arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1809.00840astro-ph.GAgr-qc
收藏

超流暗物质的强透镜效应

Strong lensing with superfluid dark matter

Sabine Hossenfelder, Tobias Mistele

摘要:

在超流暗物质中,声子的交换可以产生一种额外的力,这种力具有类似于修正牛顿动力学(MOND)的效果。为了检验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,并检查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,我们试图同时适合每个透镜的爱因斯坦半径和速度色散与球对称的密度分布的流体,有一个正常的和超流的组件。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。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑