Strong lensing with superfluid dark matter
Strong lensing with superfluid dark matter
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DOI：
10.1088/1475-7516/2019/02/001
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发表时间：
2019-02-01
影响因子：
6.4
通讯作者：
Mistele, Tobias
中科院分区：
文献类型：
--
作者：
Hossenfelder, Sabine;Mistele, Tobias
在超流暗物质中，声子的交换可以产生一种额外的力，其效果类似于修正牛顿动力学（MOND）。为了验证这一假设是否与观测相符，我们研究了SLACS巡天中的一组强引力透镜，并检验了它们的测量结果是否可以用星系中心区域的超流体来解释。具体地说，我们试图同时拟合每个透镜的爱因斯坦半径和速度色散与一个具有正常和超流体成分的流体的球对称密度分布。我们证明，我们可以成功地适合所有的星系，除了一个，适合有合理的恒星质量与光比。我们的结论是，强引力透镜并没有对超流暗物质模拟修正引力的想法构成挑战。
In superfluid dark matter the exchange of phonons can create an additional force that has an effect similar to Modified Newtonian Dynamics (MOND). To test whether this hypothesis is compatible with observation, we study a set of strong gravitational lenses from the SLACS survey and check whether the measurements can be explained by a superfluid in the central region of galaxies.Concretely, we try to simultaneously fit each lens's Einstein radius and velocity dispersion with a spherically symmetric density profile of a fluid that has both a normal and a superfluid component. We demonstrate that we can successfully fit all galaxies except one, and that the fits have reasonable stellar mass-to-light-ratios. We conclude that strong gravitational lensing does not pose a challenge for the idea that superfluid dark matter mimics modified gravity.