论文标题
暗物质对等温气云的重力稳定性的影响
Influence of dark matter on gravitational stability of isothermal gas clouds
论文作者
论文摘要
迄今为止，暗物质（DM）的存在只能通过其在可见物质上的重力相互作用来判断。因此，重要的是要找到这种相互作用的后果，然后可以帮助确定DM属性和参数以及可见物质的动力学和演变。考虑到暗物质对星际介质（ISM）的稳定性的引力影响，即恒星和恒星簇的祖细胞。等温自重气体被视为描述ISM的合适模型，仅在重力上相互作用的粒子被视为DM。通过分析方法获得的结果表明，即使是少量快速DM颗粒也会显着增加气体云的稳定半径和相应的质量，而DM的较高相对密度则破坏了气体的稳定性。结果表明，使用ISM和DM的典型参数，其存在会增加等温云的最大稳定质量，而半径则增加了5倍。
To date, the presence of dark matter (DM) can be judged only by its gravitational interaction on the visible matter. It is therefore important to find the consequences of this interaction, which can then help to determine both the DM properties and parameters and the dynamics and evolution of visible matter. The gravitational influence of dark matter on the stability of interstellar medium (ISM), the progenitor of stars and star clusters, was considered. An isothermal self-gravity gas was taken as a suitable model describing ISM, particles interacting only gravitationally were considered as DM. The results obtained by analytical methods show that even a small amount of fast DM particles significantly increases the stable radius of the gas cloud and the corresponding mass while a higher relative density of DM destabilizes the gas. It was shown that with typical parameters of ISM and DM, its presence increases the maximum stable mass of isothermal cloud by a factor of four and the radius by five.
