Two models of molecular cloud in disk galaxies are proposed to investigate the formation of giant molecular clouds (GMCs) under the gravitational instability and random collision using PP(Particle Particle) simulation...Two models of molecular cloud in disk galaxies are proposed to investigate the formation of giant molecular clouds (GMCs) under the gravitational instability and random collision using PP(Particle Particle) simulation. Some conclusions can be drawn: 1) The gravitational instability can make small clouds form large clouds faster than random collision. 2) The differential rotation in the gravitational instability model plays a positive role in the agglomeration of molecular clouds.展开更多
在主流的冷暗物质（cold dark matter，CDM）模型中，暗物质由于引力不稳定性塌缩成位力化的结构，形成所谓的暗物质晕（dark matter halo），然后重子气体由于辐射消耗能量而落入这些暗晕的中心，最终形成星系．暗晕一般是通过等级成...在主流的冷暗物质（cold dark matter，CDM）模型中，暗物质由于引力不稳定性塌缩成位力化的结构，形成所谓的暗物质晕（dark matter halo），然后重子气体由于辐射消耗能量而落入这些暗晕的中心，最终形成星系．暗晕一般是通过等级成团的方式形成，即小质量暗晕先塌缩形成，进而通过并合形成更大尺度的暗晕．并合后的小质量暗晕不会立即消失，展开更多
文摘Two models of molecular cloud in disk galaxies are proposed to investigate the formation of giant molecular clouds (GMCs) under the gravitational instability and random collision using PP(Particle Particle) simulation. Some conclusions can be drawn: 1) The gravitational instability can make small clouds form large clouds faster than random collision. 2) The differential rotation in the gravitational instability model plays a positive role in the agglomeration of molecular clouds.
文摘在主流的冷暗物质（cold dark matter，CDM）模型中，暗物质由于引力不稳定性塌缩成位力化的结构，形成所谓的暗物质晕（dark matter halo），然后重子气体由于辐射消耗能量而落入这些暗晕的中心，最终形成星系．暗晕一般是通过等级成团的方式形成，即小质量暗晕先塌缩形成，进而通过并合形成更大尺度的暗晕．并合后的小质量暗晕不会立即消失，
