The dynamical evolution of H II regions - Recent theoretical developments
H. W. Yorke;
ARAA, 1986, 24, 49
ABSTRACT:Recent H II line observations of stellar systems are discussed with regard to the capabilities of current
models of stellar formation, structure and dynamics.
Observations of
emission nebulae arising from the interaction between the interstellar medium
and evolving stars are summarized and time scales of stellar evolution are
examined.
A system of basic equations that consider MHD flows, radiation
transfer, ionization, recombination, thermal energy balance, boundary
conditions and initial values is defined for the density and temperature range of H
II regions.
Current numerical models for the evolution of H II regions
are summarized.
Planned observations of ultracompact H II regions,
blisters and champagne flow are described.
KEYWORDS: h ii regions, interstellar matter, molecular clouds, boundary conditions, boundary value problems, ionization, magnetohydrodynamics, nebulae, radiative transfer, recombination reactions, stellar evolution
PERSOKEY:region hii, ,
CODE: yorke86