New mechanism of dust growth and gravitation-like instabilities in astrophysical plasmas

被引：40

作者：

Bingham, R ^{[1
]}

Tsytovich, VN

机构：

[1] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[2] Univ Strathclyde, Glasgow G1 1XQ, Lanark, Scotland

[3] Russian Acad Sci, Inst Gen Phys, Moscow, Russia

[4] Moscow Phys Tech Inst, Moscow, Russia

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 376卷 / 03期

关键词：

dust; agglomeration : plasma : gravitational collapse;

D O I：

10.1051/0004-6361:20011103

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Dust growth by agglomeration due to a new mechanism of dust attraction is shown to compete in space plasmas with the standard accretion mechanism by neutral particles. We demonstrate that dust growth by accretion of neutrals and plasma particles is aided by a pressure force due to a shadowing effect first proposed (Bingham & Tsytovich 2001) to explain rapid growth of dust in laboratory discharges. Consequences of this new force promoting dust growth by agglomeration in astrophysics are discussed including the role of a new gravitational-like instability which produces clumping enhancing the rate of gravitational collapse.

引用

页码：L43 / L47

页数：5

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