论文标题
卫星上的模糊暗物质引起的动力摩擦，由轴对数电势描述
Dynamical Friction due to fuzzy dark matter on satellites described by axisymmetric logarithmic potentials
论文作者
论文摘要
合理的暗物质候选者是一种超轻的骨气粒子，称为模糊暗物质。模糊的暗物质玻色子的等效质量能为$ \ sim 10^{ - 22} $ eV，并且具有相应的de broglie kiloparsec尺度波长，因此在传统的传统的冷暗物质模型中表现出与银河系相交的波浪行为，与银河系相当。银河簇中模糊的暗物质的存在将通过动态摩擦影响其成员的运动。在这项工作中，我们对卫星的动力摩擦进行了模拟，遍历最初均匀的模糊黑物质光环。我们专注于卫星的形状超出了椭圆形和对数电势描述的球形对称性。我们发现，由于此类卫星的通过与球形对称的卫星的质量不同，因此在模糊的暗物质光环上产生的唤醒。此外，我们量化了此类系统的动态摩擦系数，发现同一卫星可能会经历$ 5 $的阻力，具体取决于其椭圆度和运动方向。最后，我们发现动态摩擦时间尺度接近哈勃时间，假设卫星为$ 10^{11} $ m $ _ {\ odot} $以$ 10^{3} $ 10^{3} $ km/s的fdm halo的平均密度为$ \ sim 10^6 $ m $ $ m $ _ $ _} $ {
A plausible dark matter candidate is an ultralight bosonic particle referred to as fuzzy dark matter. The equivalent mass-energy of the fuzzy dark matter boson is $\sim 10^{-22}$eV and has a corresponding de Broglie wavelength of kiloparsec scale, thus exhibiting wave behaviour in scales comparable to a galactic core, which could not appear in conventional cold dark matter models. The presence of fuzzy dark matter in galactic clusters will impact the motion of their members through dynamical friction. In this work, we present simulations of the dynamical friction on satellites traversing an initially uniform fuzzy dark matter halo. We focus on the satellites whose shapes are beyond spherical symmetry described by ellipsoidal and logarithmic potentials. We find that the wakes created on the fuzzy dark matter halo due to the passage of such satellites are qualitatively different from those generated by spherically symmetric ones. Furthermore, we quantify the dynamical friction coefficient for such systems, finding that the same satellite may experience a drag differing by a factor of $5$ depending on its ellipticity and the direction of motion. Finally, we find that the dynamical friction time-scale is close to Hubble time, assuming a satellite of $10^{11}$M$_{\odot}$ traversing at $10^{3}$km/s a FDM halo whose mean density is $\sim 10^6$M$_{\odot}$kpc$^{-3}$.
