论文标题
引力散射的自我互动暗物质
Self-Interacting Dark Matter from Gravitational Scattering
论文作者
论文摘要
我表明，10^4太阳能物质的深色物体的重力散射和10 km/s的速度提供了自我相互作用的暗物质模型所需的横截面每单位质量，这些模型减轻了对无碰撞的无碰撞阴性暗物质模型的小规模结构挑战。对于质量10^4*（M_4）太阳能的原始物体，以矮星系的速度分散特征移动，10*（v_1）km/s，重力散射的每单位质量为10*[M_4/（V_1）^4] CM^2/g。与速度升高的相互作用急剧下降解释了为什么在大量星系和星系簇的数据中自我相互作用并不明显。
I show that gravitational scattering of dark-matter objects of 10^4 solar masses and speeds of 10 km/s, provides the cross-section per unit mass required in self-interacting dark matter models that alleviate the small-scale structure challenges to the collisionless cold dark matter model. For primordial objects of mass 10^4*(M_4) solar masses, moving at the velocity dispersion characteristic of dwarf galaxies, 10*(v_1) km/s, the cross-section per unit mass for gravitational scattering is 10*[M_4/(v_1)^4] cm^2/g. The steep decline in interaction with increasing velocity explains why self-interaction is not evident in data on massive galaxies and clusters of galaxies.
