Probing ISM Models with Hα Observations

Publications of the Astronomical Society of Australia

Andrea Ferrara¹ 

关键词: interstellar medium;    turbulence;   

DOI  :  10.1071/AS98019

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

I review the capabilities of Hα observations to constrain some aspects of the current models of the interstellar medium. In particular, it is shown that turbulence is a necessary ingredient of any viable model, since most of the energy produced by supernova explosions and ionising radiation is stored in kinetic form in the ISM. Various forms of turbulent energy dissipation, including cloud collisions, are analysed. Two additional aspects, concerning the existence of galactic fountains and their relation with high-velocity Clouds, and the extended ionised layer of spiral galaxies are discussed; some crucial experiments are suggested.

【 授权许可】

Unknown