On the thermal instability in numerical models of the interstellar medium

被引：6

作者：

Dib, S ^{[1
]}

Burkert, A ^{[1
]}

Hujeirat, A ^{[1
]}

机构：

[1] Max Planck Inst Astron, D-69117 Heidelberg, Germany

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2004年 / 289卷 / 3-4期

关键词：

thermal instability; ISM; molecular clouds;

D O I：

10.1023/B:ASTR.0000014979.53047.f4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate with 3D hydrodynamical simulations the role played by thermal processes in the dynamical evolution of the interstellar medium (ISM). A parametric approach of the cooling process shows that the observed mass fraction of the cold (< 300 K) and unstable gas (300K < T < 6000K) can not be produced by turbulent compression or background heating of the medium alone. An analysis of the properties of the clouds that are formed by the combined effect of the thermal and gravitational instability shows that the cloud's scaling relations imprinted by the thermal instability (TI) are in good agreement with observational values.

引用

页码：465 / 468

页数：4

共 10 条

[1] Physical versus observational properties of clouds in turbulent molecular cloud models [J].