Combining weak and strong lensing in cluster potential reconstruction
Combining weak and strong lensing in cluster potential reconstruction
复制标题
在簇势重建中结合弱透镜和强透镜
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
L. Moscardini
中科院分区：
文献类型：
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作者：
M. Cacciato;M. Cacciato;M. Bartelmann;M. Meneghetti;L. Moscardini
我们提出了一种方法来恢复星系团的二维引力势，它结合了弱引力透镜和强引力透镜的数据。在临界曲线的近似位置，改进了弱透镜势的第一次估计。该方法可以完全线性化，不依赖于多个图像的存在和识别。我们使用模拟表明，它恢复的表面质量密度分布和分布非常准确，即使关键曲线只有部分已知，如果他们的位置是现实的不确定性。我们进一步描述了如何在不同的红移弧可以组合，以及如何从弱透镜偏差可以包括在内。
We propose a method for recovering the two-dimensional gravitational potential of galaxy clusters which combines data from weak and strong gravitational lensing. A first estimate of the potential from weak lensing is improved at the approximate locations of critical curves. The method can be fully linearised and does not rely on the existence and identification of multiple images. We use simulations to show that it recovers the surface-mass density profiles and distributions very accurately,even if critical curves are only partially known and if their location is realistically uncertain. We further describe how arcs at different redshifts can be combined, and how deviations from weak lensing can be included.