“尘埃粒子的分布”的版本间差异
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＊MRN model(Mathis, Rumpl & Nordsiek 1977) ,describes the size distribution of dust grains in the MilkWay |
＊MRN model(Mathis, Rumpl & Nordsiek 1977) ,describes the size distribution of dust grains in the MilkWay |
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<math> N(a) |
<math> N(a) \propto a^{-3.5}</math> |
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:grains larger than ∼ 0.2μm are too heavy and remain trapped in the gravitational field of the host galaxy. |
:grains larger than ∼ 0.2μm are too heavy and remain trapped in the gravitational field of the host galaxy. |
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: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; |
: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; |
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2025年11月5日 (三) 11:45的最新版本
Ref. http://arxiv.org/abs/astro-ph/0603833
＊MRN model(Mathis, Rumpl & Nordsiek 1977) ,describes the size distribution of dust grains in the MilkWay
- 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
- 尘埃到行星，粒子分布的gap？arXiv:2511.01957