P. Bergamini, P. Rosati, E. Vanzella, G. Caminha, C. Grillo, A. Mercurio, M. Meneghetti, G. Angora, F. Calura, M. Nonino, P. Tozzi
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The high signal-to-noise spectra of the MDLF enables the measurement of the internal velocity dispersion of 64 cluster galaxies, down to m(F160W)=22. This allows us to independently estimate the contribution of the subhalo mass component of the lens model from the measured Faber-Jackson scaling relation. Our best reference model, which represents a significant step forward compared to our previous analyses, is selected from a comparative study of different mass parametrizations. The r.m.s. displacement between the observed and model-predicted image positions is only 0.40\", 33% smaller than in all previous models. The mass model appears to be particularly well constrained in the MDLF region. We characterize the robustness of the magnification map at varying distances from the model critical lines and the total projected mass profile of the cluster.","PeriodicalId":8452,"journal":{"name":"arXiv: Astrophysics of Galaxies","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"9","resultStr":"{\"title\":\"A new high-precision strong lensing model of the galaxy cluster MACS J0416.1−2403\",\"authors\":\"P. Bergamini, P. Rosati, E. Vanzella, G. Caminha, C. Grillo, A. Mercurio, M. Meneghetti, G. Angora, F. Calura, M. Nonino, P. Tozzi\",\"doi\":\"10.1051/0004-6361/202039564\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We present a new high-precision parametric strong lensing model of the galaxy cluster MACS J0416.1-2403, at z=0.396, which takes advantage of the MUSE Deep Lensed Field (MDLF, Vanzella et al. 2020b), with 17.1h integration in the North-East region of the cluster, and Hubble Frontier Fields data. We spectroscopically identify 182 multiple images from 48 background sources at 0.9<z<6.2, and 171 cluster member galaxies. Several multiple images are associated to individual clumps in multiply lensed resolved sources. By defining a new metric, which is sensitive to the gradients of the deflection field, we show that we can accurately reproduce the positions of these star-forming knots despite their vicinity to the model critical lines. The high signal-to-noise spectra of the MDLF enables the measurement of the internal velocity dispersion of 64 cluster galaxies, down to m(F160W)=22. This allows us to independently estimate the contribution of the subhalo mass component of the lens model from the measured Faber-Jackson scaling relation. Our best reference model, which represents a significant step forward compared to our previous analyses, is selected from a comparative study of different mass parametrizations. The r.m.s. displacement between the observed and model-predicted image positions is only 0.40\\\", 33% smaller than in all previous models. The mass model appears to be particularly well constrained in the MDLF region. 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引用次数: 9
摘要
利用星系团东北区17.1h积分的MUSE深透镜场(MDLF, Vanzella et al. 2020b)和哈勃前沿场数据，建立了星系团MACS J0416.1-2403在z=0.396处的高精度参数强透镜模型。我们从光谱上识别了182张来自48个背景源的多幅图像，这些背景源位于0.9本文章由计算机程序翻译，如有差异，请以英文原文为准。
A new high-precision strong lensing model of the galaxy cluster MACS J0416.1−2403
We present a new high-precision parametric strong lensing model of the galaxy cluster MACS J0416.1-2403, at z=0.396, which takes advantage of the MUSE Deep Lensed Field (MDLF, Vanzella et al. 2020b), with 17.1h integration in the North-East region of the cluster, and Hubble Frontier Fields data. We spectroscopically identify 182 multiple images from 48 background sources at 0.9
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