A versatile tool for cluster lensing source reconstruction – I. Methodology and illustration on sources in the Hubble Frontier Field Cluster MACS J0717.5+3745
A versatile tool for cluster lensing source reconstruction – I. Methodology and illustration on sources in the Hubble Frontier Field Cluster MACS J0717.5+3745
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用于星团透镜源重建的多功能工具 – I. 哈勃前沿场星团 MACS J0717.5+3745 中源的方法论和说明
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
T. Treu
中科院分区：
文献类型：
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作者：
Lilan Yang;S. Birrer;T. Treu
我们描述了一种通用方法来重建由前景星系团的引力势透镜所透镜的源的固有属性。 Lenstruction 工具在公开的多功能引力透镜软件 Lenstronomy 中实现，以便为这一常见的天体物理问题提供简单快速的解决方案。该工具基于对图像平面中源的外观进行正向建模，同时考虑了透镜效应和仪器点扩散函数 (PSF) 造成的畸变。对于单成像源，需要哈勃前沿场 (HFF) 透镜图格式的全局透镜模型作为起点。对于多重图像源，该工具还可以根据数据的质量，对局部重力势进行一阶（偏转）、二阶（剪切、收敛）和三阶（弯曲）校正，以改善整体重建。我们通过从哈勃前沿场获取的两个多重图像系统示例来说明代码的性能和功能，从五个不同的公开可用的星团模型开始。我们发现，经过校正后，多个图像之间的相对放大倍率和其他透镜特性受到严格限制。此外，我们发现重建源大小和幅度模型之间的分散减少了。代码和 jupyter 笔记本是公开的。
We describe a general purpose method to reconstruct the intrinsic properties of sources lensed by the gravitational potential of foreground clusters of galaxies. The tool Lenstruction is implemented in the publicly available multi-purpose gravitational lensing software Lenstronomy, in order to provide easy and fast solution to this common astrophysical problem. The tool is based on forward modeling the appearance of the source in the image plane, taking into account the distortion by lensing and the instrumental point spread function (PSF). For singly-imaged sources a global lens model in the format of the Hubble Frontier Fields (HFF) lensing maps is required as a starting point. For multiply-imaged sources, the tool can also fit and apply first (deflection) second (shear, convergence) and third order (flexion) corrections to the local gravitational potential to improve the overall reconstruction, depending on the quality of the data. We illustrate the performance and features of the code with two examples of multiply-imaged systems taken from the Hubble Frontier Fields, starting from five different publicly available cluster models. We find that, after our correction, the relative magnification - and other lensing properties - between the multiple images become robustly constrained. Furthermore, we find that scatter between models of the reconstructed source size and magnitude is reduced. The code and jupyter notebooks are publicly available.
影响因子：
2.9
作者：
J. Wagner
通讯作者：
J. Wagner
哈勃太空望远镜结合强弱透镜分析碰撞样本：质量和放大率模型以及系统不确定性
DOI：
10.1088/0004-637x/801/1/44
发表时间：
2015
期刊：
The Astrophysical Journal
影响因子：
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作者：
A. Zitrin;A. Fabris;J. Merten;P. Melchior;M. Meneghetti;A. Koekemoer;D. Coe;M. Maturi;M. Bartelmann;M. Postman;K. Umetsu;G. Seidel;I. Sendra;T. Broadhurst;I. Balestra;A. Biviano;C. Grillo;A. Mercurio;M. Nonino;P. Rosati;L. Bradley
通讯作者：
L. Bradley
DOI：
10.1088/0067-0049/199/2/25
发表时间：
2011-06
期刊：
The Astrophysical Journal Supplement Series
影响因子：
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作者：
M. Postman;D. Coe;N. Benı́tez;L. Bradley;T. Broadhurst;M. Donahue;H. Ford;O. Graur;G. Graves-G.-G
通讯作者：
M. Postman;D. Coe;N. Benı́tez;L. Bradley;T. Broadhurst;M. Donahue;H. Ford;O. Graur;G. Graves-G.-G