0
12 NVSS J160914+653229 rG 16 09 13.93704 +65 32 27.9024     19.4     ~ 215 0

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