Neutral hydrogen and the diffuse interstellar medium.
Abstract
The present state of observational knowledge of neutral hydrogen and the diffuse interstellar medium is discussed in the light of the present state of theoretical understanding. The structure of the diffuse interstellar medium as revealed by H I emission is addressed, including low-velocity gas in shells, filaments, major H I concentrations around dark clouds and newly formed stars, as well as intermediate-velocity gas, supershells, and 'worms'. The temperature and ionization of the diffuse interstellar medium is examined, and the interstellar magnetic fields are considered, including the methods of measurement.
- Publication:
-
Galactic and Extragalactic Radio Astronomy
- Pub Date:
- 1988
- Bibcode:
- 1988gera.book...95K
- Keywords:
-
- Diffuse Radiation;
- Hydrogen Clouds;
- Interstellar Matter;
- Molecular Clouds;
- Absorption Spectra;
- Dark Matter;
- Gas Dynamics;
- H Lines;
- Interstellar Gas;
- Interstellar Magnetic Fields;
- Radiative Transfer;
- Spectral Emission;
- Astrophysics;
- Galaxy:Magnetic Fields;
- H I Clouds:Interstellar Matter;
- Interstellar Clouds:Radiative Transfer;
- Interstellar Matter:H I Clouds;
- Interstellar Matter:Magnetic Fields;
- Magnetic Fields:Galaxy;
- Magnetic Fields:Interstellar Matter;
- Radiative Transfer:Interstellar Clouds