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Type: Artigo
Title: Models of the strongly lensed quasar DES J0408-5354
Author: 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.
Rosell, A. C.
Kind, M. C.
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.
Walker, A. R.
Abstract: 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 less than or similar to R-E,R- G2 less than or similar to 0.2 arcsec and enclosed mass M-p(R-E,R- G2) less than or similar to 1.0 x 10(10) M-circle dot. The main deflector has stellar mass log(10)(M-star/M-circle dot) = 11.49(-0.32)(+0.46), a projected mass M-p(R-E,R- G1) approximate to 6 x 10(11) M-circle dot within its Einstein radius R-E,R- 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 (Delta t(AB) = (135.0 +/- 12.6) d, Delta t(BD) = (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.
Subject: Lentes gravitacionais
Processamento de imagens
Gravitational lenses
Image processing
Country: Reino Unido
Editor: Oxford University Press
Rights: aberto
Identifier DOI: 10.1093/mnras/stx2242
Date Issue: 2017
Appears in Collections:IFGW - Artigos e Outros Documentos

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