查看“尘埃粒子的分布”的源代码

Ref. http://arxiv.org/abs/astro-ph/0603833

＊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;

*BF model: Bianchi & Ferrara (2005) 
:assuming an initial flat size abundance 
:the post-processed distribution remains nearly flat 
:the size range is slightly shifted towards smaller radii, 0.02−0.15 μm due to erosion sputtering