论文标题
在暗物质耗散自我互动后，阳光周围的光环紧凑
Compact Halo around the Sun Accreted after Dark Matter Dissipative Self Interaction
论文作者
论文摘要
如果暗物质粒子由于其耗散的自散射而可以减速，除了在星系尺度下沉没以加快结构形成，它也可以吸收到局部天体（例如太阳）上，形成紧凑的光环。通过一些简化的假设，我们根据椭圆轨道的分区函数开发玻尔兹曼方程集，并将其用于积聚过程。我们发现，轨道的暗物质颗粒将在太阳周围形成光环，其密度曲线非常适合与$ r^{ - 1.6} $成正比，范围很大。虽然在地球上，这种局部光环的贡献总是比银河系分量以下的几个顺序，而在围绕太阳围绕太阳的一个很小的区域中，沉没的暗物质颗粒可以导致光环密度多几个订单比背景银河系组件大，尤其是在小型减速速度的参数区域和较大的交叉截面的参数区域中，这仍然与当前的约束保持一致。这种潜在的暗物质局部光环具有显着增强的密度，将是暗物质间接检测的一个非常有趣的来源。
If dark matter particle can be decelerated due to its dissipative self scattering, except for sinking at the galaxy scale to speed up structure formation, it can also be accreted onto local celestial bodies such as the Sun, forming a compact halo. With some simplified assumptions we develop the Boltzmann equation set based on the partition function of the elliptical orbits, and numerically solve it for the accretion process. We find that the orbited dark matter particles will form a halo around the Sun, with the density profile well fitted to be proportional to $r^{-1.6}$ in a wide range of radius. While around the earth such local halo contribution is always several orders below the galactic component, in a very small region centered around the Sun the sunk dark matter particles can lead to a halo density several orders larger than the background galactic component, in particular in the parameter region of small deceleration speed and large cross section, which is still consistent with current constraints. Such potential dark matter local halo with significantly enhanced density will be a very interesting source for dark matter indirect detection if the corresponding channel exists, we discuss the possibility of the gamma-ray spectrum in the solar direction in some detail as an example.
