查看“尘埃粒子的分布”的源代码

＊MRN model(Mathis, Rumpl & Nordsiek 1977) ,describes the size distribution of dust grains in the MilkWay
<math>N(a)\propto a^{−3.5}</math>
:*grains larger than ∼ 0.2μm are too heavy and remain trapped in the gravitational field of the host galaxy.
:*Smaller grains (a<0.05μm) are either destroyed by sputtering or unable to travel far from formation sites as they are inefficiently pushed away by radiation pressure;