THEORETICAL INVESTIGATIONS OF THE EXPANSION OF H II REGIONS.
Abstract
The essential phenomenon is the ionization of hydrogen in the interstellar gas by the radiation emitted in the Lyman continuum by a newly formed star of early spectral type. As the gas is ionized it is heated as well. The volume of ionized gas (the H II region) tends to expand, generating a compression wave moving out through the surrounding neutral interstellar gas (the H I region). The general objective of research in this area has been the construction of theoretical models of the manner in which the gas becomes ionized in an H II region and of the gas-dynamical response of both the neutral gas and the ionized gas to the ionization and heating of the gas.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 12, 1965
- Accession Number
- AD0614715
Entities
People
- Peter O. Vandervoort
Organizations
- University of Chicago