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arXiv 1302.5944astro-ph.COastro-ph.GA
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有限温度标量场暗物质的强透镜

Strong Lensing with Finite Temperature Scalar Field Dark Matter

V. H. Robles, T. Matos

摘要:

我们研究了有限温度标量场暗物质中的引力约束对暗物质晕的影响。我们发现的限制,以产生多个图像的暗物质只,我们表明,有差异,就完整的玻色-爱因斯坦凝聚体晕时,在暗物质晕的标量场的温度考虑。温度的非零性使得标量场处于激发态,近年来,它们的存在被证明是拟合各种大小的暗物质主导星系的旋转曲线所必需的,这也解释了晕密度分布的非普适性。因此,我们期望结合旋转曲线和强透镜系统的观测可以给我们一个线索的性质暗物质。最后,我们提出了一种识别强透镜晕激发态的方法,通过对各种强透镜晕激发态的了解,可以提供标量场暗物质晕演化的信息,这些信息可以通过数值模拟进行验证。

英文摘要:

We investigate the gravitational constraints imposed to dark matter halos in the context of finite temperature scalar field dark matter. We find constraints to produce multiple images by dark matter only, we show that there are differences with respect to the full Bose Einstein condensate halo when the temperature of the scalar field in dark matter halos is taken into account. The non zero temperature allows the scalar field to be in excited states and recently, their existence has proved to be necessary to fit rotation curves of dark matter dominated galaxies of all sizes, it also explained the non universality of the halo density profiles. Therefore, we expect that combining observations of rotation curves and strong lensing systems can give us a clue to the nature of dark matter. Finally, we propose a method to identify the excited state of a strong lens halo, knowing various halo excited states can provide information of the scalar field dark matter halo evolution which can be tested using numerical simulations.

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