Chemical and physical properties of interstellar dust

被引：0
|
作者：
Tielens, A. G. G. M. [1 ]
机构：
[1] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands
来源：
SPECTRAL ENERGY DISTRIBUTION OF GALAXIES | 2012年 / 284期
关键词：
CORE-COLLAPSE SUPERNOVAE; CRYSTALLINE SILICATES; ABUNDANCES; CASSIOPEIA; GRAINS; DEPLETIONS; METEORITES; EMISSION; REMNANT; SHOCKS;
D O I：
10.1017/S1743921312008782
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The characteristics of interstellar dust reflect a complex interplay between stellar injection of stardust, destruction in the ISM, and regrowth in clouds. Astronomical observations and analysis of stardust isolated from meteorites have revealed a highly diverse interstellar and circumstellar grain inventory, including both amorphous materials and highly crystalline compounds (silicates and carbon). This review summarizes this dust budget and inventory. Interstellar dust is highly processed during its sojourn from its birthsite (stellar ejecta) to its incorporation into protoplanetary systems. Processing by strong shocks due to supernova explosions is particularly important. Sputtering by impacting gas ions in shocks in the intercloud medium of the :ISM is counteracted by accretion in cloud phases and their balance sets the observed, interstellar, elemental depletion patterns. Astronomical and meteoritical-stardust evidence for these processes is reviewed and it is concluded that dust formation in the ISM is very rapid. Not surprisingly, the characteristics of interstellar dust are expected to vary widely reflecting local stellar sources, the effects of SNe processing, and the interstellar accretion process.
引用
收藏
页码：72 / 81
页数：10
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