Dust Coagulation in Oxygen-rich Circumstellar Outflows

被引：0

作者：

Paquette, John A. ^{[1
]}

Nuth, Joseph A. ^{[1
]}

Ferguson, Frank T. ^{[1
,2
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Solar Syst Explorat Div, Code 690, Greenbelt, MD 20771 USA

[2] Catholic Univ Amer, 620 Michigan Ave, Washington, DC 20064 USA

来源：

ASTROPHYSICAL JOURNAL | 2023年 / 957卷 / 01期

关键词：

SIZE DISTRIBUTION; RADIATION PRESSURE; GRAIN FORMATION; VAPOR-PRESSURE; STELLAR WINDS; CONDENSATION; GROWTH; NUCLEATION; GRAPHITE; DRIVEN;

D O I：

10.3847/1538-4357/acf5e3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the inefficient growth of SiO molecules on (SiO) x dust grains prolongs the period of maximum dust nucleation in circumstellar outflows resulting in a several orders-of-magnitude increase in the dust density near the star. This increase in dust density powers dust coagulation and results in the formation of large fractal aggregates that should be extremely efficient per unit mass in coupling to both the stellar radiation field and to the ambient gas.

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页数：11

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